039 FOUS62 KALR 220032 FFGSJU COUNTY FLASH FLOOD GUIDANCE...PUERTO RICO NATIONAL WEATHER SERVICE SOUTHEAST RIVER FORECAST CENTER...ATLANTA GA 830 PM EDT FRI AUG 21 2026 INCHES OF RAINFALL FOR SPECIFIED DURATIONS REQUIRED TO PRODUCE FLASH FLOODING IN FORECAST ZONES. LOWER AMOUNTS MAY CAUSE FLASH FLOODING IN URBAN OR MOUNTAINOUS AREAS. .B ALR 20260822 Z DH00/DC202608220030 /DUE/PPHCF/PPTCF/PPQCF :IDENTIFIERS ARE 2-LETTER STATE, Z FOR ZONE, 3-DIGIT ZONE NUMBER : :IDENT 1HR 3HR 6HR ZONE NAME :======= ==== ==== ==== ==================== PRZ001 1.9/ 3.5/ 4.8 PRZ002 1.9/ 3.5/ 4.8 PRZ003 1.9/ 3.2/ 4.6 PRZ004 1.9/ 3.2/ 4.6 PRZ005 1.5/ 2.1/ 2.7 PRZ006 1.5/ 2.1/ 2.7 PRZ007 1.5/ 2.1/ 2.7 PRZ008 1.5/ 2.1/ 2.7 PRZ009 1.5/ 2.1/ 2.7 PRZ010 1.5/ 2.1/ 2.7 PRZ011 1.5/ 2.1/ 2.7 PRZ012 2.0/ 3.2/ 4.5 PRZ013 2.0/ 3.2/ 4.5 VIZ001 2.1/ 3.2/ 4.6 VIZ002 2.1/ 3.2/ 4.6 .END $$ S.E.R.F.C. 770-486-0028 or 770-282-2112 Regular Hours 6am-10pm Eastern Time After Hours Please Follow Callback Instructions  738 FGUS74 KORN 220105 FFHMRX HEADWATER GUIDANCE FOR HSA.....MORRISTOWN TN NATIONAL WEATHER SERVICE LOWER MISSISSIPPI RIVER FORECAST CENTER, SLIDELL LA 800 PM CDT FRI AUG 21 2026 INCHES OF RAINFALL FOR SPECIFIED DURATIONS REQUIRED TO PRODUCE FLASH FLOODING IN HEADWATERS. .B SIL 260822 Z DH00/DC2608220100 /DUE/PPHCF/PPTCF/PPQCF/PPKCF/PPDCF : :IDENT 1HR 3HR 6HR 12HR 24HR HEADWATER NAME STREAM :======= ==== ==== ==== ==== ==== ==================== ================== : :.....TENNESSEE : DOET1 3.0/ 3.4/ 3.9/ 4.7/ 5.8 :ELIZABETHTON, TN DOE R. RMTT1 3.3/ 3.7/ 5.5/ 5.5/ 5.9 :ROAN MOUNTAIN, TN DOE R. : :.....VIRGINIA : CLVV2 2.4/ 2.6/ 2.9/ 3.4/ 4.3 :CLEVELAND, VA CLINCH R. .END $$  725 FOUS74 KORN 220105 FFHFFC HEADWATER GUIDANCE FOR HSA.....ATLANTA GA NATIONAL WEATHER SERVICE LOWER MISSISSIPPI RIVER FORECAST CENTER, SLIDELL LA 800 PM CDT FRI AUG 21 2026 INCHES OF RAINFALL FOR SPECIFIED DURATIONS REQUIRED TO PRODUCE FLASH FLOODING IN HEADWATERS. .B SIL 260822 Z DH00/DC2608220100 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : :.....GEORGIA : ENGG1 0.8/ 1.2/ 1.6 :NEW ENGLAND, GA LOOKOUT CREEK HWEG1 3.4/ 3.6/ 3.9 :HIAWASSEE, GA HIAWASSEE R. .END $$  726 FOUS74 KORN 220105 FFHHUN HEADWATER GUIDANCE FOR HSA.....HUNTSVILLE AL NATIONAL WEATHER SERVICE LOWER MISSISSIPPI RIVER FORECAST CENTER, SLIDELL LA 800 PM CDT FRI AUG 21 2026 INCHES OF RAINFALL FOR SPECIFIED DURATIONS REQUIRED TO PRODUCE FLASH FLOODING IN HEADWATERS. .B SIL 260822 Z DH00/DC2608220100 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : :.....ALABAMA : FRYA1 0.9/ 1.2/ 1.6 :FARLEY, AL ALDRIDGE CREEK SHEA1 0.7/ 1.2/ 1.6 :SHERWOOD, AL ALDRIDGE CREEK ATNA1 3.5/ 4.4/ 4.9 :ATHENS, AL LIMESTONE CREEK BPPA1 2.1/ 2.2/ 2.5 :BUCKS POCKET, AL S. SAUTY CREEK MADA1 1.5/ 1.7/ 2.0 :MADISON, AL INDIAN CREEK .END $$  728 FOUS74 KORN 220105 FFHGSP HEADWATER GUIDANCE FOR HSA.....GREENVILLE/SPARTANBURG SC NATIONAL WEATHER SERVICE LOWER MISSISSIPPI RIVER FORECAST CENTER, SLIDELL LA 800 PM CDT FRI AUG 21 2026 INCHES OF RAINFALL FOR SPECIFIED DURATIONS REQUIRED TO PRODUCE FLASH FLOODING IN HEADWATERS. .B SIL 260822 Z DH00/DC2608220100 /DUE/PPHCF/PPTCF/PPQCF/PPKCF/PPDCF : :IDENT 1HR 3HR 6HR 12HR 24HR HEADWATER NAME STREAM :======= ==== ==== ==== ==== ==== ==================== ================== : :.....NORTH CAROLINA : ROSN7 3.4/ 4.2/ 5.5/ 6.0/ 6.5 :ROSMAN, NC FRENCH BROAD R. BLTN7 2.8/ 4.0/ 5.5/ 6.0/ 6.5 :BILTMORE, NC SWANNANOAH R. BIRN7 3.5/ 4.6/ 5.5/ 6.0/ 6.5 :BIRDTOWN, NC OCONALUFTEE R. .END $$  731 FOUS74 KORN 220105 FFHJAN HEADWATER GUIDANCE FOR HSA.....JACKSON MS NATIONAL WEATHER SERVICE LOWER MISSISSIPPI RIVER FORECAST CENTER, SLIDELL LA 800 PM CDT FRI AUG 21 2026 INCHES OF RAINFALL FOR SPECIFIED DURATIONS REQUIRED TO PRODUCE FLASH FLOODING IN HEADWATERS. .B SIL 260822 Z DH00/DC2608220100 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : :.....MISSISSIPPI : MEIM6 3.5/ 5.0/ 5.5 :MERIDIAN, MS SOWASHEE CREEK JCCM6 3.5/ 5.0/ 5.5 :JACKSON, MS CANY CREEK JHMM6 3.5/ 5.0/ 5.5 :JACKSON, MS HANGING MOSS CREEK LYNM6 3.5/ 5.0/ 5.5 :JACKSON, MS LYNCH CREEK TOWM6 3.5/ 5.0/ 5.5 :JACKSON, MS TOWN CREEK UBCM6 3.5/ 5.0/ 5.5 :JACKSON, MS EUBANKS CREEK .END $$  732 FOUS74 KORN 220105 FFHLZK HEADWATER GUIDANCE FOR HSA.....LITTLE ROCK AR NATIONAL WEATHER SERVICE LOWER MISSISSIPPI RIVER FORECAST CENTER, SLIDELL LA 800 PM CDT FRI AUG 21 2026 INCHES OF RAINFALL FOR SPECIFIED DURATIONS REQUIRED TO PRODUCE FLASH FLOODING IN HEADWATERS. .B SIL 260822 Z DH00/DC2608220100 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : :.....ARKANSAS : BTNA4 3.5/ 5.0/ 5.5 :BENTON, AR SALINE R. CIGA4 2.9/ 3.6/ 4.3 :CLINTON, AR S. FK LZKTLE RED R. HDYA4 3.5/ 5.0/ 5.5 :HARDY, AR SPRING R. .END $$  736 FOUS74 KORN 220105 FFHRNK HEADWATER GUIDANCE FOR HSA.....BLACKSBURG VA NATIONAL WEATHER SERVICE LOWER MISSISSIPPI RIVER FORECAST CENTER, SLIDELL LA 800 PM CDT FRI AUG 21 2026 INCHES OF RAINFALL FOR SPECIFIED DURATIONS REQUIRED TO PRODUCE FLASH FLOODING IN HEADWATERS. .B SIL 260822 Z DH00/DC2608220100 /DUE/PPHCF/PPTCF/PPQCF/PPKCF/PPDCF : :IDENT 1HR 3HR 6HR 12HR 24HR HEADWATER NAME STREAM :======= ==== ==== ==== ==== ==== ==================== ================== : :.....VIRGINIA : SALV2 2.2/ 2.4/ 2.7/ 3.2/ 4.1 :SALTVILLE, VA N.F. HOLSTON R. SGWN7 1.4/ 1.4/ 1.6/ 2.1/ 3.0 :SUGAR GROVE, NC WATAUGA R. SMFV2 2.8/ 3.0/ 3.3/ 3.8/ 4.6 :SEVEN MILE FORD, VA M.F. HOLSTON R. RLRV2 1.6/ 1.7/ 1.8/ 2.1/ 3.0 :RICHLANDS, VA CLINCH R. .END $$  737 FOUS74 KORN 220105 FFHSHV HEADWATER GUIDANCE FOR HSA.....SHREVEPORT LA NATIONAL WEATHER SERVICE LOWER MISSISSIPPI RIVER FORECAST CENTER, SLIDELL LA 800 PM CDT FRI AUG 21 2026 INCHES OF RAINFALL FOR SPECIFIED DURATIONS REQUIRED TO PRODUCE FLASH FLOODING IN HEADWATERS. .B SIL 260822 Z DH00/DC2608220100 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : :.....LOUISIANA : KEIL1 3.5/ 5.0/ 5.5 :KEITHVILLE, LA CYPRESS BAYOU .END $$  739 FOUS74 KORN 220105 FFHLSX HEADWATER GUIDANCE FOR HSA.....ST. LOUIS MO NATIONAL WEATHER SERVICE LOWER MISSISSIPPI RIVER FORECAST CENTER, SLIDELL LA 800 PM CDT FRI AUG 21 2026 INCHES OF RAINFALL FOR SPECIFIED DURATIONS REQUIRED TO PRODUCE FLASH FLOODING IN HEADWATERS. .B SIL 260822 Z DH00/DC2608220100 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : :.....MISSOURI : ANNM7 3.0/ 3.8/ 4.6 :ANNAPOLIS, MO BLACK R. .END $$  890 FOUS71 KRHA 220150 FFHNJ1 HEADWATER STATEMENT FOR NEW JERSEY STREAMS MIDDLE ATLANTIC RIVER FORECAST CENTER NATIONAL WEATHER SERVICE STATE COLLEGE PA 930 PM EDT FRI AUG 21 2026 APPROXIMATE 1/3/6/12-HR BASIN AVERAGED RAINFALL (INCHES) REQUIRED TO CAUSE MINOR, MODERATE, AND MAJOR FLOODING AT THE INDICATED HEADWATER LOCATIONS. .B RHA 260822 Z DH00/DC2608220130/DUE/PPHCF/PPTCF/PPQCF/PPKCF : :IDENT 1HR 3HR 6HR 12HR HEADWATER NAME STREAM :======= ==== ==== ==== ==== ==================== ================== : : NWS BROOKHAVEN SERVICE AREA... : Ramapo River... MAWN4 2.0/ 2.2/ 2.7/ 3.0 :Mahwah (8ft) Ramapo River :MAWN4md 2.2/ 2.5/ 3.1/ 3.6 Mahwah (9) Ramapo River :MAWN4mj 3.2/ 3.7/ 4.8/ 5.4 Mahwah (12) Ramapo River : Hohokus Brook... HOHN4 0.9/ 1.1/ 1.5/ 2.3 :Ho-Ho-Kus (3ft) Hohokus Brook : Saddle River... LODN4 1.0/ 1.1/ 1.2/ 1.8 :Lodi (5.5ft) Saddle River :LODN4md 1.5/ 1.5/ 1.8/ 2.6 Lodi (7) Saddle River :LODN4mj 1.8/ 1.8/ 2.1/ 3.0 Lodi (8) Saddle River : Rahway River... SPGN4 1.4/ 1.4/ 1.5/ 2.0 :Springfield (5.5ft) Rahway River : : NWS MT. HOLLY SERVICE AREA... : PASSAIC BASIN... : Passaic River... CAMN4 2.5/ 2.6/ 3.4/ 3.7 :Chatham (6ft) Passaic River :CAMN4md 4.6/ 4.7/ 5.5/ 6.0 Chatham (7.2) Passaic River :CAMN4mj 5.2/ 5.5/ 6.4/ 7.2 Chatham (8.2) Passaic River : Rockaway River... BOTN4 3.5/ 3.9/ 4.4/ 5.3 :Boonton Abv. (5ft) Rockaway River :BOTN4md 4.0/ 4.5/ 5.2/ 6.4 Boonton Abv. (6) Rockaway River :BOTN4mj 4.3/ 4.9/ 5.6/ 7.0 Boonton Abv. (7) Rockaway River : Whippany River... WHIN4 1.9/ 2.1/ 2.4/ 2.5 :Morristown (6ft) Whippany River : RARITAN BASIN.. : South Branch Raritan River... STTN4 2.2/ 2.3/ 2.9/ 3.2 :Stanton (8ft) S. Br. Raritan River :STTN4md 2.3/ 2.5/ 3.4/ 3.9 Stanton (10) S. Br. Raritan River :STTN4mj 2.6/ 2.8/ 4.0/ 4.7 Stanton (12) S. Br. Raritan River : North Branch Raritan River... RRTN4 1.8/ 2.1/ 2.4/ 2.8 :Raritan (10ft) N. Br. Raritan River :RRTN4md 2.0/ 2.3/ 2.8/ 3.6 Raritan (12) N. Br. Raritan River :RRTN4mj 2.4/ 2.8/ 3.6/ 4.5 Raritan (15) N. Br. Raritan River : Millstone River... BKWN4 2.9/ 3.1/ 3.4/ 3.4 :Blackwells Mills(9ft) Millstone River :BKWN4md 2.9/ 3.2/ 3.5/ 3.5 Blackwells Mills(10) Millstone River :BKWN4mj 3.3/ 3.6/ 4.1/ 4.8 Blackwells Mills(15) Millstone River : DELAWARE BASIN... : Assunpink Creek...TACN4 2.0/ 2.2/ 2.6/ 3.2 :Trenton (8.5ft) Assunpink Creek :TACN4md 2.2/ 2.4/ 3.2/ 3.6 Trenton (9.5) Assunpink Creek :TACN4mj 2.3/ 2.7/ 3.5/ 4.2 Trenton (11) Assunpink Creek .END $$ NNNN $$ NNNN  892 FOUS71 KRHA 220150 FFHPA2 HEADWATER STATEMENT FOR THE DELAWARE AND SUSQUEHANNA BASINS MIDDLE ATLANTIC RIVER FORECAST CENTER NATIONAL WEATHER SERVICE STATE COLLEGE PA 930 PM EDT FRI AUG 21 2026 APPROXIMATE 1/3/6/12-HR BASIN AVERAGED RAINFALL (INCHES) REQUIRED TO CAUSE MINOR, MODERATE, AND MAJOR FLOODING AT THE INDICATED HEADWATER LOCATIONS. .B RHA 260822 Z DH00/DC2608220130/DUE/PPHCF/PPTCF/PPQCF/PPKCF : :IDENT 1HR 3HR 6HR 12HR HEADWATER NAME :======= ==== ==== ==== ==== ==================== : : NWS BINGHAMTON SERVICE AREA... : SUSQUEHANNA BASIN... : Tioughnioga River... CRTN6 2.5/ 2.8/ 3.1/ 3.4 :Cortland (8ft) :CRTN6md 2.6/ 3.0/ 3.9/ 4.3 Cortland (10) :CRTN6mj 2.8/ 3.3/ 4.4/ 5.0 Cortland (12.5) : Chenango River... SHBN6 2.6/ 2.8/ 3.0/ 3.5 :Sherburne (8.5ft) :SHBN6md 2.6/ 2.9/ 3.3/ 4.3 Sherburne (9) :SHBN6mj 2.8/ 3.1/ 3.8/ 4.7 Sherburne (10.6) : Otselic River... CINN6 3.0/ 3.2/ 3.7/ 4.6 :Cincinnatus (9ft) : ...moderate and major flood stages above rating table. : Cohocton River... CMPN6 2.8/ 3.1/ 3.6/ 4.4 :Campbell (8ft) :CMPN6md 3.0/ 3.4/ 4.5/ 5.0 Campbell (10) :CMPN6mj 3.2/ 3.7/ 5.0/ 5.7 Campbell (11) : Canisteo River... WCRN6 2.1/ 2.4/ 3.0/ 3.8 :West Cameron (17ft) :WCRN6md 2.2/ 2.5/ 3.1/ 4.0 West Cameron (18) :WCRN6mj 2.4/ 2.8/ 3.7/ 4.7 West Cameron (21) : Towanda Creek... MONP1 1.7/ 1.9/ 2.4/ 3.0 :Monroeton (15.5ft) :MONP1md 1.9/ 2.1/ 2.6/ 3.3 Monroeton (17) :MONP1mj 2.1/ 2.3/ 3.0/ 3.8 Monroeton (18.5) : Tunkhannock Creek... TNKP1 2.3/ 2.8/ 4.0/ 4.6 :Tunkhannock (11ft) :TNKP1md 2.5/ 3.0/ 4.4/ 5.3 Tunkhannock (14) :TNKP1mj 2.7/ 3.3/ 4.9/ 5.9 Tunkhannock (17) : Lackawanna River... OFRP1 2.3/ 2.7/ 3.3/ 4.5 :Old Forge (11ft) :OFRP1md 2.4/ 2.8/ 3.5/ 4.8 Old Forge (13) :OFRP1mj 2.6/ 3.1/ 3.9/ 5.2 Old Forge (16) : DELAWARE BASIN... : East Branch Delaware River... MRGN6 3.5/ 3.9/ 4.5/ 5.0 :Margaretville (11ft) :MRGN6md 4.2/ 4.7/ 5.4/ 6.2 Margaretville (12) :MRGN6mj 4.9/ 5.5/ 6.6/ 7.6 Margaretville (13) : West Branch Delaware River... WALN6 2.5/ 2.6/ 2.9/ 3.4 :Walton (11.5ft) :WALN6md 2.8/ 3.0/ 3.4/ 3.9 Walton (14) :WALN6mj 3.4/ 3.7/ 4.2/ 4.7 Walton (16) : Beaverkill Creek... CKFN6 1.8/ 1.9/ 2.2/ 2.7 :Cooks Falls (10ft) :CKFN6md 2.6/ 2.8/ 3.5/ 4.6 Cooks Falls (16) :CKFN6mj 3.0/ 3.3/ 4.3/ 5.6 Cooks Falls (18) : Lackawaxen River... HWYP1 2.4/ 2.7/ 3.2/ 4.0 :Hawley (14ft) :HWYP1md 3.1/ 3.5/ 4.3/ 5.3 Hawley (20) :HWYP1mj 3.4/ 3.8/ 4.7/ 5.8 Hawley (22) : : NWS STATE COLLEGE SERVICE AREA... : SUSQUEHANNA BASIN... : Tioga River... MFDP1 1.8/ 2.4/ 3.4/ 4.1 :Mansfield (12ft) :MFDP1md 1.9/ 2.6/ 3.8/ 4.5 Mansfield (13) :MFDP1mj 2.1/ 2.9/ 4.3/ 5.1 Mansfield (14) : Penns Creek... PNCP1 2.7/ 3.0/ 3.1/ 3.4 :Penns Creek (8ft) :PNCP1md 2.8/ 3.2/ 3.6/ 4.5 Penns Creek (10) :PNCP1mj 3.0/ 3.5/ 4.3/ 5.4 Penns Creek (12) : Frankstown Branch Juniata River... WIBP1 1.7/ 1.9/ 2.1/ 2.1 :Williamsburg (12ft) :WIBP1md 1.7/ 1.9/ 2.2/ 2.4 Williamsburg (13) :WIBP1mj 1.8/ 2.0/ 2.4/ 2.9 Williamsburg (15) : Little Juniata River... SPKP1 1.4/ 1.5/ 1.7/ 1.7 :Spruce Creek (8ft) :SPKP1md 1.6/ 1.6/ 1.9/ 2.0 Spruce Creek (10) :SPKP1mj 2.0/ 2.1/ 2.6/ 2.9 Spruce Creek (14) : Aughwick Creek... SLYP1 1.5/ 1.6/ 1.7/ 2.1 :Shirleysburg (10ft) :SLYP1md 1.7/ 1.8/ 2.0/ 2.5 Shirleysburg (12) :SLYP1mj 3.8/ 4.2/ 5.0/ 6.8 Shirleysburg (20) : Sherman Creek... SMDP1 2.1/ 2.5/ 3.0/ 3.5 :Shermans Dale (9ft) :SMDP1md 2.5/ 2.9/ 3.5/ 4.1 Shermans Dale (11) :SMDP1mj 3.8/ 4.5/ 5.4/ 6.2 Shermans Dale (16) : Conodoguinet Creek... HGSP1 3.2/ 3.3/ 3.4/ 3.4 :Hogestown (8ft) :HGSP1md 3.4/ 3.6/ 4.4/ 4.9 Hogestown (10) :HGSP1mj 3.7/ 4.2/ 5.1/ 5.7 Hogestown (12) : Yellow Breeches Creek... CPHP1 1.8/ 2.1/ 2.4/ 3.8 :Camp Hill (7ft) :CPHP1md 1.9/ 2.2/ 2.7/ 4.1 Camp Hill (9) :CPHP1mj 2.4/ 2.8/ 3.8/ 5.3 Camp Hill (13) : Swatara Creek... HTVP1 1.9/ 2.3/ 2.9/ 4.1 :Harper Tavern (9ft) :HTVP1md 2.2/ 2.7/ 3.6/ 5.1 Harper Tavern (12) :HTVP1mj 2.6/ 3.2/ 4.1/ 5.9 Harper Tavern (15) : Conestoga River... LNCP1 1.6/ 2.0/ 2.1/ 3.0 :Lancaster (11ft) :LNCP1md 1.8/ 2.2/ 2.4/ 3.3 Lancaster (13) :LNCP1mj 1.9/ 2.4/ 2.8/ 3.8 Lancaster (15) : DELAWARE BASIN... : Schuylkill River... LGVP1 2.5/ 2.7/ 2.8/ 2.9 :Landingville (8ft) :LGVP1md 3.3/ 3.6/ 3.8/ 4.1 Landingville (12) :LGVP1mj 4.1/ 4.5/ 4.8/ 5.3 Landingville (14) : : NWS MT. HOLLY SERVICE AREA... : DELAWARE BASIN... : Schuylkill River... BREP1 2.9/ 3.7/ 4.7/ 5.9 :Berne (12ft) :BREP1md 3.2/ 4.2/ 5.3/ 6.9 Berne (14) :BREP1mj 3.5/ 4.6/ 5.8/ 7.6 Berne (16) : Bush Kill... SHOP1 2.6/ 3.2/ 3.4/ 3.4 :Shoemakers (6ft) :SHOP1md 2.8/ 3.4/ 4.0/ 4.5 Shoemakers (7) :SHOP1mj 3.0/ 3.6/ 4.5/ 5.0 Shoemakers (8) : Brodhead Creek... MNSP1 1.8/ 2.1/ 2.8/ 3.7 :Minisink Hills(10ft) :MNSP1md 1.9/ 2.3/ 3.1/ 4.1 Minisink Hills(12) :MNSP1mj 2.1/ 2.6/ 3.6/ 4.8 Minisink Hills(15) : Little Lehigh Creek...APAP1 4.3/ 4.6/ 5.1/ 6.0 :Allentown-10th (8ft) :APAP1md 5.2/ 5.6/ 6.2/ 7.5 Allentown-10th (10) :APAP1mj 6.2/ 6.7/ 7.4/ 8.0 Allentown-10th (12) : Perkiomen Creek... GRAP1 1.7/ 2.1/ 2.7/ 3.4 :Graterford (11ft) :GRAP1md 1.9/ 2.3/ 3.1/ 3.8 Graterford (13) :GRAP1mj 2.2/ 2.7/ 3.7/ 4.5 Graterford (16) : Neshaminy Creek... LNGP1 2.4/ 2.4/ 2.4/ 2.4 :Langhorne (9ft) :LNGP1md 2.6/ 2.7/ 2.9/ 2.9 Langhorne (10) :LNGP1mj 2.8/ 3.0/ 3.4/ 3.7 Langhorne (12) : Chester Creek... CHSP1 1.7/ 1.7/ 2.0/ 2.6 :Chester (8ft) :CHSP1md 2.2/ 2.2/ 2.6/ 3.3 Chester (10) :CHSP1mj 3.1/ 3.2/ 3.6/ 4.6 Chester (14) : West Branch Brandywine Creek... MODP1 3.7/ 3.9/ 4.2/ 4.5 :Modena (9ft) :MODP1md 4.3/ 4.5/ 4.9/ 5.2 Modena (10) :MODP1mj 6.5/ 7.0/ 7.4/ 8.0 Modena (12) : East Branch Brandywine Creek... DWNP1 1.0/ 1.0/ 1.1/ 1.2 :Downingtown (7ft) :DWNP1md 1.7/ 1.7/ 1.8/ 2.0 Downingtown (9) :DWNP1mj 2.5/ 2.6/ 2.7/ 3.0 Downingtown (11) : Brandywine Creek... CDFP1 2.0/ 2.0/ 2.1/ 2.3 :Chadds Ford (9ft) :CDFP1md 2.2/ 2.2/ 2.6/ 3.3 Chadds Ford (11) :CDFP1mj 2.4/ 2.5/ 3.3/ 4.1 Chadds Ford (13) : Christina River... CHBD1 1.5/ 1.6/ 1.9/ 2.7 :Coochs Brdg(11ft) :CHBD1md 1.8/ 2.0/ 2.4/ 3.3 Coochs Brdg(12) :CHBD1mj 2.5/ 2.7/ 3.1/ 4.4 Coochs Brdg(13) : White Clay Creek... DPKD1 1.6/ 1.7/ 1.9/ 2.5 :Delaware Pk (13ft) :DPKD1md 2.3/ 2.4/ 2.6/ 3.3 Delaware Pk (15) :DPKD1mj 3.3/ 3.5/ 3.8/ 4.9 Delaware Pk (16.5) : Red Clay Creek... RCCD1 1.9/ 2.1/ 2.4/ 2.8 :Wooddale (7ft) :RCCD1md 2.5/ 2.8/ 3.2/ 3.8 Wooddale (8.5) :RCCD1mj 3.2/ 3.5/ 3.9/ 4.8 Wooddale (10) .END :=============================================================== : EXPERIMENTAL NON-FCST POINT RAW MODEL OUTPUT : NO MANUAL QC OR ADJUSTMENTS APPLIED...USE WITH CAUTION :=============================================================== : : NWS BINGHAMTON SERVICE AREA... .B RHA 260822 Z DH00/DC2608220130/DUE/PPHCF/PPTCF/PPQCF/PPKCF :GageID 1hr 3hr 6hr 12hr rainfall for indicated stages : Lackawanna River... ARHP1 3.8/ 4.0/ 4.4/ 5.2 :Archbald (8ft) :ARHP1md 4.5/ 4.6/ 5.1/ 6.1 Archbald (9) :ARHP1mj 5.1/ 5.2/ 5.8/ 7.2 Archbald (10) PKIP1 4.3/ 4.4/ 4.6/ 5.1 :Scranton (12.5ft.) :PKIP1md 4.6/ 4.7/ 4.9/ 5.4 Scranton (14) :PKIP1mj 4.8/ 4.9/ 5.0/ 5.6 Scranton (15) .END : Model-simulated 3-hourly stage forecasts including QPF... .E ARHP1 20260822 DC2608220150/DH03/HGIFX/DIH3/ .E1 1.8/1.8/1.8/1.8/1.8/1.8/1.8/1.8 .E PKIP1 20260822 DC2608220150/DH03/HGIFX/DIH3/ .E1 1.2/1.1/1.1/1.1/1.1/1.1/1.1/1.1 $$ NNNN  893 FOUS71 KRHA 220150 FFHVA2 HEADWATER STATEMENT FOR THE POTOMAC AND JAMES BASINS MIDDLE ATLANTIC RIVER FORECAST CENTER NATIONAL WEATHER SERVICE STATE COLLEGE PA 930 PM EDT FRI AUG 21 2026 APPROXIMATE 1/3/6/12-HR BASIN AVERAGED RAINFALL (INCHES) REQUIRED TO CAUSE MINOR, MODERATE, AND MAJOR FLOODING AT THE INDICATED HEADWATER LOCATIONS. .B RHA 260822 Z DH00/DC2608220130/DUE/PPHCF/PPTCF/PPQCF/PPKCF : :IDENT 1HR 3HR 6HR 12HR HEADWATER NAME :======= ==== ==== ==== ==== ==================== : : NWS STERLING SERVICE AREA... : POTOMAC BASIN... : North Branch Potomac River... KITM2 2.1/ 2.3/ 2.8/ 3.5 :Kitzmiller (9ft) :KITM2md 2.9/ 3.3/ 4.1/ 5.5 Kitzmiller (11) :KITM2mj 4.3/ 4.8/ 6.2/ 8.0 Kitzmiller (13) : Georges Creek... WSTM2 1.2/ 1.4/ 1.7/ 2.0 :Westernport (8ft) :WSTM2md 1.9/ 2.1/ 2.5/ 2.9 Westernport (10) :WSTM2mj 2.5/ 2.9/ 3.3/ 3.9 Westernport (12) : South Branch Potomac River... FKLW2 2.2/ 2.4/ 2.7/ 3.3 :Franklin (7ft) :FKLW2md 2.3/ 2.6/ 2.9/ 3.9 Franklin (9) :FKLW2mj 2.5/ 2.9/ 3.3/ 4.5 Franklin (11) : Opequon Creek... MBGW2 2.5/ 3.3/ 3.7/ 4.8 :Martinsburg (10ft) :MBGW2md 2.7/ 3.5/ 4.0/ 5.6 Martinsburg (12.5) :MBGW2mj 3.1/ 3.9/ 4.8/ 6.5 Martinsburg (15) : South River... WAYV2 3.5/ 4.3/ 5.6/ 7.1 :Waynesboro (9.5ft) :WAYV2md 3.7/ 4.5/ 6.1/ 7.8 Waynesboro (11) :WAYV2mj 4.0/ 5.0/ 6.9/ 8.0 Waynesboro (13) : North Fork Shenandoah River... COOV2 2.5/ 2.9/ 3.7/ 4.5 :Cootes Store (15ft) :COOV2md 2.9/ 3.3/ 4.5/ 5.5 Cootes Store (18) :COOV2mj 3.4/ 3.9/ 5.4/ 6.6 Cootes Store (21) : Antietam Creek... SACM2 2.2/ 2.9/ 3.8/ 5.6 :Sharpsburg (8ft) :SACM2md 2.3/ 3.1/ 4.5/ 6.1 Sharpsburg (10) :SACM2mj 2.4/ 3.3/ 5.2/ 6.9 Sharpsburg (12) : Seneca Creek... DAWM2 2.5/ 2.6/ 3.0/ 3.7 :Dawsonville (7.5ft) :DAWM2md 3.0/ 3.5/ 4.7/ 6.0 Dawsonville (11) :DAWM2mj 5.0/ 5.9/ 7.4/ 8.0 Dawsonville (16) : : NWS BLACKSBURG SERVICE AREA... : Maury River... BVSV2 4.6/ 6.5/ 7.4/ 8.0 :Buena Vista (17ft) :BVSV2cs 4.2/ 5.5/ 7.0/ 8.0 Buena Vista (13) :BVSV2md 4.8/ 6.7/ 7.4/ 8.0 Buena Vista (19) :BVSV2mj 5.0/ 7.0/ 7.4/ 8.0 Buena Vista (21) .END : :=============================================================== : EXPERIMENTAL NON-FCST POINT RAW MODEL OUTPUT : NO MANUAL QC OR ADJUSTMENTS APPLIED...USE WITH CAUTION :=============================================================== : : NWS STERLING SERVICE AREA... : Rock Creek at Sherrill Drive.,Washington DC .B RHA 260822 Z DH00/DC2608220130/DUE/PPHCF/PPTCF/PPQCF/PPKCF :GageID 1hr 3hr 6hr 12hr rainfall for indicated stages RCKD2 1.7/ 1.9/ 2.0/ 2.4 :Washington, DC (7ft) :RCKD2md 2.3/ 2.6/ 2.9/ 3.5 Washington, DC (10) :RCKD2mj 3.1/ 3.4/ 3.8/ 4.6 Washington, DC (12) .END : Model-simulated 3-hourly stage forecasts including QPF... .E RCKD2 20260822 DC2608220150/DH03/HGIFX/DIH3/ .E1 2.0/2.0/2.0/2.1/2.3/2.7/2.9/3.3 $$ NNNN  258 FOUS73 KMSR 220200 FFHMKX HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 900 PM CDT FRI AUG 21 2026 MILWAUKEE HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH00/DC2608220200 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** WISCONSIN HEADWATER POINTS *** : AFTW3 1.8/ 2.3/ 2.8 :AFTON WI ROCK R BCHW3 1.8/ 2.0/ 2.3 :BLANCHARDVILLE WI E BR PECATONICA R BUNW3 2.3/ 2.5/ 3.0 :BUNCOMBE WI GALENA R DARW3 2.3/ 2.5/ 3.2 :DARLINGTON WI PECATONICA R MTNW3 1.6/ 1.8/ 2.7 :MARTINTOWN WI PECATONICA R MAZW3 2.0/ 2.2/ 2.8 :MAZOMANIE WI BLACK EARTH CR KINW3 2.8/ 3.4/ 4.2 :MILWAUKEE WI KINNICKINNIC R SEBW3 2.6/ 2.8/ 3.4 :SHEBOYGAN WI SHEBOYGAN R WKEW3 3.0/ 3.1/ 3.1 :WAUKESHA WI FOX R WWTW3 3.1/ 3.3/ 3.6 :WAUWATOSA WI MENOMONEE R BLOW3 1.4/ 1.6/ 1.8 :BELOIT WI TURTLE CR MFSW3 0.5/ 1.0/ 1.0 :MENOMONEE FALLS WI MENOMONEE R OAKW3 1.9/ 2.0/ 2.5 :SOUTH MILWAUKEE OAK CR .END $$  259 FOUS73 KMSR 220200 FFHFGF HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 900 PM CDT FRI AUG 21 2026 GRAND FORKS HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH00/DC2608220200 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** MINNESOTA HEADWATER POINTS *** : CSRM5 3.5/ 3.9/ 4.1 :CAMPBELL MN 1W SO FK RABBIT R MALM5 3.5/ 3.8/ 4.4 :MALUNG MN 2NW ROSEAU R BLO SO FK : : *** NORTH DAKOTA HEADWATER POINTS *** : DWGN8 3.5/ 4.0/ 4.5 :DWIGHT ND 1NE ANTELOPE CR HGRN8 3.5/ 4.0/ 4.5 :HILLSBORO ND GOOSE R LTRN8 2.5/ 2.7/ 3.0 :LARIMORE ND 5ENE TURTLE R .END $$  260 FOUS73 KMSR 220200 FFHLOT HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 900 PM CDT FRI AUG 21 2026 CHICAGO HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH00/DC2608220200 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** ILLINOIS HEADWATER POINTS *** : NBPI2 2.5/ 2.5/ 2.8 :CHICAGO IL N BR CHICAGO R CDCI2 0.9/ 1.2/ 1.4 :CHICAGO HEIGHTS IL DEER CR DRFI2 2.3/ 2.7/ 3.7 :DEERFIELD IL N BR CHICAGO R DEKI2 3.5/ 4.0/ 4.5 :DE KALB IL S BR KISHWAUKEE R DSPI2 2.9/ 3.0/ 3.1 :DES PLAINES IL DES PLAINES R WLRI2 2.9/ 3.3/ 3.7 :DES PLAINES IL WELLER CR EMHI2 2.6/ 3.0/ 3.4 :ELMHURST IL SALT CR FLSI2 1.0/ 1.3/ 1.6 :FLOSSMOOR IL BUTTERFIELD CR GLWI2 1.3/ 1.7/ 2.0 :GLENWOOD IL THORN CR GUNI2 2.4/ 2.4/ 2.4 :GURNEE IL DES PLAINES R JHCI2 2.3/ 2.5/ 2.7 :JOLIET IL HICKORY CR LAFI2 2.3/ 2.7/ 3.7 :LAKE FOREST IL SKOKIE R NILI2 3.4/ 4.0/ 4.5 :NILES IL N BR CHICAGO R NBRI2 3.5/ 4.0/ 4.5 :NORTHBROOK IL W FK N BR CHICAGO R OAKI2 2.9/ 3.0/ 3.4 :OAK FOREST IL MIDLOTHIAN CR MCDI2 3.2/ 3.5/ 3.9 :PROSPECT HTS IL MCDONALD CR ALPI2 1.5/ 1.6/ 1.8 :ROCKFORD IL ALPINE DAM-KEITH CR LEVI2 1.8/ 2.1/ 2.6 :ROCKFORD IL LEVINGS LAKE PPLI2 1.9/ 2.3/ 2.8 :ROCKFORD IL PAGE PARK LAKE ROLI2 2.8/ 3.2/ 3.6 :ROLLING MEADOWS IL SALT CR SCHI2 3.4/ 3.8/ 4.4 :ST CHARLES IL FERSON CR SORI2 3.5/ 3.5/ 3.7 :SHOREWOOD IL DU PAGE R THNI2 1.2/ 1.2/ 1.1 :THORNTON IL THORN CR WHEI2 2.8/ 3.0/ 3.3 :WHEELING IL BUFFALO CR WLSI2 3.5/ 4.0/ 4.5 :WILLOW SPRINGS IL FLAG CR YRKI2 2.5/ 2.5/ 2.5 :YORKVILLE IL BLACKBERRY CR : : *** INDIANA HEADWATER POINTS *** : HDDI3 3.5/ 4.0/ 4.5 :DYER IN HART DITCH MNTI3 3.3/ 3.3/ 3.4 :MUNSTER IN HART DITCH LCMI3 2.6/ 2.5/ 2.6 :MUNSTER IN LITTLE CALUMET R PRTI3 1.9/ 1.9/ 1.9 :PORTER IN LITTLE CALUMET R .END $$  261 FOUS73 KMSR 220200 FFHLSX HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 900 PM CDT FRI AUG 21 2026 ST LOUIS HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH00/DC2608220200 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** MISSOURI HEADWATER POINTS *** : EWNM7 2.9/ 3.3/ 3.7 :EWING MO 5E NORTH FABIUS R EWMM7 3.0/ 3.3/ 3.7 :EWING MO 1NNE MIDDLE FABIUS R PALM7 1.7/ 1.9/ 2.2 :PALMYRA MO NORTH R TAYM7 1.7/ 2.2/ 2.8 :TAYLOR MO S FABIUS R PMZM7 2.2/ 2.6/ 3.0 :HOLLIDAY MO 2N MI FK SALT R TRYM7 1.5/ 1.6/ 1.8 :TROY MO CUIVRE R DRCM7 1.9/ 2.0/ 2.1 :ST PETERS MO DARDENNE CR LSLM7 2.0/ 2.2/ 2.5 :LAKE SAINT LOUIS PERUQUE CR - ABOVE LSTM7 1.6/ 1.7/ 2.0 :LAKE ST LOUIS MO PERUQUE CR CSNM7 1.4/ 1.5/ 1.6 :COOK STATION MO 1N MERAMEC R SEEM7 1.3/ 1.5/ 1.8 :STEELVILLE MO 2N MERAMEC R UNNM7 3.0/ 3.2/ 3.4 :UNION MO BOURBEUSE R BYRM7 2.6/ 3.1/ 3.5 :BYRNESVILLE MO 2NNE BIG R .END $$  262 FOUS73 KMSR 220200 FFHARX HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 900 PM CDT FRI AUG 21 2026 LA CROSSE HYDRLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH00/DC2608220200 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** IOWA HEADWATER POINTS *** : DEHI4 3.5/ 4.0/ 4.5 :DECORAH IA UPPER IOWA R DCHI4 2.7/ 3.0/ 3.6 :DORCHESTER IA UPPER IOWA R GRBI4 2.2/ 2.4/ 2.6 :GARBER IA TURKEY R : : *** MINNESOTA HEADWATER POINTS *** : ASTM5 2.3/ 2.6/ 2.9 :AUSTIN WWTP MN CEDAR R DOBM5 2.8/ 2.9/ 3.1 :AUSTIN MN-21ST DOBBINS CR TRCM5 3.2/ 3.5/ 4.2 :AUSTIN MN-41 AV NW TURTLE CR HOUM5 2.1/ 2.3/ 2.8 :HOUSTON MN ROOT R LNSM5 3.0/ 3.4/ 3.9 :LANESBORO MN S BR ROOT R LANM5 2.8/ 3.0/ 3.3 :LANSING MN CEDAR R PTNM5 3.0/ 3.3/ 4.0 :PRESTON MN S BR ROOT R RBCM5 3.5/ 3.9/ 4.4 :ROCHESTER MN BEAR CR RCCM5 3.3/ 3.5/ 4.2 :ROCHESTER MN CASCADE CR ROCM5 3.5/ 3.9/ 4.5 :ROCHESTER MN SILVER CR RCSM5 3.5/ 4.0/ 4.5 :HWY 14 ROCHESTER S FK ZUMBRO R RCHM5 3.3/ 3.9/ 4.5 :ROCHESTER MN S FK ZUMBRO R WSPM5 2.8/ 3.0/ 3.7 :WHITEWATER ST.PK MFK WHITEWATER R ZUMM5 3.3/ 4.0/ 4.5 :ZUMBRO FALLS MN ZUMBRO R : : *** WISCONSIN HEADWATER POINTS *** : BTNW3 2.0/ 2.1/ 2.1 :BURTON WI GRANT R DDGW3 3.5/ 3.5/ 3.6 :DODGE WI TREMPEALEAU R GMIW3 3.1/ 3.3/ 3.7 :GAYS MILLS WI KICKAPOO R HILW3 1.9/ 2.0/ 2.2 :HILLSBORO WWTP WI S BR BARABOO R LAFW3 2.4/ 2.6/ 2.7 :LA FARGE WI KICKAPOO R NEIW3 2.6/ 3.4/ 4.2 :NEILLSVILLE WI BLACK R ONTW3 2.4/ 2.5/ 2.6 :ONTARIO WI KICKAPOO R REAW3 2.7/ 2.9/ 3.0 :READSTOWN WI KICKAPOO R RVLW3 2.7/ 2.9/ 3.1 :ROCKVILLE WI 2E PLATTE R SOGW3 2.6/ 2.6/ 2.7 :SOLDIERS GROVE WI KICKAPOO R STEW3 2.8/ 2.9/ 3.0 :STEUBEN WI KICKAPOO R VIOW3 2.5/ 2.6/ 2.7 :VIOLA WI KICKAPOO R .END $$  263 FOUS73 KMSR 220200 FFHMPX HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 900 PM CDT FRI AUG 21 2026 TWIN CITIES HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH00/DC2608220200 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** MINNESOTA HEADWATER POINTS *** : SNCM5 2.5/ 2.7/ 2.9 :JORDAN MN SAND CR PNLM5 3.1/ 3.7/ 4.5 :PINE ISLAND MN MID FK ZUMBRO R PILM5 3.5/ 4.0/ 4.5 :PINE ISLAND MN N B MID FK ZUMBRO R WGOM5 3.5/ 4.0/ 4.5 :WANAMINGO MN NO FK ZUMBRO R .END $$  264 FOUS73 KMSR 220200 FFHAPX HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 900 PM CDT FRI AUG 21 2026 GAYLORD HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH00/DC2608220200 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** MICHIGAN HEADWATER POINTS *** : BVTM4 3.5/ 4.0/ 4.5 :BEAVERTON MI TOBACCO R MYFM4 3.5/ 4.0/ 4.3 :MAYFIELD MI BOARDMAN R RUDM4 3.5/ 4.0/ 4.5 :RUDYARD MI PINE RIVER .END $$  267 FOUS73 KMSR 220200 FFHILX HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 900 PM CDT FRI AUG 21 2026 LINCOLN HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH00/DC2608220200 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** ILLINOIS HEADWATER POINTS *** : BMII2 3.5/ 4.0/ 4.5 :BLOOMINGTON IL SUGAR CR RLLI2 0.5/ 1.0/ 1.0 :ROWELL IL SALT CR .END $$  268 FOUS73 KMSR 220200 FFHDMX HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 900 PM CDT FRI AUG 21 2026 DES MOINES HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH00/DC2608220200 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** IOWA HEADWATER POINTS *** : AKWI4 2.8/ 2.9/ 3.0 :ACKWORTH IA SOUTH R AMWI4 2.8/ 2.9/ 3.0 :AMES IA IOWAY CR BSSI4 2.7/ 2.8/ 3.1 :BUSSEY IA CEDAR CR DFMI4 3.3/ 3.4/ 3.5 :DSM-EASTON FOUR MILE CR CLVI4 2.5/ 2.8/ 3.0 :CLIVE I-80/35 WALNUT CR DOSI4 2.7/ 2.8/ 3.2 :DSM-63RD ST WALNUT CR MCWI4 3.5/ 3.7/ 4.1 :MASON CITY IA WINNEBAGO R .END $$  759 FOUS71 KRHA 220750 FFHNJ1 HEADWATER STATEMENT FOR NEW JERSEY STREAMS MIDDLE ATLANTIC RIVER FORECAST CENTER NATIONAL WEATHER SERVICE STATE COLLEGE PA 330 AM EDT SAT AUG 22 2026 APPROXIMATE 1/3/6/12-HR BASIN AVERAGED RAINFALL (INCHES) REQUIRED TO CAUSE MINOR, MODERATE, AND MAJOR FLOODING AT THE INDICATED HEADWATER LOCATIONS. .B RHA 260822 Z DH06/DC2608220730/DUE/PPHCF/PPTCF/PPQCF/PPKCF : :IDENT 1HR 3HR 6HR 12HR HEADWATER NAME STREAM :======= ==== ==== ==== ==== ==================== ================== : : NWS BROOKHAVEN SERVICE AREA... : Ramapo River... MAWN4 2.0/ 2.3/ 2.8/ 3.1 :Mahwah (8ft) Ramapo River :MAWN4md 2.3/ 2.6/ 3.2/ 3.7 Mahwah (9) Ramapo River :MAWN4mj 3.3/ 3.8/ 4.8/ 5.4 Mahwah (12) Ramapo River : Hohokus Brook... HOHN4 1.0/ 1.1/ 1.5/ 2.3 :Ho-Ho-Kus (3ft) Hohokus Brook : Saddle River... LODN4 1.1/ 1.1/ 1.3/ 1.9 :Lodi (5.5ft) Saddle River :LODN4md 1.6/ 1.6/ 1.8/ 2.6 Lodi (7) Saddle River :LODN4mj 1.9/ 1.9/ 2.2/ 3.1 Lodi (8) Saddle River : Rahway River... SPGN4 1.5/ 1.5/ 1.6/ 2.0 :Springfield (5.5ft) Rahway River : : NWS MT. HOLLY SERVICE AREA... : PASSAIC BASIN... : Passaic River... CAMN4 2.5/ 2.6/ 3.4/ 3.7 :Chatham (6ft) Passaic River :CAMN4md 4.7/ 4.8/ 5.5/ 6.1 Chatham (7.2) Passaic River :CAMN4mj 5.3/ 5.6/ 6.5/ 7.3 Chatham (8.2) Passaic River : Rockaway River... BOTN4 3.6/ 4.0/ 4.5/ 5.4 :Boonton Abv. (5ft) Rockaway River :BOTN4md 4.0/ 4.6/ 5.2/ 6.5 Boonton Abv. (6) Rockaway River :BOTN4mj 4.3/ 5.0/ 5.7/ 7.1 Boonton Abv. (7) Rockaway River : Whippany River... WHIN4 2.0/ 2.2/ 2.5/ 2.7 :Morristown (6ft) Whippany River : RARITAN BASIN.. : South Branch Raritan River... STTN4 2.2/ 2.4/ 2.9/ 3.2 :Stanton (8ft) S. Br. Raritan River :STTN4md 2.4/ 2.6/ 3.4/ 4.0 Stanton (10) S. Br. Raritan River :STTN4mj 2.6/ 2.8/ 4.1/ 4.7 Stanton (12) S. Br. Raritan River : North Branch Raritan River... RRTN4 1.8/ 2.1/ 2.4/ 2.9 :Raritan (10ft) N. Br. Raritan River :RRTN4md 2.0/ 2.3/ 2.9/ 3.6 Raritan (12) N. Br. Raritan River :RRTN4mj 2.4/ 2.8/ 3.6/ 4.5 Raritan (15) N. Br. Raritan River : Millstone River... BKWN4 2.9/ 3.2/ 3.5/ 3.5 :Blackwells Mills(9ft) Millstone River :BKWN4md 3.0/ 3.2/ 3.6/ 3.6 Blackwells Mills(10) Millstone River :BKWN4mj 3.4/ 3.7/ 4.1/ 4.9 Blackwells Mills(15) Millstone River : DELAWARE BASIN... : Assunpink Creek...TACN4 2.1/ 2.2/ 2.7/ 3.2 :Trenton (8.5ft) Assunpink Creek :TACN4md 2.2/ 2.4/ 3.3/ 3.6 Trenton (9.5) Assunpink Creek :TACN4mj 2.3/ 2.7/ 3.6/ 4.2 Trenton (11) Assunpink Creek .END $$ NNNN $$ NNNN  760 FOUS71 KRHA 220750 FFHPA2 HEADWATER STATEMENT FOR THE DELAWARE AND SUSQUEHANNA BASINS MIDDLE ATLANTIC RIVER FORECAST CENTER NATIONAL WEATHER SERVICE STATE COLLEGE PA 330 AM EDT SAT AUG 22 2026 APPROXIMATE 1/3/6/12-HR BASIN AVERAGED RAINFALL (INCHES) REQUIRED TO CAUSE MINOR, MODERATE, AND MAJOR FLOODING AT THE INDICATED HEADWATER LOCATIONS. .B RHA 260822 Z DH06/DC2608220730/DUE/PPHCF/PPTCF/PPQCF/PPKCF : :IDENT 1HR 3HR 6HR 12HR HEADWATER NAME :======= ==== ==== ==== ==== ==================== : : NWS BINGHAMTON SERVICE AREA... : SUSQUEHANNA BASIN... : Tioughnioga River... CRTN6 2.5/ 2.8/ 3.2/ 3.5 :Cortland (8ft) :CRTN6md 2.7/ 3.0/ 4.0/ 4.3 Cortland (10) :CRTN6mj 2.9/ 3.4/ 4.4/ 5.0 Cortland (12.5) : Chenango River... SHBN6 2.6/ 2.9/ 3.0/ 3.6 :Sherburne (8.5ft) :SHBN6md 2.7/ 3.0/ 3.3/ 4.3 Sherburne (9) :SHBN6mj 2.8/ 3.1/ 3.8/ 4.7 Sherburne (10.6) : Otselic River... CINN6 3.0/ 3.2/ 3.7/ 4.6 :Cincinnatus (9ft) : ...moderate and major flood stages above rating table. : Cohocton River... CMPN6 2.9/ 3.1/ 3.7/ 4.4 :Campbell (8ft) :CMPN6md 3.0/ 3.4/ 4.5/ 5.1 Campbell (10) :CMPN6mj 3.2/ 3.7/ 5.0/ 5.7 Campbell (11) : Canisteo River... WCRN6 2.1/ 2.4/ 3.0/ 3.8 :West Cameron (17ft) :WCRN6md 2.2/ 2.5/ 3.2/ 4.0 West Cameron (18) :WCRN6mj 2.5/ 2.8/ 3.7/ 4.8 West Cameron (21) : Towanda Creek... MONP1 1.8/ 1.9/ 2.4/ 3.0 :Monroeton (15.5ft) :MONP1md 1.9/ 2.1/ 2.6/ 3.3 Monroeton (17) :MONP1mj 2.2/ 2.4/ 3.0/ 3.9 Monroeton (18.5) : Tunkhannock Creek... TNKP1 2.3/ 2.8/ 4.0/ 4.7 :Tunkhannock (11ft) :TNKP1md 2.5/ 3.0/ 4.4/ 5.3 Tunkhannock (14) :TNKP1mj 2.7/ 3.4/ 4.9/ 5.9 Tunkhannock (17) : Lackawanna River... OFRP1 2.3/ 2.7/ 3.4/ 4.5 :Old Forge (11ft) :OFRP1md 2.4/ 2.9/ 3.6/ 4.8 Old Forge (13) :OFRP1mj 2.6/ 3.1/ 3.9/ 5.2 Old Forge (16) : DELAWARE BASIN... : East Branch Delaware River... MRGN6 3.6/ 4.0/ 4.5/ 5.1 :Margaretville (11ft) :MRGN6md 4.3/ 4.7/ 5.5/ 6.2 Margaretville (12) :MRGN6mj 5.0/ 5.6/ 6.6/ 7.7 Margaretville (13) : West Branch Delaware River... WALN6 2.5/ 2.6/ 2.9/ 3.4 :Walton (11.5ft) :WALN6md 2.8/ 3.1/ 3.5/ 3.9 Walton (14) :WALN6mj 3.4/ 3.7/ 4.2/ 4.8 Walton (16) : Beaverkill Creek... CKFN6 1.8/ 1.9/ 2.2/ 2.7 :Cooks Falls (10ft) :CKFN6md 2.6/ 2.8/ 3.6/ 4.6 Cooks Falls (16) :CKFN6mj 3.0/ 3.3/ 4.3/ 5.7 Cooks Falls (18) : Lackawaxen River... HWYP1 2.4/ 2.7/ 3.3/ 4.1 :Hawley (14ft) :HWYP1md 3.1/ 3.5/ 4.3/ 5.4 Hawley (20) :HWYP1mj 3.4/ 3.8/ 4.7/ 5.9 Hawley (22) : : NWS STATE COLLEGE SERVICE AREA... : SUSQUEHANNA BASIN... : Tioga River... MFDP1 1.8/ 2.4/ 3.4/ 4.1 :Mansfield (12ft) :MFDP1md 2.0/ 2.6/ 3.8/ 4.5 Mansfield (13) :MFDP1mj 2.1/ 2.9/ 4.3/ 5.1 Mansfield (14) : Penns Creek... PNCP1 2.7/ 3.0/ 3.1/ 3.5 :Penns Creek (8ft) :PNCP1md 2.8/ 3.2/ 3.6/ 4.5 Penns Creek (10) :PNCP1mj 3.1/ 3.6/ 4.4/ 5.4 Penns Creek (12) : Frankstown Branch Juniata River... WIBP1 1.7/ 1.9/ 2.2/ 2.2 :Williamsburg (12ft) :WIBP1md 1.8/ 2.0/ 2.3/ 2.4 Williamsburg (13) :WIBP1mj 1.8/ 2.0/ 2.5/ 2.9 Williamsburg (15) : Little Juniata River... SPKP1 1.5/ 1.6/ 1.7/ 1.8 :Spruce Creek (8ft) :SPKP1md 1.7/ 1.7/ 2.0/ 2.1 Spruce Creek (10) :SPKP1mj 2.1/ 2.2/ 2.6/ 3.0 Spruce Creek (14) : Aughwick Creek... SLYP1 1.5/ 1.6/ 1.8/ 2.1 :Shirleysburg (10ft) :SLYP1md 1.7/ 1.8/ 2.1/ 2.5 Shirleysburg (12) :SLYP1mj 3.9/ 4.2/ 5.0/ 6.8 Shirleysburg (20) : Sherman Creek... SMDP1 2.2/ 2.5/ 3.0/ 3.6 :Shermans Dale (9ft) :SMDP1md 2.5/ 2.9/ 3.5/ 4.1 Shermans Dale (11) :SMDP1mj 3.9/ 4.5/ 5.4/ 6.2 Shermans Dale (16) : Conodoguinet Creek... HGSP1 3.2/ 3.3/ 3.5/ 3.5 :Hogestown (8ft) :HGSP1md 3.4/ 3.7/ 4.4/ 4.9 Hogestown (10) :HGSP1mj 3.7/ 4.2/ 5.1/ 5.8 Hogestown (12) : Yellow Breeches Creek... CPHP1 1.8/ 2.1/ 2.5/ 3.9 :Camp Hill (7ft) :CPHP1md 1.9/ 2.3/ 2.8/ 4.2 Camp Hill (9) :CPHP1mj 2.4/ 2.9/ 3.8/ 5.3 Camp Hill (13) : Swatara Creek... HTVP1 1.9/ 2.4/ 2.9/ 4.2 :Harper Tavern (9ft) :HTVP1md 2.2/ 2.8/ 3.6/ 5.1 Harper Tavern (12) :HTVP1mj 2.6/ 3.3/ 4.2/ 5.9 Harper Tavern (15) : Conestoga River... LNCP1 1.7/ 2.0/ 2.1/ 3.1 :Lancaster (11ft) :LNCP1md 1.8/ 2.2/ 2.4/ 3.4 Lancaster (13) :LNCP1mj 2.0/ 2.4/ 2.8/ 3.8 Lancaster (15) : DELAWARE BASIN... : Schuylkill River... LGVP1 2.6/ 2.7/ 2.8/ 3.0 :Landingville (8ft) :LGVP1md 3.4/ 3.6/ 3.8/ 4.2 Landingville (12) :LGVP1mj 4.1/ 4.5/ 4.8/ 5.3 Landingville (14) : : NWS MT. HOLLY SERVICE AREA... : DELAWARE BASIN... : Schuylkill River... BREP1 2.9/ 3.8/ 4.7/ 6.0 :Berne (12ft) :BREP1md 3.2/ 4.2/ 5.3/ 6.9 Berne (14) :BREP1mj 3.6/ 4.7/ 5.8/ 7.6 Berne (16) : Bush Kill... SHOP1 2.6/ 3.2/ 3.5/ 3.5 :Shoemakers (6ft) :SHOP1md 2.8/ 3.4/ 4.0/ 4.5 Shoemakers (7) :SHOP1mj 3.0/ 3.6/ 4.5/ 5.1 Shoemakers (8) : Brodhead Creek... MNSP1 1.8/ 2.2/ 2.8/ 3.7 :Minisink Hills(10ft) :MNSP1md 1.9/ 2.3/ 3.2/ 4.1 Minisink Hills(12) :MNSP1mj 2.2/ 2.7/ 3.7/ 4.8 Minisink Hills(15) : Little Lehigh Creek...APAP1 4.3/ 4.6/ 5.1/ 6.0 :Allentown-10th (8ft) :APAP1md 5.3/ 5.7/ 6.3/ 7.6 Allentown-10th (10) :APAP1mj 6.3/ 6.8/ 7.4/ 8.0 Allentown-10th (12) : Perkiomen Creek... GRAP1 1.7/ 2.1/ 2.8/ 3.4 :Graterford (11ft) :GRAP1md 1.9/ 2.3/ 3.2/ 3.8 Graterford (13) :GRAP1mj 2.2/ 2.7/ 3.8/ 4.5 Graterford (16) : Neshaminy Creek... LNGP1 2.4/ 2.4/ 2.4/ 2.4 :Langhorne (9ft) :LNGP1md 2.7/ 2.7/ 3.0/ 3.0 Langhorne (10) :LNGP1mj 2.8/ 3.0/ 3.4/ 3.7 Langhorne (12) : Chester Creek... CHSP1 1.7/ 1.8/ 2.0/ 2.6 :Chester (8ft) :CHSP1md 2.2/ 2.3/ 2.6/ 3.3 Chester (10) :CHSP1mj 3.1/ 3.2/ 3.7/ 4.6 Chester (14) : West Branch Brandywine Creek... MODP1 3.8/ 4.0/ 4.3/ 4.5 :Modena (9ft) :MODP1md 4.3/ 4.6/ 5.0/ 5.2 Modena (10) :MODP1mj 6.5/ 7.0/ 7.4/ 8.0 Modena (12) : East Branch Brandywine Creek... DWNP1 1.1/ 1.1/ 1.1/ 1.2 :Downingtown (7ft) :DWNP1md 1.7/ 1.8/ 1.9/ 2.1 Downingtown (9) :DWNP1mj 2.6/ 2.6/ 2.8/ 3.1 Downingtown (11) : Brandywine Creek... CDFP1 2.0/ 2.0/ 2.1/ 2.3 :Chadds Ford (9ft) :CDFP1md 2.2/ 2.3/ 2.6/ 3.3 Chadds Ford (11) :CDFP1mj 2.4/ 2.6/ 3.3/ 4.1 Chadds Ford (13) : Christina River... CHBD1 1.5/ 1.6/ 1.9/ 2.7 :Coochs Brdg(11ft) :CHBD1md 1.8/ 2.0/ 2.4/ 3.4 Coochs Brdg(12) :CHBD1mj 2.5/ 2.7/ 3.2/ 4.4 Coochs Brdg(13) : White Clay Creek... DPKD1 1.6/ 1.7/ 1.9/ 2.5 :Delaware Pk (13ft) :DPKD1md 2.3/ 2.4/ 2.6/ 3.4 Delaware Pk (15) :DPKD1mj 3.4/ 3.6/ 3.9/ 4.9 Delaware Pk (16.5) : Red Clay Creek... RCCD1 1.9/ 2.1/ 2.4/ 2.9 :Wooddale (7ft) :RCCD1md 2.6/ 2.8/ 3.2/ 3.8 Wooddale (8.5) :RCCD1mj 3.3/ 3.6/ 4.0/ 4.8 Wooddale (10) .END :=============================================================== : EXPERIMENTAL NON-FCST POINT RAW MODEL OUTPUT : NO MANUAL QC OR ADJUSTMENTS APPLIED...USE WITH CAUTION :=============================================================== : : NWS BINGHAMTON SERVICE AREA... .B RHA 260822 Z DH06/DC2608220730/DUE/PPHCF/PPTCF/PPQCF/PPKCF :GageID 1hr 3hr 6hr 12hr rainfall for indicated stages : Lackawanna River... ARHP1 3.9/ 4.0/ 4.4/ 5.2 :Archbald (8ft) :ARHP1md 4.5/ 4.6/ 5.1/ 6.2 Archbald (9) :ARHP1mj 5.1/ 5.3/ 5.9/ 7.2 Archbald (10) PKIP1 4.3/ 4.4/ 4.6/ 5.1 :Scranton (12.5ft.) :PKIP1md 4.6/ 4.7/ 4.9/ 5.4 Scranton (14) :PKIP1mj 4.8/ 4.9/ 5.1/ 5.6 Scranton (15) .END : Model-simulated 3-hourly stage forecasts including QPF... .E ARHP1 20260822 DC2608220750/DH09/HGIFX/DIH3/ .E1 1.8/1.8/1.8/1.8/1.8/1.8/1.8/1.8 .E PKIP1 20260822 DC2608220750/DH09/HGIFX/DIH3/ .E1 1.1/1.1/1.1/1.1/1.1/1.1/1.1/1.1 $$ NNNN  762 FOUS71 KRHA 220750 FFHVA2 HEADWATER STATEMENT FOR THE POTOMAC AND JAMES BASINS MIDDLE ATLANTIC RIVER FORECAST CENTER NATIONAL WEATHER SERVICE STATE COLLEGE PA 330 AM EDT SAT AUG 22 2026 APPROXIMATE 1/3/6/12-HR BASIN AVERAGED RAINFALL (INCHES) REQUIRED TO CAUSE MINOR, MODERATE, AND MAJOR FLOODING AT THE INDICATED HEADWATER LOCATIONS. .B RHA 260822 Z DH06/DC2608220730/DUE/PPHCF/PPTCF/PPQCF/PPKCF : :IDENT 1HR 3HR 6HR 12HR HEADWATER NAME :======= ==== ==== ==== ==== ==================== : : NWS STERLING SERVICE AREA... : POTOMAC BASIN... : North Branch Potomac River... KITM2 2.2/ 2.4/ 2.8/ 3.6 :Kitzmiller (9ft) :KITM2md 3.0/ 3.3/ 4.1/ 5.5 Kitzmiller (11) :KITM2mj 4.3/ 4.9/ 6.3/ 8.0 Kitzmiller (13) : Georges Creek... WSTM2 1.3/ 1.4/ 1.7/ 2.0 :Westernport (8ft) :WSTM2md 1.9/ 2.2/ 2.5/ 2.9 Westernport (10) :WSTM2mj 2.5/ 2.9/ 3.3/ 3.9 Westernport (12) : South Branch Potomac River... FKLW2 2.2/ 2.4/ 2.7/ 3.4 :Franklin (7ft) :FKLW2md 2.4/ 2.7/ 3.0/ 3.9 Franklin (9) :FKLW2mj 2.6/ 3.0/ 3.3/ 4.6 Franklin (11) : Opequon Creek... MBGW2 2.6/ 3.3/ 3.7/ 4.8 :Martinsburg (10ft) :MBGW2md 2.7/ 3.5/ 4.1/ 5.6 Martinsburg (12.5) :MBGW2mj 3.1/ 4.0/ 4.8/ 6.6 Martinsburg (15) : South River... WAYV2 3.5/ 4.3/ 5.6/ 7.1 :Waynesboro (9.5ft) :WAYV2md 3.7/ 4.6/ 6.1/ 7.8 Waynesboro (11) :WAYV2mj 4.1/ 5.0/ 6.9/ 8.0 Waynesboro (13) : North Fork Shenandoah River... COOV2 2.6/ 2.9/ 3.8/ 4.5 :Cootes Store (15ft) :COOV2md 3.0/ 3.4/ 4.6/ 5.5 Cootes Store (18) :COOV2mj 3.5/ 3.9/ 5.5/ 6.7 Cootes Store (21) : Antietam Creek... SACM2 2.2/ 2.9/ 3.8/ 5.6 :Sharpsburg (8ft) :SACM2md 2.3/ 3.1/ 4.5/ 6.1 Sharpsburg (10) :SACM2mj 2.5/ 3.4/ 5.3/ 6.9 Sharpsburg (12) : Seneca Creek... DAWM2 2.5/ 2.7/ 3.1/ 3.7 :Dawsonville (7.5ft) :DAWM2md 3.1/ 3.5/ 4.8/ 6.0 Dawsonville (11) :DAWM2mj 5.0/ 5.9/ 7.4/ 8.0 Dawsonville (16) : : NWS BLACKSBURG SERVICE AREA... : Maury River... BVSV2 4.6/ 6.5/ 7.4/ 8.0 :Buena Vista (17ft) :BVSV2cs 4.2/ 5.6/ 7.0/ 8.0 Buena Vista (13) :BVSV2md 4.8/ 6.8/ 7.4/ 8.0 Buena Vista (19) :BVSV2mj 5.1/ 7.0/ 7.4/ 8.0 Buena Vista (21) .END : :=============================================================== : EXPERIMENTAL NON-FCST POINT RAW MODEL OUTPUT : NO MANUAL QC OR ADJUSTMENTS APPLIED...USE WITH CAUTION :=============================================================== : : NWS STERLING SERVICE AREA... : Rock Creek at Sherrill Drive.,Washington DC .B RHA 260822 Z DH06/DC2608220730/DUE/PPHCF/PPTCF/PPQCF/PPKCF :GageID 1hr 3hr 6hr 12hr rainfall for indicated stages RCKD2 1.7/ 1.9/ 2.0/ 2.5 :Washington, DC (7ft) :RCKD2md 2.4/ 2.6/ 2.9/ 3.6 Washington, DC (10) :RCKD2mj 3.2/ 3.5/ 3.9/ 4.7 Washington, DC (12) .END : Model-simulated 3-hourly stage forecasts including QPF... .E RCKD2 20260822 DC2608220750/DH09/HGIFX/DIH3/ .E1 2.0/2.1/2.3/2.7/2.9/3.3/3.5/3.1 $$ NNNN  515 AWUS01 KWNH 221111 FFGMPD OKZ000-KSZ000-221630- Mesoscale Precipitation Discussion 1109 NWS Weather Prediction Center College Park MD 710 AM EDT Sat Aug 22 2026 Areas affected...Central Oklahoma...South-Central Kansas... Concerning...Heavy rainfall...Flash flooding possible Valid 221110Z - 221630Z SUMMARY...Narrow band of slow moving elevated storms with favorable orientation for possible repeating along the I-35 corridor places a few urban centers at risk of possible localized flash flooding this morning. DISCUSSION...GOES-E 10.3um and regional RADAR shows expanding line of scattered cooling tops oriented favorably along/near the I-35 corridor from south-central KS into Central OK. Tops have been cooling fairly quickly nearing -70C aligned with core of deep layer moisture but also conditionally unstable air with spine of 2000 J/kg MUCAPE and 1.5-1.75" total PWat. CIRA LPW animation of Sfc-850 and 850-700mb layers show this weakly curved arc of enhanced moisture. Low level flow is generally parallel to the band through 850mb, though 700mb westerly flow is more orthogonal to the moisture/instability axis likely convergent near the base of the elevated instability within the vertical profile to seed the scattered development. Low level southerly to south-southwesterly inflow response likely further helped to deepen the vertical depth of the cells, so given the shear though the layer; cell motions have been slow. Additionally, while the RAP shows some modest divergence aloft, animation of GOES-E WV shows a very tight anticyclonic ridge axis through western OK; likely providing greater than analyzed divergence for further vertical ascent and outflow for some weak organization and maintenance of the updrafts. So many conditional elements have come together for greater than forecast convective development this morning per Hi-Res CAM suite. While the 09z RRFS has backed off, the 06z run was more in line with this evolution and given the natural bias of the RRFS to be a bit more aggressive with convective initiation in a capped environment (relative to other CAMs, esp. the HRRR), this seems to be a solution to provide some guidance in the near-term. Given the instability, rates and 15-20kts of 700mb flow (as well as southerly 20+kts of boundary layer inflow), moisture flux is supporting 1.75-2"/hr rates. However, the weak inflow and veered profile does hint at weaker overall deep layer convergence, so updrafts are a bit narrower than ideal for repeating training. Still, the 700-400mb steering flow along the shortwave ridging in W OK, may allow for some locations for repeating, though slow cell motions will likely be the best way to result in increased residency for spots of 2-4" totals. Given the recent dry conditions FFG values are higher with exception of north-central OK where 3hr values are 2-2.5" compared to 3-4"+ further south. Still, the placement of the line is nearly directly along I-35 and places larger urban centers in proximity from Wichita to Ponca City/Stillwater into the Edmond/OKC/Norman areas. So, if ideal training/repeating can align, these will be the areas of greatest localized flash flooding potential this morning. Gallina ...Please see www.wpc.ncep.noaa.gov for graphic product... ATTN...WFO...ICT...OUN...TSA... ATTN...RFC...TUA...NWC... LAT...LON 38439827 38119752 36419658 35169636 34199677 33989742 34339778 35449759 36679785 37479818 38149842  106 AWUS01 KWNH 221348 FFGMPD MIZ000-221930- Mesoscale Precipitation Discussion 1110 NWS Weather Prediction Center College Park MD 947 AM EDT Sat Aug 22 2026 Areas affected...Lower Peninsula of Michigan... Concerning...Heavy rainfall...Flash flooding possible Valid 221350Z - 221930Z SUMMARY...Multiple rounds of thunderstorms capable of 1.5"/hr with localized slow motions further north and back-building/repeating further south may allow for localized flash flooding concerns through early afternoon. DISCUSSION...GOES-E WV shows a broad longwave trof centered over the LP of MI this morning with a stronger upstream shortwave digging out of WI providing height-falls and strengthening/sharpening of the surface low near the Mackinaw Strait with an attendant cold front angling southwest just crossing the far southeast side of Lake Michigan into SW MI at this time. A upstream exiting MCV between Lake Erie and Ontario allows for broadening downstream portion of the longwave trough with solid diffluence aloft to promote ascent along and well ahead of the cold front. Instability has been a limiting factor through eastern MI but RAP analysis modified by recent surface temperatures suggests weakly capped 1000-1500 J/kg of MLCAPE reducing to 250 J/kg in far E MI, with initial, early morning convection exhausting much of it. However, that convection helped develop a WSW to ENE boundary and with favorable southerly component to low level winds and available unstable air has been able to develop stronger flanking development with somewhat favorable orientation to the deep layer mean flow to increase residency. Surface Tds in the low 60s and modest mid-level moisture with the effective warm conveyor pressed eastward is limiting overall available moisture to around 1.25"; so localized convergence/flux will be the driving force for rates of 1.5" with occasionally higher localized peaks. This is falling generally over the core of the sandier soils of central LP where FFGs are high, but proximity to urban locations along the I-96 corridor may still pose urban flash flooding, but at least prep the area for later developing convection from the cold front toward early afternoon. Further north, as the shortwave sharpens the mean steering flow will reduce in the trough especially along/east of the strengthening surface wave. So cells will increase in residency toward NE LP. This is also where FFGs are naturally a bit lower with spots of 1-1.5"/hr and 1.5-2.5"/3hrs. As such, with multiple rounds and possible mergers due to the sharpening/pivot in the line, localized totals of 2-3" are possible and may result in localized flash flooding concerns toward afternoon. Gallina ...Please see www.wpc.ncep.noaa.gov for graphic product... ATTN...WFO...APX...DTX...GRR... ATTN...RFC...MSR...NWC... LAT...LON 45408442 45358357 44998319 44348316 44148285 43718246 42678240 42378281 42188307 42148364 42158500 42578530 43298490 43808493 44228553 45058512  144 FOUS71 KRHA 221350 FFHNJ1 HEADWATER STATEMENT FOR NEW JERSEY STREAMS MIDDLE ATLANTIC RIVER FORECAST CENTER NATIONAL WEATHER SERVICE STATE COLLEGE PA 930 AM EDT SAT AUG 22 2026 APPROXIMATE 1/3/6/12-HR BASIN AVERAGED RAINFALL (INCHES) REQUIRED TO CAUSE MINOR, MODERATE, AND MAJOR FLOODING AT THE INDICATED HEADWATER LOCATIONS. .B RHA 260822 Z DH12/DC2608221330/DUE/PPHCF/PPTCF/PPQCF/PPKCF : :IDENT 1HR 3HR 6HR 12HR HEADWATER NAME STREAM :======= ==== ==== ==== ==== ==================== ================== : : NWS BROOKHAVEN SERVICE AREA... : Ramapo River... MAWN4 2.1/ 2.3/ 2.8/ 3.1 :Mahwah (8ft) Ramapo River :MAWN4md 2.3/ 2.6/ 3.2/ 3.7 Mahwah (9) Ramapo River :MAWN4mj 3.3/ 3.8/ 4.9/ 5.5 Mahwah (12) Ramapo River : Hohokus Brook... HOHN4 1.0/ 1.2/ 1.5/ 2.4 :Ho-Ho-Kus (3ft) Hohokus Brook : Saddle River... LODN4 1.1/ 1.1/ 1.3/ 1.9 :Lodi (5.5ft) Saddle River :LODN4md 1.6/ 1.6/ 1.8/ 2.7 Lodi (7) Saddle River :LODN4mj 1.9/ 1.9/ 2.2/ 3.2 Lodi (8) Saddle River : Rahway River... SPGN4 1.5/ 1.5/ 1.6/ 2.1 :Springfield (5.5ft) Rahway River : : NWS MT. HOLLY SERVICE AREA... : PASSAIC BASIN... : Passaic River... CAMN4 2.5/ 2.6/ 3.4/ 3.7 :Chatham (6ft) Passaic River :CAMN4md 4.7/ 4.8/ 5.6/ 6.2 Chatham (7.2) Passaic River :CAMN4mj 5.4/ 5.6/ 6.5/ 7.3 Chatham (8.2) Passaic River : Rockaway River... BOTN4 3.6/ 4.0/ 4.5/ 5.5 :Boonton Abv. (5ft) Rockaway River :BOTN4md 4.0/ 4.6/ 5.3/ 6.5 Boonton Abv. (6) Rockaway River :BOTN4mj 4.4/ 5.0/ 5.7/ 7.1 Boonton Abv. (7) Rockaway River : Whippany River... WHIN4 2.1/ 2.2/ 2.5/ 2.7 :Morristown (6ft) Whippany River : RARITAN BASIN.. : South Branch Raritan River... STTN4 2.2/ 2.4/ 3.0/ 3.2 :Stanton (8ft) S. Br. Raritan River :STTN4md 2.4/ 2.6/ 3.5/ 4.0 Stanton (10) S. Br. Raritan River :STTN4mj 2.6/ 2.9/ 4.1/ 4.8 Stanton (12) S. Br. Raritan River : North Branch Raritan River... RRTN4 1.8/ 2.1/ 2.5/ 2.9 :Raritan (10ft) N. Br. Raritan River :RRTN4md 2.0/ 2.3/ 2.9/ 3.6 Raritan (12) N. Br. Raritan River :RRTN4mj 2.4/ 2.8/ 3.7/ 4.5 Raritan (15) N. Br. Raritan River : Millstone River... BKWN4 3.0/ 3.2/ 3.5/ 3.5 :Blackwells Mills(9ft) Millstone River :BKWN4md 3.0/ 3.3/ 3.6/ 3.6 Blackwells Mills(10) Millstone River :BKWN4mj 3.4/ 3.7/ 4.2/ 4.9 Blackwells Mills(15) Millstone River : DELAWARE BASIN... : Assunpink Creek...TACN4 2.2/ 2.2/ 2.6/ 3.2 :Trenton (8.5ft) Assunpink Creek :TACN4md 2.3/ 2.4/ 3.2/ 3.7 Trenton (9.5) Assunpink Creek :TACN4mj 2.4/ 2.7/ 3.6/ 4.3 Trenton (11) Assunpink Creek .END $$ NNNN $$ NNNN  145 FOUS71 KRHA 221350 FFHPA2 HEADWATER STATEMENT FOR THE DELAWARE AND SUSQUEHANNA BASINS MIDDLE ATLANTIC RIVER FORECAST CENTER NATIONAL WEATHER SERVICE STATE COLLEGE PA 930 AM EDT SAT AUG 22 2026 APPROXIMATE 1/3/6/12-HR BASIN AVERAGED RAINFALL (INCHES) REQUIRED TO CAUSE MINOR, MODERATE, AND MAJOR FLOODING AT THE INDICATED HEADWATER LOCATIONS. .B RHA 260822 Z DH12/DC2608221330/DUE/PPHCF/PPTCF/PPQCF/PPKCF : :IDENT 1HR 3HR 6HR 12HR HEADWATER NAME :======= ==== ==== ==== ==== ==================== : : NWS BINGHAMTON SERVICE AREA... : SUSQUEHANNA BASIN... : Tioughnioga River... CRTN6 2.6/ 2.9/ 3.2/ 3.5 :Cortland (8ft) :CRTN6md 2.7/ 3.1/ 4.0/ 4.3 Cortland (10) :CRTN6mj 2.9/ 3.4/ 4.5/ 5.1 Cortland (12.5) : Chenango River... SHBN6 2.6/ 2.9/ 3.0/ 3.6 :Sherburne (8.5ft) :SHBN6md 2.7/ 3.0/ 3.4/ 4.4 Sherburne (9) :SHBN6mj 2.8/ 3.1/ 3.9/ 4.7 Sherburne (10.6) : Otselic River... CINN6 3.0/ 3.3/ 3.8/ 4.7 :Cincinnatus (9ft) : ...moderate and major flood stages above rating table. : Cohocton River... CMPN6 2.9/ 3.2/ 3.7/ 4.5 :Campbell (8ft) :CMPN6md 3.1/ 3.5/ 4.5/ 5.1 Campbell (10) :CMPN6mj 3.3/ 3.8/ 5.1/ 5.8 Campbell (11) : Canisteo River... WCRN6 2.2/ 2.5/ 3.1/ 3.9 :West Cameron (17ft) :WCRN6md 2.2/ 2.6/ 3.2/ 4.1 West Cameron (18) :WCRN6mj 2.5/ 2.9/ 3.8/ 4.8 West Cameron (21) : Towanda Creek... MONP1 1.8/ 2.0/ 2.4/ 3.0 :Monroeton (15.5ft) :MONP1md 1.9/ 2.1/ 2.7/ 3.3 Monroeton (17) :MONP1mj 2.2/ 2.4/ 3.1/ 3.9 Monroeton (18.5) : Tunkhannock Creek... TNKP1 2.3/ 2.8/ 4.1/ 4.7 :Tunkhannock (11ft) :TNKP1md 2.5/ 3.1/ 4.5/ 5.4 Tunkhannock (14) :TNKP1mj 2.7/ 3.4/ 5.0/ 5.9 Tunkhannock (17) : Lackawanna River... OFRP1 2.3/ 2.8/ 3.4/ 4.6 :Old Forge (11ft) :OFRP1md 2.4/ 2.9/ 3.6/ 4.8 Old Forge (13) :OFRP1mj 2.6/ 3.1/ 4.0/ 5.3 Old Forge (16) : DELAWARE BASIN... : East Branch Delaware River... MRGN6 3.6/ 4.0/ 4.6/ 5.1 :Margaretville (11ft) :MRGN6md 4.3/ 4.8/ 5.5/ 6.3 Margaretville (12) :MRGN6mj 5.0/ 5.6/ 6.6/ 7.7 Margaretville (13) : West Branch Delaware River... WALN6 2.6/ 2.7/ 3.0/ 3.5 :Walton (11.5ft) :WALN6md 2.9/ 3.1/ 3.5/ 4.0 Walton (14) :WALN6mj 3.4/ 3.7/ 4.2/ 4.8 Walton (16) : Beaverkill Creek... CKFN6 1.9/ 2.0/ 2.3/ 2.8 :Cooks Falls (10ft) :CKFN6md 2.7/ 2.9/ 3.6/ 4.7 Cooks Falls (16) :CKFN6mj 3.1/ 3.4/ 4.4/ 5.7 Cooks Falls (18) : Lackawaxen River... HWYP1 2.4/ 2.8/ 3.3/ 4.1 :Hawley (14ft) :HWYP1md 3.1/ 3.5/ 4.3/ 5.4 Hawley (20) :HWYP1mj 3.4/ 3.8/ 4.7/ 5.9 Hawley (22) : : NWS STATE COLLEGE SERVICE AREA... : SUSQUEHANNA BASIN... : Tioga River... MFDP1 1.9/ 2.4/ 3.5/ 4.2 :Mansfield (12ft) :MFDP1md 2.0/ 2.7/ 3.8/ 4.6 Mansfield (13) :MFDP1mj 2.2/ 3.0/ 4.4/ 5.1 Mansfield (14) : Penns Creek... PNCP1 2.8/ 3.1/ 3.2/ 3.6 :Penns Creek (8ft) :PNCP1md 2.9/ 3.3/ 3.7/ 4.6 Penns Creek (10) :PNCP1mj 3.1/ 3.6/ 4.4/ 5.5 Penns Creek (12) : Frankstown Branch Juniata River... WIBP1 1.8/ 1.9/ 2.2/ 2.2 :Williamsburg (12ft) :WIBP1md 1.8/ 2.0/ 2.3/ 2.5 Williamsburg (13) :WIBP1mj 1.9/ 2.1/ 2.5/ 3.0 Williamsburg (15) : Little Juniata River... SPKP1 1.6/ 1.6/ 1.8/ 1.9 :Spruce Creek (8ft) :SPKP1md 1.7/ 1.8/ 2.0/ 2.2 Spruce Creek (10) :SPKP1mj 2.1/ 2.2/ 2.7/ 3.0 Spruce Creek (14) : Aughwick Creek... SLYP1 1.6/ 1.7/ 1.8/ 2.2 :Shirleysburg (10ft) :SLYP1md 1.8/ 1.9/ 2.1/ 2.6 Shirleysburg (12) :SLYP1mj 3.9/ 4.3/ 5.1/ 6.9 Shirleysburg (20) : Sherman Creek... SMDP1 2.2/ 2.6/ 3.1/ 3.6 :Shermans Dale (9ft) :SMDP1md 2.6/ 3.0/ 3.5/ 4.2 Shermans Dale (11) :SMDP1mj 3.9/ 4.6/ 5.5/ 6.3 Shermans Dale (16) : Conodoguinet Creek... HGSP1 3.3/ 3.3/ 3.5/ 3.5 :Hogestown (8ft) :HGSP1md 3.5/ 3.7/ 4.4/ 5.0 Hogestown (10) :HGSP1mj 3.8/ 4.2/ 5.2/ 5.8 Hogestown (12) : Yellow Breeches Creek... CPHP1 1.8/ 2.2/ 2.5/ 3.9 :Camp Hill (7ft) :CPHP1md 2.0/ 2.3/ 2.8/ 4.2 Camp Hill (9) :CPHP1mj 2.5/ 2.9/ 3.8/ 5.4 Camp Hill (13) : Swatara Creek... HTVP1 2.0/ 2.4/ 2.9/ 4.2 :Harper Tavern (9ft) :HTVP1md 2.3/ 2.8/ 3.7/ 5.1 Harper Tavern (12) :HTVP1mj 2.7/ 3.3/ 4.2/ 5.9 Harper Tavern (15) : Conestoga River... LNCP1 1.7/ 2.0/ 2.2/ 3.1 :Lancaster (11ft) :LNCP1md 1.9/ 2.2/ 2.5/ 3.4 Lancaster (13) :LNCP1mj 2.0/ 2.5/ 2.8/ 3.8 Lancaster (15) : DELAWARE BASIN... : Schuylkill River... LGVP1 2.6/ 2.8/ 2.9/ 3.0 :Landingville (8ft) :LGVP1md 3.4/ 3.7/ 3.9/ 4.2 Landingville (12) :LGVP1mj 4.2/ 4.6/ 4.8/ 5.4 Landingville (14) : : NWS MT. HOLLY SERVICE AREA... : DELAWARE BASIN... : Schuylkill River... BREP1 2.9/ 3.8/ 4.7/ 6.0 :Berne (12ft) :BREP1md 3.3/ 4.2/ 5.4/ 7.0 Berne (14) :BREP1mj 3.6/ 4.7/ 5.9/ 7.6 Berne (16) : Bush Kill... SHOP1 2.6/ 3.2/ 3.5/ 3.5 :Shoemakers (6ft) :SHOP1md 2.8/ 3.4/ 4.0/ 4.6 Shoemakers (7) :SHOP1mj 3.0/ 3.7/ 4.6/ 5.1 Shoemakers (8) : Brodhead Creek... MNSP1 1.8/ 2.2/ 2.8/ 3.7 :Minisink Hills(10ft) :MNSP1md 2.0/ 2.4/ 3.2/ 4.2 Minisink Hills(12) :MNSP1mj 2.2/ 2.7/ 3.7/ 4.9 Minisink Hills(15) : Little Lehigh Creek...APAP1 4.4/ 4.7/ 5.2/ 6.1 :Allentown-10th (8ft) :APAP1md 5.3/ 5.7/ 6.3/ 7.6 Allentown-10th (10) :APAP1mj 6.3/ 6.8/ 7.4/ 8.0 Allentown-10th (12) : Perkiomen Creek... GRAP1 1.8/ 2.2/ 2.8/ 3.5 :Graterford (11ft) :GRAP1md 1.9/ 2.4/ 3.2/ 3.8 Graterford (13) :GRAP1mj 2.3/ 2.8/ 3.8/ 4.5 Graterford (16) : Neshaminy Creek... LNGP1 2.5/ 2.5/ 2.5/ 2.5 :Langhorne (9ft) :LNGP1md 2.7/ 2.8/ 3.0/ 3.0 Langhorne (10) :LNGP1mj 2.9/ 3.1/ 3.5/ 3.8 Langhorne (12) : Chester Creek... CHSP1 1.8/ 1.8/ 2.1/ 2.7 :Chester (8ft) :CHSP1md 2.3/ 2.3/ 2.7/ 3.4 Chester (10) :CHSP1mj 3.2/ 3.3/ 3.7/ 4.7 Chester (14) : West Branch Brandywine Creek... MODP1 3.9/ 4.0/ 4.4/ 4.6 :Modena (9ft) :MODP1md 4.4/ 4.6/ 5.1/ 5.3 Modena (10) :MODP1mj 6.5/ 7.0/ 7.4/ 8.0 Modena (12) : East Branch Brandywine Creek... DWNP1 1.1/ 1.1/ 1.2/ 1.3 :Downingtown (7ft) :DWNP1md 1.8/ 1.8/ 1.9/ 2.1 Downingtown (9) :DWNP1mj 2.6/ 2.7/ 2.8/ 3.1 Downingtown (11) : Brandywine Creek... CDFP1 2.1/ 2.1/ 2.2/ 2.4 :Chadds Ford (9ft) :CDFP1md 2.3/ 2.3/ 2.7/ 3.4 Chadds Ford (11) :CDFP1mj 2.5/ 2.6/ 3.3/ 4.2 Chadds Ford (13) : Christina River... CHBD1 1.5/ 1.7/ 1.9/ 2.8 :Coochs Brdg(11ft) :CHBD1md 1.9/ 2.1/ 2.4/ 3.4 Coochs Brdg(12) :CHBD1mj 2.5/ 2.8/ 3.2/ 4.5 Coochs Brdg(13) : White Clay Creek... DPKD1 1.7/ 1.8/ 2.0/ 2.6 :Delaware Pk (13ft) :DPKD1md 2.4/ 2.5/ 2.7/ 3.4 Delaware Pk (15) :DPKD1mj 3.4/ 3.6/ 3.9/ 5.0 Delaware Pk (16.5) : Red Clay Creek... RCCD1 2.0/ 2.2/ 2.4/ 2.9 :Wooddale (7ft) :RCCD1md 2.6/ 2.9/ 3.3/ 3.9 Wooddale (8.5) :RCCD1mj 3.3/ 3.6/ 4.0/ 4.9 Wooddale (10) .END :=============================================================== : EXPERIMENTAL NON-FCST POINT RAW MODEL OUTPUT : NO MANUAL QC OR ADJUSTMENTS APPLIED...USE WITH CAUTION :=============================================================== : : NWS BINGHAMTON SERVICE AREA... .B RHA 260822 Z DH12/DC2608221330/DUE/PPHCF/PPTCF/PPQCF/PPKCF :GageID 1hr 3hr 6hr 12hr rainfall for indicated stages : Lackawanna River... ARHP1 3.9/ 4.0/ 4.5/ 5.3 :Archbald (8ft) :ARHP1md 4.5/ 4.7/ 5.1/ 6.2 Archbald (9) :ARHP1mj 5.2/ 5.3/ 5.9/ 7.2 Archbald (10) PKIP1 4.4/ 4.5/ 4.7/ 5.1 :Scranton (12.5ft.) :PKIP1md 4.7/ 4.8/ 4.9/ 5.5 Scranton (14) :PKIP1mj 4.8/ 4.9/ 5.1/ 5.7 Scranton (15) .END : Model-simulated 3-hourly stage forecasts including QPF... .E ARHP1 20260822 DC2608221350/DH15/HGIFX/DIH3/ .E1 1.8/1.8/1.8/1.8/1.8/1.8/1.9/2.0 .E PKIP1 20260822 DC2608221350/DH15/HGIFX/DIH3/ .E1 1.1/1.1/1.1/1.1/1.1/1.1/1.3/1.5 $$ NNNN  146 FOUS71 KRHA 221350 FFHVA2 HEADWATER STATEMENT FOR THE POTOMAC AND JAMES BASINS MIDDLE ATLANTIC RIVER FORECAST CENTER NATIONAL WEATHER SERVICE STATE COLLEGE PA 930 AM EDT SAT AUG 22 2026 APPROXIMATE 1/3/6/12-HR BASIN AVERAGED RAINFALL (INCHES) REQUIRED TO CAUSE MINOR, MODERATE, AND MAJOR FLOODING AT THE INDICATED HEADWATER LOCATIONS. .B RHA 260822 Z DH12/DC2608221330/DUE/PPHCF/PPTCF/PPQCF/PPKCF : :IDENT 1HR 3HR 6HR 12HR HEADWATER NAME :======= ==== ==== ==== ==== ==================== : : NWS STERLING SERVICE AREA... : POTOMAC BASIN... : North Branch Potomac River... KITM2 2.2/ 2.4/ 2.8/ 3.6 :Kitzmiller (9ft) :KITM2md 3.0/ 3.3/ 4.1/ 5.6 Kitzmiller (11) :KITM2mj 4.4/ 4.9/ 6.3/ 8.0 Kitzmiller (13) : Georges Creek... WSTM2 1.3/ 1.4/ 1.7/ 2.0 :Westernport (8ft) :WSTM2md 1.9/ 2.2/ 2.5/ 3.0 Westernport (10) :WSTM2mj 2.6/ 2.9/ 3.4/ 3.9 Westernport (12) : South Branch Potomac River... FKLW2 2.1/ 2.4/ 2.6/ 3.3 :Franklin (7ft) :FKLW2md 2.3/ 2.6/ 2.9/ 3.9 Franklin (9) :FKLW2mj 2.5/ 2.9/ 3.3/ 4.5 Franklin (11) : Opequon Creek... MBGW2 2.6/ 3.3/ 3.8/ 4.9 :Martinsburg (10ft) :MBGW2md 2.8/ 3.5/ 4.1/ 5.7 Martinsburg (12.5) :MBGW2mj 3.2/ 4.0/ 4.9/ 6.6 Martinsburg (15) : South River... WAYV2 3.5/ 4.3/ 5.6/ 7.1 :Waynesboro (9.5ft) :WAYV2md 3.7/ 4.5/ 6.1/ 7.8 Waynesboro (11) :WAYV2mj 4.0/ 5.0/ 6.9/ 8.0 Waynesboro (13) : North Fork Shenandoah River... COOV2 2.5/ 2.8/ 3.7/ 4.5 :Cootes Store (15ft) :COOV2md 2.9/ 3.3/ 4.5/ 5.4 Cootes Store (18) :COOV2mj 3.4/ 3.8/ 5.4/ 6.6 Cootes Store (21) : Antietam Creek... SACM2 2.2/ 3.0/ 3.9/ 5.6 :Sharpsburg (8ft) :SACM2md 2.3/ 3.1/ 4.5/ 6.2 Sharpsburg (10) :SACM2mj 2.5/ 3.4/ 5.3/ 7.0 Sharpsburg (12) : Seneca Creek... DAWM2 2.5/ 2.7/ 3.1/ 3.7 :Dawsonville (7.5ft) :DAWM2md 3.1/ 3.5/ 4.8/ 6.1 Dawsonville (11) :DAWM2mj 5.1/ 5.9/ 7.4/ 8.0 Dawsonville (16) : : NWS BLACKSBURG SERVICE AREA... : Maury River... BVSV2 4.6/ 6.5/ 7.4/ 8.0 :Buena Vista (17ft) :BVSV2cs 4.2/ 5.5/ 7.0/ 8.0 Buena Vista (13) :BVSV2md 4.8/ 6.7/ 7.4/ 8.0 Buena Vista (19) :BVSV2mj 5.0/ 7.0/ 7.4/ 8.0 Buena Vista (21) .END : :=============================================================== : EXPERIMENTAL NON-FCST POINT RAW MODEL OUTPUT : NO MANUAL QC OR ADJUSTMENTS APPLIED...USE WITH CAUTION :=============================================================== : : NWS STERLING SERVICE AREA... : Rock Creek at Sherrill Drive.,Washington DC .B RHA 260822 Z DH12/DC2608221330/DUE/PPHCF/PPTCF/PPQCF/PPKCF :GageID 1hr 3hr 6hr 12hr rainfall for indicated stages RCKD2 1.8/ 1.9/ 2.1/ 2.5 :Washington, DC (7ft) :RCKD2md 2.4/ 2.7/ 3.0/ 3.6 Washington, DC (10) :RCKD2mj 3.2/ 3.5/ 3.9/ 4.7 Washington, DC (12) .END : Model-simulated 3-hourly stage forecasts including QPF... .E RCKD2 20260822 DC2608221350/DH15/HGIFX/DIH3/ .E1 2.0/2.2/2.3/2.2/2.2/2.2/2.2/2.1 $$ NNNN  510 FOUS73 KMSR 221400 FFHMKX HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 900 AM CDT SAT AUG 22 2026 MILWAUKEE HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH12/DC2608221400 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** WISCONSIN HEADWATER POINTS *** : AFTW3 2.0/ 2.5/ 3.0 :AFTON WI ROCK R BCHW3 1.9/ 2.0/ 2.4 :BLANCHARDVILLE WI E BR PECATONICA R BUNW3 2.3/ 2.6/ 3.1 :BUNCOMBE WI GALENA R DARW3 2.3/ 2.5/ 3.2 :DARLINGTON WI PECATONICA R MTNW3 1.7/ 1.9/ 2.8 :MARTINTOWN WI PECATONICA R MAZW3 2.1/ 2.3/ 2.9 :MAZOMANIE WI BLACK EARTH CR KINW3 2.8/ 3.5/ 4.2 :MILWAUKEE WI KINNICKINNIC R SEBW3 2.6/ 2.8/ 3.5 :SHEBOYGAN WI SHEBOYGAN R WKEW3 3.1/ 3.1/ 3.2 :WAUKESHA WI FOX R WWTW3 3.3/ 3.5/ 3.8 :WAUWATOSA WI MENOMONEE R BLOW3 1.5/ 1.6/ 1.8 :BELOIT WI TURTLE CR MFSW3 0.5/ 1.0/ 1.0 :MENOMONEE FALLS WI MENOMONEE R OAKW3 2.0/ 2.1/ 2.5 :SOUTH MILWAUKEE OAK CR .END $$  511 FOUS73 KMSR 221400 FFHMPX HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 900 AM CDT SAT AUG 22 2026 TWIN CITIES HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH12/DC2608221400 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** MINNESOTA HEADWATER POINTS *** : SNCM5 2.5/ 2.7/ 2.9 :JORDAN MN SAND CR PNLM5 3.2/ 3.8/ 4.5 :PINE ISLAND MN MID FK ZUMBRO R PILM5 3.5/ 4.0/ 4.5 :PINE ISLAND MN N B MID FK ZUMBRO R WGOM5 3.5/ 4.0/ 4.5 :WANAMINGO MN NO FK ZUMBRO R .END $$  512 FOUS73 KMSR 221400 FFHILX HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 900 AM CDT SAT AUG 22 2026 LINCOLN HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH12/DC2608221400 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** ILLINOIS HEADWATER POINTS *** : BMII2 3.5/ 4.0/ 4.5 :BLOOMINGTON IL SUGAR CR RLLI2 0.5/ 1.0/ 1.0 :ROWELL IL SALT CR .END $$  513 FOUS73 KMSR 221400 FFHLOT HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 900 AM CDT SAT AUG 22 2026 CHICAGO HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH12/DC2608221400 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** ILLINOIS HEADWATER POINTS *** : NBPI2 2.5/ 2.6/ 2.9 :CHICAGO IL N BR CHICAGO R CDCI2 1.0/ 1.2/ 1.5 :CHICAGO HEIGHTS IL DEER CR DRFI2 2.4/ 2.7/ 3.8 :DEERFIELD IL N BR CHICAGO R DEKI2 3.5/ 4.0/ 4.5 :DE KALB IL S BR KISHWAUKEE R DSPI2 3.0/ 3.0/ 3.1 :DES PLAINES IL DES PLAINES R WLRI2 2.9/ 3.3/ 3.7 :DES PLAINES IL WELLER CR EMHI2 2.6/ 3.0/ 3.4 :ELMHURST IL SALT CR FLSI2 1.1/ 1.4/ 1.7 :FLOSSMOOR IL BUTTERFIELD CR GLWI2 1.4/ 1.8/ 2.1 :GLENWOOD IL THORN CR GUNI2 2.5/ 2.6/ 2.6 :GURNEE IL DES PLAINES R JHCI2 2.3/ 2.5/ 2.8 :JOLIET IL HICKORY CR LAFI2 2.4/ 2.7/ 3.8 :LAKE FOREST IL SKOKIE R NILI2 3.4/ 4.0/ 4.5 :NILES IL N BR CHICAGO R NBRI2 3.5/ 4.0/ 4.5 :NORTHBROOK IL W FK N BR CHICAGO R OAKI2 2.9/ 3.0/ 3.5 :OAK FOREST IL MIDLOTHIAN CR MCDI2 3.2/ 3.6/ 3.9 :PROSPECT HTS IL MCDONALD CR ALPI2 1.3/ 1.4/ 1.6 :ROCKFORD IL ALPINE DAM-KEITH CR LEVI2 1.6/ 2.0/ 2.5 :ROCKFORD IL LEVINGS LAKE PPLI2 1.8/ 2.2/ 2.7 :ROCKFORD IL PAGE PARK LAKE ROLI2 2.8/ 3.2/ 3.7 :ROLLING MEADOWS IL SALT CR SCHI2 3.4/ 3.9/ 4.4 :ST CHARLES IL FERSON CR SORI2 3.5/ 3.6/ 3.7 :SHOREWOOD IL DU PAGE R THNI2 1.2/ 1.2/ 1.2 :THORNTON IL THORN CR WHEI2 2.9/ 3.1/ 3.3 :WHEELING IL BUFFALO CR WLSI2 3.5/ 4.0/ 4.5 :WILLOW SPRINGS IL FLAG CR YRKI2 2.5/ 2.5/ 2.5 :YORKVILLE IL BLACKBERRY CR : : *** INDIANA HEADWATER POINTS *** : HDDI3 3.5/ 4.0/ 4.5 :DYER IN HART DITCH MNTI3 3.4/ 3.4/ 3.4 :MUNSTER IN HART DITCH LCMI3 2.7/ 2.6/ 2.7 :MUNSTER IN LITTLE CALUMET R PRTI3 1.9/ 1.9/ 1.9 :PORTER IN LITTLE CALUMET R .END $$  514 FOUS73 KMSR 221400 FFHLSX HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 900 AM CDT SAT AUG 22 2026 ST LOUIS HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH12/DC2608221400 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** MISSOURI HEADWATER POINTS *** : EWNM7 3.0/ 3.3/ 3.8 :EWING MO 5E NORTH FABIUS R EWMM7 3.0/ 3.3/ 3.7 :EWING MO 1NNE MIDDLE FABIUS R PALM7 1.8/ 1.9/ 2.3 :PALMYRA MO NORTH R TAYM7 1.8/ 2.3/ 2.9 :TAYLOR MO S FABIUS R PMZM7 2.3/ 2.6/ 3.0 :HOLLIDAY MO 2N MI FK SALT R TRYM7 1.6/ 1.7/ 1.9 :TROY MO CUIVRE R DRCM7 1.9/ 2.0/ 2.2 :ST PETERS MO DARDENNE CR LSLM7 2.0/ 2.3/ 2.6 :LAKE SAINT LOUIS PERUQUE CR - ABOVE LSTM7 1.6/ 1.8/ 2.0 :LAKE ST LOUIS MO PERUQUE CR CSNM7 1.5/ 1.6/ 1.6 :COOK STATION MO 1N MERAMEC R SEEM7 1.4/ 1.6/ 1.9 :STEELVILLE MO 2N MERAMEC R UNNM7 3.1/ 3.3/ 3.5 :UNION MO BOURBEUSE R BYRM7 2.7/ 3.1/ 3.6 :BYRNESVILLE MO 2NNE BIG R .END $$  515 FOUS73 KMSR 221400 FFHFGF HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 900 AM CDT SAT AUG 22 2026 GRAND FORKS HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH12/DC2608221400 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** MINNESOTA HEADWATER POINTS *** : CSRM5 3.5/ 4.0/ 4.1 :CAMPBELL MN 1W SO FK RABBIT R MALM5 3.5/ 3.8/ 4.5 :MALUNG MN 2NW ROSEAU R BLO SO FK : : *** NORTH DAKOTA HEADWATER POINTS *** : DWGN8 3.5/ 4.0/ 4.5 :DWIGHT ND 1NE ANTELOPE CR HGRN8 3.5/ 4.0/ 4.5 :HILLSBORO ND GOOSE R LTRN8 2.6/ 2.7/ 3.0 :LARIMORE ND 5ENE TURTLE R .END $$  519 FOUS73 KMSR 221400 FFHDMX HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 900 AM CDT SAT AUG 22 2026 DES MOINES HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH12/DC2608221400 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** IOWA HEADWATER POINTS *** : AKWI4 2.8/ 2.9/ 3.1 :ACKWORTH IA SOUTH R AMWI4 2.9/ 2.9/ 3.0 :AMES IA IOWAY CR BSSI4 2.8/ 2.9/ 3.2 :BUSSEY IA CEDAR CR DFMI4 3.4/ 3.5/ 3.6 :DSM-EASTON FOUR MILE CR CLVI4 2.6/ 2.9/ 3.1 :CLIVE I-80/35 WALNUT CR DOSI4 2.8/ 2.9/ 3.3 :DSM-63RD ST WALNUT CR MCWI4 3.5/ 3.7/ 4.2 :MASON CITY IA WINNEBAGO R .END $$  523 FOUS73 KMSR 221400 FFHAPX HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 900 AM CDT SAT AUG 22 2026 GAYLORD HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH12/DC2608221400 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** MICHIGAN HEADWATER POINTS *** : BVTM4 3.5/ 4.0/ 4.5 :BEAVERTON MI TOBACCO R MYFM4 3.5/ 4.0/ 4.3 :MAYFIELD MI BOARDMAN R RUDM4 3.5/ 4.0/ 4.5 :RUDYARD MI PINE RIVER .END $$  524 FOUS73 KMSR 221400 FFHARX HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 900 AM CDT SAT AUG 22 2026 LA CROSSE HYDRLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH12/DC2608221400 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** IOWA HEADWATER POINTS *** : DEHI4 3.5/ 4.0/ 4.5 :DECORAH IA UPPER IOWA R DCHI4 2.8/ 3.1/ 3.6 :DORCHESTER IA UPPER IOWA R GRBI4 2.3/ 2.4/ 2.7 :GARBER IA TURKEY R : : *** MINNESOTA HEADWATER POINTS *** : ASTM5 2.4/ 2.6/ 3.0 :AUSTIN WWTP MN CEDAR R DOBM5 2.8/ 2.9/ 3.2 :AUSTIN MN-21ST DOBBINS CR TRCM5 3.2/ 3.5/ 4.3 :AUSTIN MN-41 AV NW TURTLE CR HOUM5 2.1/ 2.3/ 2.8 :HOUSTON MN ROOT R LNSM5 3.1/ 3.5/ 3.9 :LANESBORO MN S BR ROOT R LANM5 2.8/ 3.0/ 3.3 :LANSING MN CEDAR R PTNM5 3.0/ 3.3/ 4.1 :PRESTON MN S BR ROOT R RBCM5 3.5/ 3.9/ 4.4 :ROCHESTER MN BEAR CR RCCM5 3.3/ 3.5/ 4.2 :ROCHESTER MN CASCADE CR ROCM5 3.5/ 4.0/ 4.5 :ROCHESTER MN SILVER CR RCSM5 3.5/ 4.0/ 4.5 :HWY 14 ROCHESTER S FK ZUMBRO R RCHM5 3.4/ 3.9/ 4.5 :ROCHESTER MN S FK ZUMBRO R WSPM5 2.8/ 3.0/ 3.7 :WHITEWATER ST.PK MFK WHITEWATER R ZUMM5 3.3/ 4.0/ 4.5 :ZUMBRO FALLS MN ZUMBRO R : : *** WISCONSIN HEADWATER POINTS *** : BTNW3 2.1/ 2.2/ 2.2 :BURTON WI GRANT R DDGW3 3.5/ 3.5/ 3.7 :DODGE WI TREMPEALEAU R GMIW3 3.2/ 3.4/ 3.7 :GAYS MILLS WI KICKAPOO R HILW3 2.0/ 2.1/ 2.3 :HILLSBORO WWTP WI S BR BARABOO R LAFW3 2.5/ 2.6/ 2.8 :LA FARGE WI KICKAPOO R NEIW3 2.7/ 3.5/ 4.3 :NEILLSVILLE WI BLACK R ONTW3 2.5/ 2.6/ 2.7 :ONTARIO WI KICKAPOO R REAW3 2.8/ 2.9/ 3.1 :READSTOWN WI KICKAPOO R RVLW3 2.8/ 2.9/ 3.1 :ROCKVILLE WI 2E PLATTE R SOGW3 2.6/ 2.7/ 2.8 :SOLDIERS GROVE WI KICKAPOO R STEW3 2.9/ 3.0/ 3.1 :STEUBEN WI KICKAPOO R VIOW3 2.6/ 2.7/ 2.7 :VIOLA WI KICKAPOO R .END $$  833 FOUS62 KALR 221406 FFGSJU COUNTY FLASH FLOOD GUIDANCE...PUERTO RICO NATIONAL WEATHER SERVICE SOUTHEAST RIVER FORECAST CENTER...ATLANTA GA 1005 AM EDT SAT AUG 22 2026 INCHES OF RAINFALL FOR SPECIFIED DURATIONS REQUIRED TO PRODUCE FLASH FLOODING IN FORECAST ZONES. LOWER AMOUNTS MAY CAUSE FLASH FLOODING IN URBAN OR MOUNTAINOUS AREAS. .B ALR 20260822 Z DH12/DC202608221405 /DUE/PPHCF/PPTCF/PPQCF :IDENTIFIERS ARE 2-LETTER STATE, Z FOR ZONE, 3-DIGIT ZONE NUMBER : :IDENT 1HR 3HR 6HR ZONE NAME :======= ==== ==== ==== ==================== PRZ001 1.9/ 3.6/ 4.9 PRZ002 1.9/ 3.6/ 4.9 PRZ003 1.9/ 3.4/ 4.8 PRZ004 1.9/ 3.4/ 4.8 PRZ005 1.6/ 2.2/ 2.9 PRZ006 1.6/ 2.2/ 2.9 PRZ007 1.6/ 2.2/ 2.9 PRZ008 1.6/ 2.2/ 2.9 PRZ009 1.6/ 2.2/ 2.9 PRZ010 1.6/ 2.2/ 2.9 PRZ011 1.6/ 2.2/ 2.9 PRZ012 2.0/ 3.2/ 4.5 PRZ013 2.0/ 3.2/ 4.5 VIZ001 2.1/ 3.3/ 4.6 VIZ002 2.1/ 3.3/ 4.6 .END $$ S.E.R.F.C. 770-486-0028 or 770-282-2112 Regular Hours 6am-10pm Eastern Time After Hours Please Follow Callback Instructions  806 AWUS01 KWNH 221450 FFGMPD DEZ000-MDZ000-VAZ000-222030- Mesoscale Precipitation Discussion 1111 NWS Weather Prediction Center College Park MD 1049 AM EDT Sat Aug 22 2026 Areas affected...Middle to Lower Chesapeake Bay Region... Concerning...Heavy rainfall...Flash flooding possible Valid 221450Z - 222030Z SUMMARY...Slow moving/training warm-cloud efficient rainfall production to 2.5"/hr pose localized flash flooding with 2-4" totals in 1-3hrs. DISCUSSION...GOES-E WV and Regional RADAR shows a shortwave feature moving northeast in the warm conveyor belt southeast of the tip of the Delmarva Peninsula; while the expanding right entrance region of a 80-90kt 300mb jet remains directly overhead. This direct circulation is tightening (FGEN) a SW to NE convergence/deformation zone across South-central MD into southern DE. An axis of modest but sufficient low level unstable air existed through the lower Chesapeake Bay with a wedge of 1000 J/kg of MUCAPE residing along this axis of deep layer moisture convergence. As such, shallow thunderstorms developed across Charles to N Calvert county and extend through the Bay toward Talbot county. The shallow nature though with solid moisture flux through channeling up the Bay supports efficient tropical/warm-cloud rainfall production to support 2-2.5"/hr rates. In addition, localized frictional convergence along the edges/inlets of the Bay has resulted in more scattered/isolated but equally efficient heavy rainfall producing cells. Deep layer steering and fairly stationary right entrance region suggest slow forward propagation through the Bay toward the Eastern Shore over the next few hours. Observations so far of 1.5 to 3" in about 60-90 minutes and while the area is fairly sandy in soil type, MRMS Flash response is reaching 200-300 cfs/sqmi suggestive of localized flash flooding may be starting soon. Hi-Res CAMs all generally show a core of 2-4" additional totals through 21z, mainly focused directly over the Bay and nearby coastal areas, though some solutions hint of higher localized totals of 5"+ as well, suggesting flash flooding will remain possible into the afternoon hours across the Delmarva Peninsula, Southern Maryland and the northern Neck of VA. Gallina ...Please see www.wpc.ncep.noaa.gov for graphic product... ATTN...WFO...AKQ...LWX...PHI... ATTN...RFC...RHA...NWC... LAT...LON 38917573 38667525 38287505 37747541 37497564 37467600 37797669 38177699 38567702 38907660  813 FGUS74 KORN 221450 FFHMRX HEADWATER GUIDANCE FOR HSA.....MORRISTOWN TN NATIONAL WEATHER SERVICE LOWER MISSISSIPPI RIVER FORECAST CENTER, SLIDELL LA 948 AM CDT SAT AUG 22 2026 INCHES OF RAINFALL FOR SPECIFIED DURATIONS REQUIRED TO PRODUCE FLASH FLOODING IN HEADWATERS. .B SIL 260822 Z DH12/DC2608221448 /DUE/PPHCF/PPTCF/PPQCF/PPKCF/PPDCF : :IDENT 1HR 3HR 6HR 12HR 24HR HEADWATER NAME STREAM :======= ==== ==== ==== ==== ==== ==================== ================== : :.....TENNESSEE : DOET1 3.0/ 3.4/ 3.9/ 4.7/ 5.8 :ELIZABETHTON, TN DOE R. RMTT1 3.3/ 3.7/ 5.5/ 5.5/ 5.9 :ROAN MOUNTAIN, TN DOE R. : :.....VIRGINIA : CLVV2 2.4/ 2.6/ 2.9/ 3.4/ 4.3 :CLEVELAND, VA CLINCH R. .END $$  808 FOUS74 KORN 221450 FFHFFC HEADWATER GUIDANCE FOR HSA.....ATLANTA GA NATIONAL WEATHER SERVICE LOWER MISSISSIPPI RIVER FORECAST CENTER, SLIDELL LA 948 AM CDT SAT AUG 22 2026 INCHES OF RAINFALL FOR SPECIFIED DURATIONS REQUIRED TO PRODUCE FLASH FLOODING IN HEADWATERS. .B SIL 260822 Z DH12/DC2608221448 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : :.....GEORGIA : ENGG1 0.8/ 1.2/ 1.6 :NEW ENGLAND, GA LOOKOUT CREEK HWEG1 3.4/ 3.6/ 3.9 :HIAWASSEE, GA HIAWASSEE R. .END $$  809 FOUS74 KORN 221450 FFHHUN HEADWATER GUIDANCE FOR HSA.....HUNTSVILLE AL NATIONAL WEATHER SERVICE LOWER MISSISSIPPI RIVER FORECAST CENTER, SLIDELL LA 948 AM CDT SAT AUG 22 2026 INCHES OF RAINFALL FOR SPECIFIED DURATIONS REQUIRED TO PRODUCE FLASH FLOODING IN HEADWATERS. .B SIL 260822 Z DH12/DC2608221448 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : :.....ALABAMA : FRYA1 0.9/ 1.2/ 1.6 :FARLEY, AL ALDRIDGE CREEK SHEA1 0.7/ 1.2/ 1.6 :SHERWOOD, AL ALDRIDGE CREEK ATNA1 3.5/ 4.4/ 4.9 :ATHENS, AL LIMESTONE CREEK BPPA1 2.1/ 2.2/ 2.5 :BUCKS POCKET, AL S. SAUTY CREEK MADA1 1.5/ 1.7/ 2.0 :MADISON, AL INDIAN CREEK .END $$  810 FOUS74 KORN 221450 FFHJAN HEADWATER GUIDANCE FOR HSA.....JACKSON MS NATIONAL WEATHER SERVICE LOWER MISSISSIPPI RIVER FORECAST CENTER, SLIDELL LA 948 AM CDT SAT AUG 22 2026 INCHES OF RAINFALL FOR SPECIFIED DURATIONS REQUIRED TO PRODUCE FLASH FLOODING IN HEADWATERS. .B SIL 260822 Z DH12/DC2608221448 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : :.....MISSISSIPPI : MEIM6 3.5/ 5.0/ 5.5 :MERIDIAN, MS SOWASHEE CREEK JCCM6 3.5/ 5.0/ 5.5 :JACKSON, MS CANY CREEK JHMM6 3.5/ 5.0/ 5.5 :JACKSON, MS HANGING MOSS CREEK LYNM6 3.5/ 5.0/ 5.5 :JACKSON, MS LYNCH CREEK TOWM6 3.5/ 5.0/ 5.5 :JACKSON, MS TOWN CREEK UBCM6 3.5/ 5.0/ 5.5 :JACKSON, MS EUBANKS CREEK .END $$  811 FOUS74 KORN 221450 FFHLZK HEADWATER GUIDANCE FOR HSA.....LITTLE ROCK AR NATIONAL WEATHER SERVICE LOWER MISSISSIPPI RIVER FORECAST CENTER, SLIDELL LA 948 AM CDT SAT AUG 22 2026 INCHES OF RAINFALL FOR SPECIFIED DURATIONS REQUIRED TO PRODUCE FLASH FLOODING IN HEADWATERS. .B SIL 260822 Z DH12/DC2608221448 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : :.....ARKANSAS : BTNA4 3.5/ 5.0/ 5.5 :BENTON, AR SALINE R. CIGA4 2.9/ 3.6/ 4.3 :CLINTON, AR S. FK LZKTLE RED R. HDYA4 3.5/ 5.0/ 5.5 :HARDY, AR SPRING R. .END $$  812 FOUS74 KORN 221450 FFHGSP HEADWATER GUIDANCE FOR HSA.....GREENVILLE/SPARTANBURG SC NATIONAL WEATHER SERVICE LOWER MISSISSIPPI RIVER FORECAST CENTER, SLIDELL LA 948 AM CDT SAT AUG 22 2026 INCHES OF RAINFALL FOR SPECIFIED DURATIONS REQUIRED TO PRODUCE FLASH FLOODING IN HEADWATERS. .B SIL 260822 Z DH12/DC2608221448 /DUE/PPHCF/PPTCF/PPQCF/PPKCF/PPDCF : :IDENT 1HR 3HR 6HR 12HR 24HR HEADWATER NAME STREAM :======= ==== ==== ==== ==== ==== ==================== ================== : :.....NORTH CAROLINA : ROSN7 3.4/ 4.2/ 5.5/ 6.0/ 6.5 :ROSMAN, NC FRENCH BROAD R. BLTN7 2.8/ 4.0/ 5.5/ 6.0/ 6.5 :BILTMORE, NC SWANNANOAH R. BIRN7 3.5/ 4.6/ 5.5/ 6.0/ 6.5 :BIRDTOWN, NC OCONALUFTEE R. .END $$  819 FOUS74 KORN 221450 FFHLSX HEADWATER GUIDANCE FOR HSA.....ST. LOUIS MO NATIONAL WEATHER SERVICE LOWER MISSISSIPPI RIVER FORECAST CENTER, SLIDELL LA 948 AM CDT SAT AUG 22 2026 INCHES OF RAINFALL FOR SPECIFIED DURATIONS REQUIRED TO PRODUCE FLASH FLOODING IN HEADWATERS. .B SIL 260822 Z DH12/DC2608221448 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : :.....MISSOURI : ANNM7 3.0/ 3.8/ 4.6 :ANNAPOLIS, MO BLACK R. .END $$  820 FOUS74 KORN 221450 FFHSHV HEADWATER GUIDANCE FOR HSA.....SHREVEPORT LA NATIONAL WEATHER SERVICE LOWER MISSISSIPPI RIVER FORECAST CENTER, SLIDELL LA 948 AM CDT SAT AUG 22 2026 INCHES OF RAINFALL FOR SPECIFIED DURATIONS REQUIRED TO PRODUCE FLASH FLOODING IN HEADWATERS. .B SIL 260822 Z DH12/DC2608221448 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : :.....LOUISIANA : KEIL1 3.5/ 5.0/ 5.5 :KEITHVILLE, LA CYPRESS BAYOU .END $$  821 FOUS74 KORN 221450 FFHRNK HEADWATER GUIDANCE FOR HSA.....BLACKSBURG VA NATIONAL WEATHER SERVICE LOWER MISSISSIPPI RIVER FORECAST CENTER, SLIDELL LA 948 AM CDT SAT AUG 22 2026 INCHES OF RAINFALL FOR SPECIFIED DURATIONS REQUIRED TO PRODUCE FLASH FLOODING IN HEADWATERS. .B SIL 260822 Z DH12/DC2608221448 /DUE/PPHCF/PPTCF/PPQCF/PPKCF/PPDCF : :IDENT 1HR 3HR 6HR 12HR 24HR HEADWATER NAME STREAM :======= ==== ==== ==== ==== ==== ==================== ================== : :.....VIRGINIA : SALV2 2.2/ 2.4/ 2.7/ 3.2/ 4.1 :SALTVILLE, VA N.F. HOLSTON R. SGWN7 1.4/ 1.4/ 1.6/ 2.1/ 3.0 :SUGAR GROVE, NC WATAUGA R. SMFV2 2.8/ 3.0/ 3.3/ 3.8/ 4.6 :SEVEN MILE FORD, VA M.F. HOLSTON R. RLRV2 1.6/ 1.7/ 1.8/ 2.1/ 3.0 :RICHLANDS, VA CLINCH R. .END $$  610 AWUS01 KWNH 221801 FFGMPD NYZ000-PAZ000-WVZ000-OHZ000-222300- Mesoscale Precipitation Discussion 1112 NWS Weather Prediction Center College Park MD 200 PM EDT Sat Aug 22 2026 Areas affected...North & Eastern OH...Western PA...Far Western NY...Far Northern WV... Concerning...Heavy rainfall...Flash flooding possible Valid 221800Z - 222300Z SUMMARY...Multiple rounds of scattered thunderstorms capable of 1-1.5", suggest random intersections resulting in widely scattered spots of 1.5-2.5". Low FFG (<2"/3hrs) and larger urban areas suggest incidents of flash flooding are possible this afternoon into evening. DISCUSSION...GOES-E WV shows broad long-wave trough across the Great Lakes with an upstream strengthening/digging shortwave crossing Lake Michigan which is starting to result a developing triple-point in central LP of MI as the main surface low in NW Lake Huron continues to strengthen. A southern stream wave/vorticity center is well defined across south-central OH helping to direct the effective warm front from near CLE to ZZV and UNI eastward with enhanced low level moisture and higher Theta-E air pooled along it, with MLCAPEs reaching 2000 J/kg, where warm conveyor belt moisture is also peaked around 1.3-1.5" for TPW. Surface to boundary layer convergence from SW to SE across the boundary has resulted in broad convective development though cells updrafts are broadening, they remain widely spaced with some hints of multiple north-south oriented bands. Increased convergence near lake-breeze off Erie, further enhances shower activity. Given the moisture and solid instability rates of 1-1.5" are more likely, but totals will probably be in the 1" range given forward propagation/cell motions eastward are expected. Upstream, initial cluster of thunderstorms over SE MI is sliding into the slightly increased unstable air over north-central OH, while further convergence along the cold front across south-central MI into NE IND is starting to build overall as well. Compared to the warm front, mid-level moisture is a bit less and overall TPWs are closer to 1-1.25" but directional and speed convergence may allow for cells to be comparable to the eastern warm front band, but still similarly progressive and likely to result in peak of 1" totals; so no one cell is likely to exceed even the lower FFG values of 1.5-2"/hr. However, given the increasing coverage and broadening updrafts intersecting footprints from each round may allow for widely scattered spots of 1.5-2.5" by 00z and with 3hr FFG in the 1.5-2" range especially along I-70 in central OH to W PA (~2/3hrs across N Ohio) incidents of exceedance are considered possible this afternoon into evening. Gallina ...Please see www.wpc.ncep.noaa.gov for graphic product... ATTN...WFO...BUF...CLE...CTP...ILN...PBZ...RLX... ATTN...RFC...RHA...TAR...TIR...NWC... LAT...LON 42607899 42237837 41297833 40787882 39067998 38988142 39398255 39898334 40788374 41398370 41718319 41558246 41838140 42168054 42278010  618 FOUS62 KALR 221830 FFGSJU COUNTY FLASH FLOOD GUIDANCE...PUERTO RICO NATIONAL WEATHER SERVICE SOUTHEAST RIVER FORECAST CENTER...ATLANTA GA 230 PM EDT SAT AUG 22 2026 INCHES OF RAINFALL FOR SPECIFIED DURATIONS REQUIRED TO PRODUCE FLASH FLOODING IN FORECAST ZONES. LOWER AMOUNTS MAY CAUSE FLASH FLOODING IN URBAN OR MOUNTAINOUS AREAS. .B ALR 20260822 Z DH18/DC202608221830 /DUE/PPHCF/PPTCF/PPQCF :IDENTIFIERS ARE 2-LETTER STATE, Z FOR ZONE, 3-DIGIT ZONE NUMBER : :IDENT 1HR 3HR 6HR ZONE NAME :======= ==== ==== ==== ==================== PRZ001 1.9/ 3.6/ 4.9 PRZ002 1.9/ 3.6/ 4.9 PRZ003 1.9/ 3.4/ 4.8 PRZ004 1.9/ 3.4/ 4.8 PRZ005 1.6/ 2.2/ 2.9 PRZ006 1.6/ 2.2/ 2.9 PRZ007 1.6/ 2.2/ 2.9 PRZ008 1.6/ 2.2/ 2.9 PRZ009 1.6/ 2.2/ 2.9 PRZ010 1.6/ 2.2/ 2.9 PRZ011 1.6/ 2.2/ 2.9 PRZ012 2.0/ 3.2/ 4.5 PRZ013 2.0/ 3.2/ 4.5 VIZ001 2.1/ 3.3/ 4.6 VIZ002 2.1/ 3.3/ 4.6 .END $$ S.E.R.F.C. 770-486-0028 or 770-282-2112 Regular Hours 6am-10pm Eastern Time After Hours Please Follow Callback Instructions  874 FOUS71 KRHA 221950 FFHNJ1 HEADWATER STATEMENT FOR NEW JERSEY STREAMS MIDDLE ATLANTIC RIVER FORECAST CENTER NATIONAL WEATHER SERVICE STATE COLLEGE PA 330 PM EDT SAT AUG 22 2026 APPROXIMATE 1/3/6/12-HR BASIN AVERAGED RAINFALL (INCHES) REQUIRED TO CAUSE MINOR, MODERATE, AND MAJOR FLOODING AT THE INDICATED HEADWATER LOCATIONS. .B RHA 260822 Z DH18/DC2608221930/DUE/PPHCF/PPTCF/PPQCF/PPKCF : :IDENT 1HR 3HR 6HR 12HR HEADWATER NAME STREAM :======= ==== ==== ==== ==== ==================== ================== : : NWS BROOKHAVEN SERVICE AREA... : Ramapo River... MAWN4 2.1/ 2.4/ 2.8/ 3.2 :Mahwah (8ft) Ramapo River :MAWN4md 2.4/ 2.7/ 3.3/ 3.8 Mahwah (9) Ramapo River :MAWN4mj 3.4/ 3.8/ 4.9/ 5.5 Mahwah (12) Ramapo River : Hohokus Brook... HOHN4 1.0/ 1.2/ 1.6/ 2.4 :Ho-Ho-Kus (3ft) Hohokus Brook : Saddle River... LODN4 1.1/ 1.2/ 1.3/ 1.9 :Lodi (5.5ft) Saddle River :LODN4md 1.6/ 1.6/ 1.9/ 2.7 Lodi (7) Saddle River :LODN4mj 1.9/ 1.9/ 2.2/ 3.2 Lodi (8) Saddle River : Rahway River... SPGN4 1.5/ 1.5/ 1.7/ 2.1 :Springfield (5.5ft) Rahway River : : NWS MT. HOLLY SERVICE AREA... : PASSAIC BASIN... : Passaic River... CAMN4 2.7/ 2.8/ 3.6/ 4.0 :Chatham (6ft) Passaic River :CAMN4md 4.9/ 5.0/ 5.9/ 6.5 Chatham (7.2) Passaic River :CAMN4mj 5.6/ 5.9/ 6.8/ 7.7 Chatham (8.2) Passaic River : Rockaway River... BOTN4 3.6/ 4.1/ 4.6/ 5.6 :Boonton Abv. (5ft) Rockaway River :BOTN4md 4.1/ 4.7/ 5.3/ 6.6 Boonton Abv. (6) Rockaway River :BOTN4mj 4.4/ 5.0/ 5.8/ 7.2 Boonton Abv. (7) Rockaway River : Whippany River... WHIN4 2.1/ 2.3/ 2.6/ 2.8 :Morristown (6ft) Whippany River : RARITAN BASIN.. : South Branch Raritan River... STTN4 2.3/ 2.4/ 3.0/ 3.3 :Stanton (8ft) S. Br. Raritan River :STTN4md 2.4/ 2.6/ 3.5/ 4.1 Stanton (10) S. Br. Raritan River :STTN4mj 2.7/ 2.9/ 4.1/ 4.8 Stanton (12) S. Br. Raritan River : North Branch Raritan River... RRTN4 1.9/ 2.1/ 2.5/ 3.0 :Raritan (10ft) N. Br. Raritan River :RRTN4md 2.1/ 2.4/ 2.9/ 3.7 Raritan (12) N. Br. Raritan River :RRTN4mj 2.5/ 2.9/ 3.7/ 4.6 Raritan (15) N. Br. Raritan River : Millstone River... BKWN4 3.0/ 3.3/ 3.6/ 3.6 :Blackwells Mills(9ft) Millstone River :BKWN4md 3.1/ 3.3/ 3.7/ 3.7 Blackwells Mills(10) Millstone River :BKWN4mj 3.5/ 3.8/ 4.2/ 5.0 Blackwells Mills(15) Millstone River : DELAWARE BASIN... : Assunpink Creek...TACN4 2.2/ 2.3/ 2.7/ 3.3 :Trenton (8.5ft) Assunpink Creek :TACN4md 2.3/ 2.5/ 3.3/ 3.7 Trenton (9.5) Assunpink Creek :TACN4mj 2.4/ 2.8/ 3.6/ 4.3 Trenton (11) Assunpink Creek .END $$ NNNN $$ NNNN  875 FOUS71 KRHA 221950 FFHPA2 HEADWATER STATEMENT FOR THE DELAWARE AND SUSQUEHANNA BASINS MIDDLE ATLANTIC RIVER FORECAST CENTER NATIONAL WEATHER SERVICE STATE COLLEGE PA 330 PM EDT SAT AUG 22 2026 APPROXIMATE 1/3/6/12-HR BASIN AVERAGED RAINFALL (INCHES) REQUIRED TO CAUSE MINOR, MODERATE, AND MAJOR FLOODING AT THE INDICATED HEADWATER LOCATIONS. .B RHA 260822 Z DH18/DC2608221930/DUE/PPHCF/PPTCF/PPQCF/PPKCF : :IDENT 1HR 3HR 6HR 12HR HEADWATER NAME :======= ==== ==== ==== ==== ==================== : : NWS BINGHAMTON SERVICE AREA... : SUSQUEHANNA BASIN... : Tioughnioga River... CRTN6 2.6/ 2.9/ 3.2/ 3.5 :Cortland (8ft) :CRTN6md 2.7/ 3.1/ 3.9/ 4.3 Cortland (10) :CRTN6mj 2.9/ 3.4/ 4.4/ 5.0 Cortland (12.5) : Chenango River... SHBN6 2.7/ 2.9/ 3.1/ 3.6 :Sherburne (8.5ft) :SHBN6md 2.7/ 3.0/ 3.4/ 4.4 Sherburne (9) :SHBN6mj 2.9/ 3.2/ 3.9/ 4.8 Sherburne (10.6) : Otselic River... CINN6 3.1/ 3.3/ 3.8/ 4.7 :Cincinnatus (9ft) : ...moderate and major flood stages above rating table. : Cohocton River... CMPN6 2.9/ 3.2/ 3.7/ 4.5 :Campbell (8ft) :CMPN6md 3.1/ 3.5/ 4.6/ 5.2 Campbell (10) :CMPN6mj 3.3/ 3.8/ 5.1/ 5.8 Campbell (11) : Canisteo River... WCRN6 2.2/ 2.5/ 3.1/ 3.9 :West Cameron (17ft) :WCRN6md 2.3/ 2.6/ 3.3/ 4.1 West Cameron (18) :WCRN6mj 2.5/ 2.9/ 3.8/ 4.9 West Cameron (21) : Towanda Creek... MONP1 1.8/ 2.0/ 2.5/ 3.1 :Monroeton (15.5ft) :MONP1md 2.0/ 2.2/ 2.7/ 3.4 Monroeton (17) :MONP1mj 2.2/ 2.4/ 3.1/ 3.9 Monroeton (18.5) : Tunkhannock Creek... TNKP1 2.4/ 2.8/ 4.1/ 4.7 :Tunkhannock (11ft) :TNKP1md 2.5/ 3.1/ 4.5/ 5.4 Tunkhannock (14) :TNKP1mj 2.7/ 3.4/ 5.0/ 6.0 Tunkhannock (17) : Lackawanna River... OFRP1 2.4/ 2.8/ 3.4/ 4.6 :Old Forge (11ft) :OFRP1md 2.5/ 2.9/ 3.6/ 4.9 Old Forge (13) :OFRP1mj 2.7/ 3.2/ 4.0/ 5.3 Old Forge (16) : DELAWARE BASIN... : East Branch Delaware River... MRGN6 3.7/ 4.0/ 4.6/ 5.1 :Margaretville (11ft) :MRGN6md 4.3/ 4.8/ 5.5/ 6.3 Margaretville (12) :MRGN6mj 5.0/ 5.7/ 6.7/ 7.8 Margaretville (13) : West Branch Delaware River... WALN6 2.6/ 2.7/ 3.0/ 3.5 :Walton (11.5ft) :WALN6md 2.9/ 3.1/ 3.6/ 4.0 Walton (14) :WALN6mj 3.5/ 3.8/ 4.3/ 4.9 Walton (16) : Beaverkill Creek... CKFN6 1.9/ 2.0/ 2.3/ 2.8 :Cooks Falls (10ft) :CKFN6md 2.7/ 2.9/ 3.7/ 4.7 Cooks Falls (16) :CKFN6mj 3.1/ 3.4/ 4.4/ 5.8 Cooks Falls (18) : Lackawaxen River... HWYP1 2.5/ 2.8/ 3.4/ 4.2 :Hawley (14ft) :HWYP1md 3.2/ 3.6/ 4.4/ 5.5 Hawley (20) :HWYP1mj 3.5/ 3.9/ 4.8/ 6.0 Hawley (22) : : NWS STATE COLLEGE SERVICE AREA... : SUSQUEHANNA BASIN... : Tioga River... MFDP1 1.9/ 2.5/ 3.5/ 4.2 :Mansfield (12ft) :MFDP1md 2.0/ 2.7/ 3.9/ 4.6 Mansfield (13) :MFDP1mj 2.2/ 3.0/ 4.4/ 5.2 Mansfield (14) : Penns Creek... PNCP1 2.8/ 3.1/ 3.3/ 3.7 :Penns Creek (8ft) :PNCP1md 2.9/ 3.3/ 3.8/ 4.6 Penns Creek (10) :PNCP1mj 3.2/ 3.7/ 4.5/ 5.6 Penns Creek (12) : Frankstown Branch Juniata River... WIBP1 1.8/ 2.0/ 2.2/ 2.2 :Williamsburg (12ft) :WIBP1md 1.8/ 2.0/ 2.3/ 2.5 Williamsburg (13) :WIBP1mj 1.9/ 2.1/ 2.5/ 3.0 Williamsburg (15) : Little Juniata River... SPKP1 1.6/ 1.6/ 1.8/ 1.9 :Spruce Creek (8ft) :SPKP1md 1.7/ 1.8/ 2.0/ 2.2 Spruce Creek (10) :SPKP1mj 2.1/ 2.2/ 2.7/ 3.0 Spruce Creek (14) : Aughwick Creek... SLYP1 1.6/ 1.7/ 1.9/ 2.2 :Shirleysburg (10ft) :SLYP1md 1.8/ 1.9/ 2.2/ 2.6 Shirleysburg (12) :SLYP1mj 4.0/ 4.3/ 5.1/ 6.9 Shirleysburg (20) : Sherman Creek... SMDP1 2.3/ 2.6/ 3.1/ 3.7 :Shermans Dale (9ft) :SMDP1md 2.6/ 3.0/ 3.6/ 4.2 Shermans Dale (11) :SMDP1mj 3.9/ 4.6/ 5.5/ 6.3 Shermans Dale (16) : Conodoguinet Creek... HGSP1 3.3/ 3.4/ 3.5/ 3.5 :Hogestown (8ft) :HGSP1md 3.5/ 3.7/ 4.5/ 5.0 Hogestown (10) :HGSP1mj 3.8/ 4.3/ 5.2/ 5.8 Hogestown (12) : Yellow Breeches Creek... CPHP1 1.9/ 2.2/ 2.6/ 4.0 :Camp Hill (7ft) :CPHP1md 2.0/ 2.4/ 2.9/ 4.3 Camp Hill (9) :CPHP1mj 2.5/ 2.9/ 3.9/ 5.4 Camp Hill (13) : Swatara Creek... HTVP1 2.0/ 2.4/ 3.0/ 4.2 :Harper Tavern (9ft) :HTVP1md 2.3/ 2.8/ 3.7/ 5.2 Harper Tavern (12) :HTVP1mj 2.7/ 3.3/ 4.2/ 6.0 Harper Tavern (15) : Conestoga River... LNCP1 1.8/ 2.1/ 2.2/ 3.1 :Lancaster (11ft) :LNCP1md 1.9/ 2.3/ 2.5/ 3.5 Lancaster (13) :LNCP1mj 2.1/ 2.5/ 2.9/ 3.9 Lancaster (15) : DELAWARE BASIN... : Schuylkill River... LGVP1 2.7/ 2.8/ 2.9/ 3.1 :Landingville (8ft) :LGVP1md 3.4/ 3.7/ 3.9/ 4.3 Landingville (12) :LGVP1mj 4.2/ 4.6/ 4.9/ 5.4 Landingville (14) : : NWS MT. HOLLY SERVICE AREA... : DELAWARE BASIN... : Schuylkill River... BREP1 3.0/ 3.9/ 4.8/ 6.1 :Berne (12ft) :BREP1md 3.3/ 4.3/ 5.4/ 7.0 Berne (14) :BREP1mj 3.7/ 4.8/ 5.9/ 7.7 Berne (16) : Bush Kill... SHOP1 2.7/ 3.3/ 3.5/ 3.6 :Shoemakers (6ft) :SHOP1md 2.9/ 3.5/ 4.1/ 4.6 Shoemakers (7) :SHOP1mj 3.1/ 3.7/ 4.6/ 5.2 Shoemakers (8) : Brodhead Creek... MNSP1 1.9/ 2.2/ 2.9/ 3.8 :Minisink Hills(10ft) :MNSP1md 2.0/ 2.4/ 3.2/ 4.2 Minisink Hills(12) :MNSP1mj 2.2/ 2.7/ 3.8/ 4.9 Minisink Hills(15) : Little Lehigh Creek...APAP1 4.4/ 4.7/ 5.2/ 6.1 :Allentown-10th (8ft) :APAP1md 5.4/ 5.8/ 6.4/ 7.7 Allentown-10th (10) :APAP1mj 6.4/ 6.9/ 7.4/ 8.0 Allentown-10th (12) : Perkiomen Creek... GRAP1 1.8/ 2.2/ 2.8/ 3.5 :Graterford (11ft) :GRAP1md 2.0/ 2.4/ 3.3/ 3.9 Graterford (13) :GRAP1mj 2.3/ 2.8/ 3.8/ 4.6 Graterford (16) : Neshaminy Creek... LNGP1 2.5/ 2.5/ 2.5/ 2.5 :Langhorne (9ft) :LNGP1md 2.8/ 2.8/ 3.0/ 3.1 Langhorne (10) :LNGP1mj 2.9/ 3.1/ 3.5/ 3.8 Langhorne (12) : Chester Creek... CHSP1 1.8/ 1.9/ 2.1/ 2.7 :Chester (8ft) :CHSP1md 2.3/ 2.4/ 2.7/ 3.4 Chester (10) :CHSP1mj 3.2/ 3.3/ 3.7/ 4.7 Chester (14) : West Branch Brandywine Creek... MODP1 3.8/ 4.0/ 4.4/ 4.6 :Modena (9ft) :MODP1md 4.4/ 4.6/ 5.0/ 5.3 Modena (10) :MODP1mj 6.5/ 7.0/ 7.4/ 8.0 Modena (12) : East Branch Brandywine Creek... DWNP1 1.1/ 1.2/ 1.2/ 1.3 :Downingtown (7ft) :DWNP1md 1.8/ 1.8/ 1.9/ 2.2 Downingtown (9) :DWNP1mj 2.7/ 2.7/ 2.9/ 3.2 Downingtown (11) : Brandywine Creek... CDFP1 2.0/ 2.0/ 2.1/ 2.4 :Chadds Ford (9ft) :CDFP1md 2.2/ 2.3/ 2.7/ 3.4 Chadds Ford (11) :CDFP1mj 2.4/ 2.6/ 3.4/ 4.1 Chadds Ford (13) : Christina River... CHBD1 1.5/ 1.6/ 1.9/ 2.7 :Coochs Brdg(11ft) :CHBD1md 1.8/ 2.0/ 2.4/ 3.4 Coochs Brdg(12) :CHBD1mj 2.5/ 2.7/ 3.2/ 4.4 Coochs Brdg(13) : White Clay Creek... DPKD1 1.6/ 1.7/ 1.9/ 2.5 :Delaware Pk (13ft) :DPKD1md 2.3/ 2.4/ 2.6/ 3.3 Delaware Pk (15) :DPKD1mj 3.3/ 3.5/ 3.8/ 4.9 Delaware Pk (16.5) : Red Clay Creek... RCCD1 1.8/ 2.1/ 2.3/ 2.8 :Wooddale (7ft) :RCCD1md 2.5/ 2.8/ 3.2/ 3.8 Wooddale (8.5) :RCCD1mj 3.2/ 3.5/ 3.9/ 4.8 Wooddale (10) .END :=============================================================== : EXPERIMENTAL NON-FCST POINT RAW MODEL OUTPUT : NO MANUAL QC OR ADJUSTMENTS APPLIED...USE WITH CAUTION :=============================================================== : : NWS BINGHAMTON SERVICE AREA... .B RHA 260822 Z DH18/DC2608221930/DUE/PPHCF/PPTCF/PPQCF/PPKCF :GageID 1hr 3hr 6hr 12hr rainfall for indicated stages : Lackawanna River... ARHP1 4.0/ 4.1/ 4.5/ 5.3 :Archbald (8ft) :ARHP1md 4.6/ 4.7/ 5.2/ 6.3 Archbald (9) :ARHP1mj 5.2/ 5.4/ 5.9/ 7.3 Archbald (10) PKIP1 4.4/ 4.5/ 4.7/ 5.2 :Scranton (12.5ft.) :PKIP1md 4.7/ 4.8/ 5.0/ 5.5 Scranton (14) :PKIP1mj 4.9/ 5.0/ 5.2/ 5.7 Scranton (15) .END : Model-simulated 3-hourly stage forecasts including QPF... .E ARHP1 20260822 DC2608221950/DH21/HGIFX/DIH3/ .E1 1.8/1.9/1.9/1.9/2.0/2.1/2.2/2.3 .E PKIP1 20260822 DC2608221950/DH21/HGIFX/DIH3/ .E1 1.2/1.2/1.3/1.4/1.5/1.7/1.9/2.0 $$ NNNN  876 FOUS71 KRHA 221950 FFHVA2 HEADWATER STATEMENT FOR THE POTOMAC AND JAMES BASINS MIDDLE ATLANTIC RIVER FORECAST CENTER NATIONAL WEATHER SERVICE STATE COLLEGE PA 330 PM EDT SAT AUG 22 2026 APPROXIMATE 1/3/6/12-HR BASIN AVERAGED RAINFALL (INCHES) REQUIRED TO CAUSE MINOR, MODERATE, AND MAJOR FLOODING AT THE INDICATED HEADWATER LOCATIONS. .B RHA 260822 Z DH18/DC2608221930/DUE/PPHCF/PPTCF/PPQCF/PPKCF : :IDENT 1HR 3HR 6HR 12HR HEADWATER NAME :======= ==== ==== ==== ==== ==================== : : NWS STERLING SERVICE AREA... : POTOMAC BASIN... : North Branch Potomac River... KITM2 2.2/ 2.4/ 2.9/ 3.6 :Kitzmiller (9ft) :KITM2md 3.0/ 3.4/ 4.2/ 5.6 Kitzmiller (11) :KITM2mj 4.4/ 4.9/ 6.3/ 8.0 Kitzmiller (13) : Georges Creek... WSTM2 1.3/ 1.4/ 1.7/ 2.0 :Westernport (8ft) :WSTM2md 1.9/ 2.2/ 2.5/ 3.0 Westernport (10) :WSTM2mj 2.6/ 2.9/ 3.4/ 3.9 Westernport (12) : South Branch Potomac River... FKLW2 2.2/ 2.4/ 2.7/ 3.5 :Franklin (7ft) :FKLW2md 2.3/ 2.7/ 3.0/ 4.0 Franklin (9) :FKLW2mj 2.5/ 3.0/ 3.3/ 4.7 Franklin (11) : Opequon Creek... MBGW2 2.6/ 3.3/ 3.8/ 4.9 :Martinsburg (10ft) :MBGW2md 2.8/ 3.6/ 4.1/ 5.7 Martinsburg (12.5) :MBGW2mj 3.2/ 4.0/ 4.9/ 6.6 Martinsburg (15) : South River... WAYV2 3.5/ 4.3/ 5.7/ 7.2 :Waynesboro (9.5ft) :WAYV2md 3.7/ 4.6/ 6.2/ 7.9 Waynesboro (11) :WAYV2mj 4.1/ 5.0/ 7.0/ 8.0 Waynesboro (13) : North Fork Shenandoah River... COOV2 2.6/ 2.9/ 3.8/ 4.5 :Cootes Store (15ft) :COOV2md 3.0/ 3.4/ 4.6/ 5.5 Cootes Store (18) :COOV2mj 3.5/ 3.9/ 5.5/ 6.7 Cootes Store (21) : Antietam Creek... SACM2 2.3/ 3.0/ 4.0/ 5.8 :Sharpsburg (8ft) :SACM2md 2.4/ 3.2/ 4.8/ 6.4 Sharpsburg (10) :SACM2mj 2.5/ 3.5/ 5.5/ 7.2 Sharpsburg (12) : Seneca Creek... DAWM2 2.6/ 2.7/ 3.1/ 3.8 :Dawsonville (7.5ft) :DAWM2md 3.1/ 3.6/ 4.8/ 6.1 Dawsonville (11) :DAWM2mj 5.1/ 6.0/ 7.4/ 8.0 Dawsonville (16) : : NWS BLACKSBURG SERVICE AREA... : Maury River... BVSV2 4.6/ 6.5/ 7.4/ 8.0 :Buena Vista (17ft) :BVSV2cs 4.2/ 5.6/ 7.0/ 8.0 Buena Vista (13) :BVSV2md 4.8/ 6.8/ 7.4/ 8.0 Buena Vista (19) :BVSV2mj 5.1/ 7.0/ 7.4/ 8.0 Buena Vista (21) .END : :=============================================================== : EXPERIMENTAL NON-FCST POINT RAW MODEL OUTPUT : NO MANUAL QC OR ADJUSTMENTS APPLIED...USE WITH CAUTION :=============================================================== : : NWS STERLING SERVICE AREA... : Rock Creek at Sherrill Drive.,Washington DC .B RHA 260822 Z DH18/DC2608221930/DUE/PPHCF/PPTCF/PPQCF/PPKCF :GageID 1hr 3hr 6hr 12hr rainfall for indicated stages RCKD2 1.8/ 1.9/ 2.1/ 2.5 :Washington, DC (7ft) :RCKD2md 2.4/ 2.7/ 3.0/ 3.6 Washington, DC (10) :RCKD2mj 3.2/ 3.5/ 3.9/ 4.7 Washington, DC (12) .END : Model-simulated 3-hourly stage forecasts including QPF... .E RCKD2 20260822 DC2608221950/DH21/HGIFX/DIH3/ .E1 2.0/2.0/2.1/2.3/2.4/2.3/2.2/2.1 $$ NNNN  403 FOUS73 KMSR 222000 FFHLSX HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 300 PM CDT SAT AUG 22 2026 ST LOUIS HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH18/DC2608222000 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** MISSOURI HEADWATER POINTS *** : EWNM7 3.0/ 3.4/ 3.8 :EWING MO 5E NORTH FABIUS R EWMM7 3.0/ 3.4/ 3.8 :EWING MO 1NNE MIDDLE FABIUS R PALM7 1.8/ 2.0/ 2.3 :PALMYRA MO NORTH R TAYM7 1.8/ 2.3/ 2.9 :TAYLOR MO S FABIUS R PMZM7 2.3/ 2.6/ 3.0 :HOLLIDAY MO 2N MI FK SALT R TRYM7 1.6/ 1.7/ 1.9 :TROY MO CUIVRE R DRCM7 1.9/ 2.1/ 2.2 :ST PETERS MO DARDENNE CR LSLM7 2.1/ 2.3/ 2.6 :LAKE SAINT LOUIS PERUQUE CR - ABOVE LSTM7 1.6/ 1.8/ 2.0 :LAKE ST LOUIS MO PERUQUE CR CSNM7 1.5/ 1.6/ 1.7 :COOK STATION MO 1N MERAMEC R SEEM7 1.4/ 1.6/ 1.9 :STEELVILLE MO 2N MERAMEC R UNNM7 3.2/ 3.3/ 3.6 :UNION MO BOURBEUSE R BYRM7 2.7/ 3.1/ 3.6 :BYRNESVILLE MO 2NNE BIG R .END $$  404 FOUS73 KMSR 222000 FFHMKX HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 300 PM CDT SAT AUG 22 2026 MILWAUKEE HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH18/DC2608222000 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** WISCONSIN HEADWATER POINTS *** : AFTW3 2.1/ 2.5/ 3.0 :AFTON WI ROCK R BCHW3 1.9/ 2.0/ 2.4 :BLANCHARDVILLE WI E BR PECATONICA R BUNW3 2.4/ 2.6/ 3.1 :BUNCOMBE WI GALENA R DARW3 2.4/ 2.6/ 3.3 :DARLINGTON WI PECATONICA R MTNW3 1.7/ 1.9/ 2.8 :MARTINTOWN WI PECATONICA R MAZW3 2.2/ 2.3/ 2.9 :MAZOMANIE WI BLACK EARTH CR KINW3 2.9/ 3.5/ 4.3 :MILWAUKEE WI KINNICKINNIC R SEBW3 2.6/ 2.9/ 3.5 :SHEBOYGAN WI SHEBOYGAN R WKEW3 3.1/ 3.2/ 3.2 :WAUKESHA WI FOX R WWTW3 3.3/ 3.6/ 3.8 :WAUWATOSA WI MENOMONEE R BLOW3 1.6/ 1.7/ 1.9 :BELOIT WI TURTLE CR MFSW3 0.5/ 1.0/ 1.0 :MENOMONEE FALLS WI MENOMONEE R OAKW3 2.0/ 2.1/ 2.6 :SOUTH MILWAUKEE OAK CR .END $$  405 FOUS73 KMSR 222000 FFHLOT HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 300 PM CDT SAT AUG 22 2026 CHICAGO HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH18/DC2608222000 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** ILLINOIS HEADWATER POINTS *** : NBPI2 2.5/ 2.6/ 2.9 :CHICAGO IL N BR CHICAGO R CDCI2 1.0/ 1.3/ 1.5 :CHICAGO HEIGHTS IL DEER CR DRFI2 2.4/ 2.7/ 3.8 :DEERFIELD IL N BR CHICAGO R DEKI2 3.5/ 4.0/ 4.5 :DE KALB IL S BR KISHWAUKEE R DSPI2 3.0/ 3.1/ 3.2 :DES PLAINES IL DES PLAINES R WLRI2 2.9/ 3.4/ 3.8 :DES PLAINES IL WELLER CR EMHI2 2.6/ 3.1/ 3.5 :ELMHURST IL SALT CR FLSI2 1.1/ 1.4/ 1.7 :FLOSSMOOR IL BUTTERFIELD CR GLWI2 1.4/ 1.8/ 2.2 :GLENWOOD IL THORN CR GUNI2 2.6/ 2.6/ 2.6 :GURNEE IL DES PLAINES R JHCI2 2.4/ 2.6/ 2.8 :JOLIET IL HICKORY CR LAFI2 2.4/ 2.8/ 3.8 :LAKE FOREST IL SKOKIE R NILI2 3.5/ 4.0/ 4.5 :NILES IL N BR CHICAGO R NBRI2 3.5/ 4.0/ 4.5 :NORTHBROOK IL W FK N BR CHICAGO R OAKI2 3.0/ 3.1/ 3.5 :OAK FOREST IL MIDLOTHIAN CR MCDI2 3.2/ 3.6/ 4.0 :PROSPECT HTS IL MCDONALD CR ALPI2 1.3/ 1.5/ 1.7 :ROCKFORD IL ALPINE DAM-KEITH CR LEVI2 1.7/ 2.0/ 2.5 :ROCKFORD IL LEVINGS LAKE PPLI2 1.8/ 2.2/ 2.7 :ROCKFORD IL PAGE PARK LAKE ROLI2 2.8/ 3.3/ 3.7 :ROLLING MEADOWS IL SALT CR SCHI2 3.5/ 3.9/ 4.5 :ST CHARLES IL FERSON CR SORI2 3.5/ 3.6/ 3.8 :SHOREWOOD IL DU PAGE R THNI2 1.2/ 1.2/ 1.2 :THORNTON IL THORN CR WHEI2 2.9/ 3.1/ 3.3 :WHEELING IL BUFFALO CR WLSI2 3.5/ 4.0/ 4.5 :WILLOW SPRINGS IL FLAG CR YRKI2 2.5/ 2.6/ 2.6 :YORKVILLE IL BLACKBERRY CR : : *** INDIANA HEADWATER POINTS *** : HDDI3 3.5/ 4.0/ 4.5 :DYER IN HART DITCH MNTI3 3.4/ 3.4/ 3.4 :MUNSTER IN HART DITCH LCMI3 2.7/ 2.7/ 2.7 :MUNSTER IN LITTLE CALUMET R PRTI3 1.9/ 1.9/ 1.9 :PORTER IN LITTLE CALUMET R .END $$  406 FOUS73 KMSR 222000 FFHILX HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 300 PM CDT SAT AUG 22 2026 LINCOLN HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH18/DC2608222000 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** ILLINOIS HEADWATER POINTS *** : BMII2 3.5/ 4.0/ 4.5 :BLOOMINGTON IL SUGAR CR RLLI2 0.5/ 1.0/ 1.0 :ROWELL IL SALT CR .END $$  407 FOUS73 KMSR 222000 FFHMPX HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 300 PM CDT SAT AUG 22 2026 TWIN CITIES HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH18/DC2608222000 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** MINNESOTA HEADWATER POINTS *** : SNCM5 2.5/ 2.7/ 2.9 :JORDAN MN SAND CR PNLM5 3.2/ 3.8/ 4.5 :PINE ISLAND MN MID FK ZUMBRO R PILM5 3.5/ 4.0/ 4.5 :PINE ISLAND MN N B MID FK ZUMBRO R WGOM5 3.5/ 4.0/ 4.5 :WANAMINGO MN NO FK ZUMBRO R .END $$  409 FOUS73 KMSR 222000 FFHFGF HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 300 PM CDT SAT AUG 22 2026 GRAND FORKS HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH18/DC2608222000 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** MINNESOTA HEADWATER POINTS *** : CSRM5 3.5/ 4.0/ 4.1 :CAMPBELL MN 1W SO FK RABBIT R MALM5 3.5/ 3.8/ 4.5 :MALUNG MN 2NW ROSEAU R BLO SO FK : : *** NORTH DAKOTA HEADWATER POINTS *** : DWGN8 3.5/ 4.0/ 4.5 :DWIGHT ND 1NE ANTELOPE CR HGRN8 3.5/ 4.0/ 4.5 :HILLSBORO ND GOOSE R LTRN8 2.6/ 2.7/ 3.0 :LARIMORE ND 5ENE TURTLE R .END $$  411 FOUS73 KMSR 222000 FFHARX HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 300 PM CDT SAT AUG 22 2026 LA CROSSE HYDRLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH18/DC2608222000 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** IOWA HEADWATER POINTS *** : DEHI4 3.5/ 4.0/ 4.5 :DECORAH IA UPPER IOWA R DCHI4 2.8/ 3.1/ 3.7 :DORCHESTER IA UPPER IOWA R GRBI4 2.3/ 2.5/ 2.7 :GARBER IA TURKEY R : : *** MINNESOTA HEADWATER POINTS *** : ASTM5 2.4/ 2.6/ 3.0 :AUSTIN WWTP MN CEDAR R DOBM5 2.8/ 3.0/ 3.2 :AUSTIN MN-21ST DOBBINS CR TRCM5 3.2/ 3.6/ 4.3 :AUSTIN MN-41 AV NW TURTLE CR HOUM5 2.1/ 2.4/ 2.9 :HOUSTON MN ROOT R LNSM5 3.1/ 3.5/ 3.9 :LANESBORO MN S BR ROOT R LANM5 2.8/ 3.0/ 3.3 :LANSING MN CEDAR R PTNM5 3.1/ 3.3/ 4.1 :PRESTON MN S BR ROOT R RBCM5 3.5/ 3.9/ 4.4 :ROCHESTER MN BEAR CR RCCM5 3.3/ 3.6/ 4.2 :ROCHESTER MN CASCADE CR ROCM5 3.5/ 4.0/ 4.5 :ROCHESTER MN SILVER CR RCSM5 3.5/ 4.0/ 4.5 :HWY 14 ROCHESTER S FK ZUMBRO R RCHM5 3.4/ 3.9/ 4.5 :ROCHESTER MN S FK ZUMBRO R WSPM5 2.9/ 3.1/ 3.7 :WHITEWATER ST.PK MFK WHITEWATER R ZUMM5 3.3/ 4.0/ 4.5 :ZUMBRO FALLS MN ZUMBRO R : : *** WISCONSIN HEADWATER POINTS *** : BTNW3 2.1/ 2.2/ 2.2 :BURTON WI GRANT R DDGW3 3.5/ 3.6/ 3.7 :DODGE WI TREMPEALEAU R GMIW3 3.2/ 3.4/ 3.7 :GAYS MILLS WI KICKAPOO R HILW3 2.0/ 2.1/ 2.3 :HILLSBORO WWTP WI S BR BARABOO R LAFW3 2.5/ 2.7/ 2.8 :LA FARGE WI KICKAPOO R NEIW3 2.7/ 3.5/ 4.3 :NEILLSVILLE WI BLACK R ONTW3 2.5/ 2.6/ 2.7 :ONTARIO WI KICKAPOO R REAW3 2.8/ 2.9/ 3.1 :READSTOWN WI KICKAPOO R RVLW3 2.8/ 2.9/ 3.1 :ROCKVILLE WI 2E PLATTE R SOGW3 2.6/ 2.7/ 2.8 :SOLDIERS GROVE WI KICKAPOO R STEW3 2.9/ 3.0/ 3.1 :STEUBEN WI KICKAPOO R VIOW3 2.6/ 2.7/ 2.8 :VIOLA WI KICKAPOO R .END $$  410 FOUS73 KMSR 222000 FFHDMX HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 300 PM CDT SAT AUG 22 2026 DES MOINES HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH18/DC2608222000 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** IOWA HEADWATER POINTS *** : AKWI4 2.9/ 2.9/ 3.1 :ACKWORTH IA SOUTH R AMWI4 2.9/ 2.9/ 3.0 :AMES IA IOWAY CR BSSI4 2.8/ 2.9/ 3.2 :BUSSEY IA CEDAR CR DFMI4 3.4/ 3.5/ 3.6 :DSM-EASTON FOUR MILE CR CLVI4 2.7/ 2.9/ 3.1 :CLIVE I-80/35 WALNUT CR DOSI4 2.8/ 2.9/ 3.3 :DSM-63RD ST WALNUT CR MCWI4 3.5/ 3.7/ 4.2 :MASON CITY IA WINNEBAGO R .END $$  412 FOUS73 KMSR 222000 FFHAPX HEADWATER FLASH FLOOD GUIDANCE NWS NORTH CENTRAL RIVER FORECAST CENTER TWIN CITIES/CHANHASSEN MN 300 PM CDT SAT AUG 22 2026 GAYLORD HYDROLOGIC SERVICE AREA AVERAGE INCHES OF RAINFALL FOR GIVEN DURATIONS REQUIRED TO INITIATE FLASH FLOODING AT THE INDICATED LOCATIONS. .B MSR 260822 Z DH18/DC2608222000 /DUE/PPHCF/PPTCF/PPQCF : :IDENT 1HR 3HR 6HR HEADWATER NAME STREAM :======= ==== ==== ==== ==================== ================== : : *** MICHIGAN HEADWATER POINTS *** : BVTM4 3.5/ 4.0/ 4.5 :BEAVERTON MI TOBACCO R MYFM4 3.5/ 4.0/ 4.3 :MAYFIELD MI BOARDMAN R RUDM4 3.5/ 4.0/ 4.5 :RUDYARD MI PINE RIVER .END $$  460 AWUS01 KWNH 222049 FFGMPD NEZ000-COZ000-NMZ000-WYZ000-UTZ000-230215- Mesoscale Precipitation Discussion 1113 NWS Weather Prediction Center College Park MD 448 PM EDT Sat Aug 22 2026 Areas affected...central Rockies into the High Plains Concerning...Heavy rainfall...Flash flooding possible Valid 222046Z - 230215Z SUMMARY...Slow moving thunderstorms will be capable of isolated to scattered flash flooding across the central Rockies into the adjacent High Plains through the evening. Rainfall totals of 0.5 to 1.0 inches in 15-30 minutes with 1-2 inch totals are expected. DISCUSSION...2030Z visible satellite and area radar imagery showed widely scattered thunderstorms underway across northern NM into eastern UT, western/central CO and southeastern WY into the adjacent High Plains of WY/CO. The environment across the region contained near average to 150 percent above average moisture per blended TPW imagery from 19Z. MLCAPE was relatively weak over the terrain, about 250-750 J/kg per SPC mesoanalysis data and the 18Z GJT sounding. Instability was higher but mostly capped across the High Plains due to warm temperatures near 700 mb and insufficient moisture in that layer. However, the Rockies were also situated beneath a ridge centered along the CO/NM border with weak cell motions of ~5 kt or less from northern NM into eastern UT and central CO. Wind speeds and shear increase across southeastern WY into eastern CO where greater capping currently exists, but a narrow region of greater instability and weaker inhibition was located along the Front Range into the Laramie Range where some stronger and slower moving cells were observed. Expectations are for continued thunderstorm development over the next couple of hours with slow and erratic movement around the ridge. In addition to slow movement, outflows and storm mergers will likely contribute to briefly enhanced rainfall rates with 15-30 minute totals in the 0.5 to 1.0 inch range. Given effective bulk shear of 25-30 kt from southeastern WY into portions of northeastern CO, better potential for cell organization will exist across these regions but so does forward speed especially with any congealing clusters of cells that should forward propagate, limiting rainfall duration. Isolated to scattered areas of flash flooding will remain a possibility, especially should there be overlap of slow moving cells with sensitive burn scars. Otto ...Please see www.wpc.ncep.noaa.gov for graphic product... ATTN...WFO...ABQ...BOU...CYS...GJT...PUB...RIW... ATTN...RFC...FWR...KRF...STR...TUA...NWC... LAT...LON 42720586 42610469 42130407 40790382 39080421 37920438 36880488 36260618 36390794 37350961 38730992 40330926 41900765