840 WOUS64 KWNS 181753 WOU1 SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 221 NWS STORM PREDICTION CENTER NORMAN OK 153 PM EDT MON MAY 18 2026 SEVERE THUNDERSTORM WATCH 221 REMAINS IN EFFECT UNTIL 800 PM EDT FOR THE FOLLOWING LOCATIONS MIC001-005-007-009-011-015-017-019-025-029-031-035-037-039-045- 047-049-051-055-057-063-065-067-069-073-075-077-079-081-085-087- 089-091-093-099-101-107-111-113-115-117-119-121-123-125-129-133- 135-137-139-141-143-145-147-151-155-157-159-161-163-165- 190000- /O.CON.KWNS.SV.A.0221.000000T0000Z-260519T0000Z/ MI . MICHIGAN COUNTIES INCLUDED ARE ALCONA ALLEGAN ALPENA ANTRIM ARENAC BARRY BAY BENZIE CALHOUN CHARLEVOIX CHEBOYGAN CLARE CLINTON CRAWFORD EATON EMMET GENESEE GLADWIN GRAND TRAVERSE GRATIOT HURON INGHAM IONIA IOSCO ISABELLA JACKSON KALAMAZOO KALKASKA KENT LAKE LAPEER LEELANAU LENAWEE LIVINGSTON MACOMB MANISTEE MECOSTA MIDLAND MISSAUKEE MONROE MONTCALM MONTMORENCY MUSKEGON NEWAYGO OAKLAND OGEMAW OSCEOLA OSCODA OTSEGO OTTAWA PRESQUE ISLE ROSCOMMON SAGINAW ST. CLAIR SANILAC SHIAWASSEE TUSCOLA VAN BUREN WASHTENAW WAYNE WEXFORD $$ LCZ422-423-460-LEZ444-LHZ347-348-349-361-362-363-421-422-441-442- 443-462-463-464-LMZ323-342-344-190000- /O.CON.KWNS.SV.A.0221.000000T0000Z-260519T0000Z/ CW . ADJACENT COASTAL WATERS INCLUDED ARE ST. CLAIR RIVER DETROIT RIVER LAKE ST. CLAIR OPEN LAKE (U.S. PORTION) MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE MI 5NM EAST OF MACKINAC BRIDGE TO PRESQUE ISLE LIGHT MI INCLUDING BOIS BLANC ISLAND PRESQUE ISLE LIGHT TO STURGEON PT MI INCLUDING THUNDER BAY NATIONAL MARINE SANCTUARY STURGEON PT TO ALABASTER MI LAKE HURON FROM 5NM EAST OF MACKINAC BRIDGE TO PRESQUE ISLE LT TO THE US/CANADIAN BORDER BEYOND 5 NM FROM SHORE LAKE HURON FROM PRESQUE ISLE LT. TO STURGEON POINT MI 5NM OFF SHORE TO US/CANADIAN BORDER LAKE HURON FROM STURGEON POINT TO ALABASTER MI 5NM OFF SHORE TO US/CANADIAN BORDER OUTER SAGINAW BAY SW OF ALABASTER TO PORT AUSTIN MI TO INNER SAGINAW BAY INNER SAGINAW BAY SW OF POINT AU GRES TO BAY PORT MI PORT AUSTIN TO HARBOR BEACH MI HARBOR BEACH TO PORT SANILAC MI PORT SANILAC TO PORT HURON MI LAKE HURON FROM PORT AUSTIN TO HARBOR BEACH 5NM OFF SHORE TO THE US/CANADIAN BORDER LAKE HURON FROM HARBOR BEACH TO PORT SANILAC 5NM OFF SHORE TO US/CANADIAN BORDER LAKE HURON FROM PORT SANILAC TO PORT HURON 5NM OFF SHORE TO US/CANADIAN BORDER GRAND TRAVERSE BAY SOUTH OF A LINE GRAND TRAVERSE LIGHT TO NORWOOD MI NORWOOD MI TO 5NM WEST OF MACKINAC BRIDGE INCLUDING LITTLE TRAVERSE BAY SLEEPING BEAR POINT TO GRAND TRAVERSE LIGHT MI $$ ATTN...WFO...APX...GRR...DTX...  841 WOUS64 KWNS 181753 WOU0 SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 220 NWS STORM PREDICTION CENTER NORMAN OK 153 PM EDT MON MAY 18 2026 SEVERE THUNDERSTORM WATCH 220 REMAINS IN EFFECT UNTIL 600 PM EDT FOR THE FOLLOWING LOCATIONS ILC023-025-033-035-049-079-101-159-182200- /O.CON.KWNS.SV.A.0220.000000T0000Z-260518T2200Z/ IL . ILLINOIS COUNTIES INCLUDED ARE CLARK CLAY CRAWFORD CUMBERLAND EFFINGHAM JASPER LAWRENCE RICHLAND $$ INC001-003-009-011-015-017-021-023-033-035-039-045-049-053-057- 059-063-065-067-069-075-081-085-087-091-095-097-099-103-107-109- 113-119-121-131-133-135-141-145-149-151-153-157-159-165-167-169- 171-179-181-183-182200- /O.CON.KWNS.SV.A.0220.000000T0000Z-260518T2200Z/ IN . INDIANA COUNTIES INCLUDED ARE ADAMS ALLEN BLACKFORD BOONE CARROLL CASS CLAY CLINTON DE KALB DELAWARE ELKHART FOUNTAIN FULTON GRANT HAMILTON HANCOCK HENDRICKS HENRY HOWARD HUNTINGTON JAY JOHNSON KOSCIUSKO LAGRANGE LA PORTE MADISON MARION MARSHALL MIAMI MONTGOMERY MORGAN NOBLE OWEN PARKE PULASKI PUTNAM RANDOLPH ST. JOSEPH SHELBY STARKE STEUBEN SULLIVAN TIPPECANOE TIPTON VERMILLION VIGO WABASH WARREN WELLS WHITE WHITLEY $$ MIC021-023-027-059-149-182200- /O.CON.KWNS.SV.A.0220.000000T0000Z-260518T2200Z/ MI . MICHIGAN COUNTIES INCLUDED ARE BERRIEN BRANCH CASS HILLSDALE ST. JOSEPH $$ OHC003-011-039-051-069-107-125-137-161-171-182200- /O.CON.KWNS.SV.A.0220.000000T0000Z-260518T2200Z/ OH . OHIO COUNTIES INCLUDED ARE ALLEN AUGLAIZE DEFIANCE FULTON HENRY MERCER PAULDING PUTNAM VAN WERT WILLIAMS $$ LMZ043-046-080-182200- /O.CON.KWNS.SV.A.0220.000000T0000Z-260518T2200Z/ CW . ADJACENT COASTAL WATERS INCLUDED ARE NEW BUFFALO MI TO ST JOSEPH MI MICHIGAN CITY IN TO NEW BUFFALO MI LAKE MICHIGAN MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM OFFSHORE TO MID-LINE OF LAKE. $$ ATTN...WFO...ILX...IWX...IND...ILN...