278 FNUS85 KVEF 232105 FWLVEF ECCDA DISCUSSIONS NATIONAL WEATHER SERVICE LAS VEGAS NV 205 PM PDT SUN AUG 23 2026 ##################################################################### ## ## ## DISCUSSIONS FROM THE LATEST FWF BELOW ## ## ## ##################################################################### ...DISCUSSION FROM RNOFWFVEF... EXPECT ISOLATED SHOWERS AND THUNDERSTORMS ACROSS THE HIGHER TERRAIN OF SOUTHERN NEVADA AND NORTHWESTERN ARIZONA THIS AFTERNOON, WITH STORMS DISSIPATING AFTER SUNSET. ANOTHER ROUND OF AFTERNOON SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE FOR AREAS SOUTH AND EAST OF THE I-15 CORRIDOR ON MONDAY. ABOVE NORMAL TEMPERATURES WILL CONTINUE ACROSS THE REGION THROUGH THE END OF THE WEEK. AFTERNOON RELATIVE HUMIDITIES WILL BOTTOM OUT IN THE SINGLE DIGITS TO UPPER- TEENS THIS AFTERNOON. AREAS SOUTH AND EAST OF I-15 WILL SEE AN UPTICK IN MOISTURE TOMORROW, BRINGING MINIMUM RH VALUES INTO THE 15 TO 25% RANGE. BEYOND MONDAY, MOISTURE WILL DECREASE ACROSS THE REGION AS WE FIND OURSELVES UNDER DRY SOUTHWESTERLY FLOW ALOFT. ...DISCUSSION FROM LAXFWFSGX... MONSOONAL MOISTURE RETURNS EARLY THIS WEEK, YIELDING CHANCES (20-35%) FOR SHOWERS/THUNDERSTORMS FOR THE MOUNTAINS MONDAY AFTERNOON AND A SLIGHT CHANCE (10-20%) FOR SHOWERS/THUNDERSTORMS TUESDAY AFTERNOON. ABOVE AVERAGE HIGH AND LOW TEMPERATURES WILL CONTINUE THROUGH THE WEEK, GENERALLY 5 TO 10 DEGREES ABOVE AVERAGE FOR INLAND AREAS AND LOW DESERTS. ...DISCUSSION FROM PHXFWFPSR... HOT AND SEASONALLY DRY CONDITIONS WILL PREVAIL THROUGH THE START OF THE WEEK. STRONG GUSTY WINDS AND THUNDERSTORMS WILL BE POSSIBLE (20-30% CHANCE) LATE THIS AFTERNOON AND THROUGH THIS EVENING, MOSTLY ACROSS SOUTH-CENTRAL AZ, WHILE CHANCES FOR WETTING RAINS WILL BE AROUND 15-30%. MINIMUM RHS WILL IMPROVE THROUGH MONDAY WITH READINGS OF 15-25% TODAY AND 20-30% MONDAY, BEFORE DROPPING BACK INTO THE TEENS AS EARLY AS TUESDAY. TEMPERATURES WILL BE AROUND 5-10 DEGREES ABOVE NORMAL, WITH LOWER DESERT HIGHS ECLIPSING 110 DEGREES NEARLY EVERY AFTERNOON. OUTSIDE OF THUNDERSTORM OUTFLOW WINDS, WINDS WILL FOLLOW THE TYPICAL DIURNAL TENDENCIES WITH SOME MODEST AFTERNOON UPSLOPE GUSTINESS. ##################################################################### ## ## ## AFTER REVIEWING THE FWF DISCUSSIONS (ABOVE) - COMPLETE ## ## THE DISCUSSION (BELOW) FOR THE ECCDA FORECAST ## ## WHEN DONE CLICK TRANSMIT, PRODUCT SENT AS KVEFFWLVEF ## ## ## ##################################################################### ECC027-241515- SAN BERNARDINO ECC DISPATCH- DISCUSSION FOR SAN BERNARDINO ECC DISPATCH 205 PM PDT SUN AUG 23 2026 EXPECT ISOLATED SHOWERS AND THUNDERSTORMS ACROSS THE HIGHER TERRAIN OF SOUTHERN NEVADA AND NORTHWESTERN ARIZONA THIS AFTERNOON, WITH STORMS DISSIPATING AFTER SUNSET. ANOTHER ROUND OF AFTERNOON SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE FOR AREAS SOUTH AND EAST OF THE I-15 CORRIDOR ON MONDAY. ABOVE NORMAL TEMPERATURES WILL CONTINUE ACROSS THE REGION THROUGH THE END OF THE WEEK. AFTERNOON RELATIVE HUMIDITIES WILL BOTTOM OUT IN THE SINGLE DIGITS TO UPPER- TEENS THIS AFTERNOON. AREAS SOUTH AND EAST OF I-15 WILL SEE AN UPTICK IN MOISTURE TOMORROW, BRINGING MINIMUM RH VALUES INTO THE 15 TO 25% RANGE. BEYOND MONDAY, MOISTURE WILL DECREASE ACROSS THE REGION AS WE FIND OURSELVES UNDER DRY SOUTHWESTERLY FLOW ALOFT. $$  335 FNUS86 KSTO 232121 FWLSTO ECCDA DISCUSSIONS FOR CALIFORNIA NATIONAL WEATHER SERVICE SACRAMENTO CA 221 PM PDT SUN AUG 23 2026 ECC005-241530- SHASTA-TRINITY NATIONAL FOREST- DISCUSSION FOR REDDING ECC DISPATCH 221 PM PDT SUN AUG 23 2026 ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM PDT MONDAY FOR STRONG GUSTY WIND AND LOW RH FOR FIRE WEATHER ZONES 280, 281, 621, 622, AND 623... ...BREEZY SOUTH TO WEST WINDS AND LOW HUMIDITY IN THE NORTHEAST FOOTHILLS MONDAY AFTERNOON AND EVENING.. DRY CONDITIONS AND VERY LOW HUMIDITY CONTINUE TODAY WITH LESS WIND THAN YESTERDAY. THUNDERSTORM CHANCES AROUND 10% EAST OF THE SIERRA CREST, INCLUDING PORTIONS OF THE BURNEY BASIN, THROUGH MONDAY. NON-ZERO BUT HIGHLY UNCERTAIN CHANCE FOR AN ISOLATED THUNDERSTORM MOVING FROM THE NORTH BAY INTO THE SACRAMENTO VALLEY MONDAY MORNING AS WELL. SEASONABLY WARM AND DRY CONDITIONS PREVAIL OVER THE COMING DAYS. PERIODS OF BREEZY ONSHORE WINDS AND LOW HUMIDITY THIS WEEK BRINGS ELEVATED FIRE WEATHER CONDITIONS IN THE NORTHERN SACRAMENTO VALLEY AND NORTHEAST FOOTHILLS WITH WORST CONDITIONS IN THE NORTHEAST FOOTHILLS ON MONDAY. $$ ECC007-241530- MENDOCINO NATIONAL FOREST, SOUTHERN SACRAMENTO VALLEY, AND DELTA- DISCUSSION FOR WILLOWS ECC DISPATCH 221 PM PDT SUN AUG 23 2026 ...BREEZY SOUTH TO WEST WINDS AND LOW HUMIDITY IN THE NORTHEAST FOOTHILLS MONDAY AFTERNOON AND EVENING.. DRY CONDITIONS AND VERY LOW HUMIDITY CONTINUE TODAY WITH LESS WIND THAN YESTERDAY. NON-ZERO BUT HIGHLY UNCERTAIN CHANCE FOR AN ISOLATED THUNDERSTORM MOVING FROM THE NORTH BAY INTO THE SACRAMENTO VALLEY MONDAY MORNING AS WELL. SEASONABLY WARM AND DRY CONDITIONS PREVAIL OVER THE COMING DAYS. PERIODS OF BREEZY ONSHORE WINDS AND LOW HUMIDITY THIS WEEK BRINGS ELEVATED FIRE WEATHER CONDITIONS IN THE NORTHERN SACRAMENTO VALLEY AND NORTHEAST FOOTHILLS WITH WORST CONDITIONS IN THE NORTHEAST FOOTHILLS ON MONDAY. $$ ECC008-241530- RED BLUFF AND OROVILLE- DISCUSSION FOR RED BLUFF AND OROVILLE ECC DISPATCH 221 PM PDT SUN AUG 23 2026 ...BREEZY SOUTH TO WEST WINDS AND LOW HUMIDITY IN THE NORTHEAST FOOTHILLS MONDAY AFTERNOON AND EVENING.. DRY CONDITIONS AND VERY LOW HUMIDITY CONTINUE TODAY WITH LESS WIND THAN YESTERDAY. THUNDERSTORM CHANCES AROUND 10% EAST OF THE SIERRA CREST. SEASONABLY WARM AND DRY CONDITIONS PREVAIL OVER THE COMING DAYS. PERIODS OF BREEZY ONSHORE WINDS AND LOW HUMIDITY THIS WEEK BRINGS ELEVATED FIRE WEATHER CONDITIONS IN THE NORTHERN SACRAMENTO VALLEY AND NORTHEAST FOOTHILLS WITH WORST CONDITIONS IN THE NORTHEAST FOOTHILLS ON MONDAY. $$ ECC011-241530- TAHOE NATIONAL FOREST- DISCUSSION FOR GRASS VALLEY ECC DISPATCH 221 PM PDT SUN AUG 23 2026 DRY CONDITIONS AND VERY LOW HUMIDITY CONTINUE TODAY WITH LESS WIND THAN YESTERDAY. THUNDERSTORM AND SHOWER CHANCES AROUND 10% EAST OF THE SIERRA CREST, INCLUDING PORTIONS OF THE BURNEY BASIN, THROUGH MONDAY. SEASONABLY WARM AND DRY CONDITIONS PREVAIL OVER THE COMING DAYS WITH TYPICAL SOUTHWESTERLY GUSTS IN THE AFTERNOON OF UP TO 25-35 MPH OVER THE MOUNTAIN AND 15-25 MPH ACROSS LOWER ELEVATIONS. $$ ECC015-241530- STANISLAUS NATIONAL FOREST- DISCUSSION FOR SAN ANDREAS ECC DISPATCH 221 PM PDT SUN AUG 23 2026 DRY CONDITIONS AND VERY LOW HUMIDITY CONTINUE TODAY WITH LESS WIND THAN YESTERDAY. THUNDERSTORM AND SHOWER CHANCES AROUND 10% EAST OF THE SIERRA CREST, INCLUDING PORTIONS OF THE BURNEY BASIN, THROUGH MONDAY. SEASONABLY WARM AND DRY CONDITIONS PREVAIL OVER THE COMING DAYS WITH TYPICAL SOUTHWESTERLY GUSTS IN THE AFTERNOON OF UP TO 25-35 MPH OVER THE MOUNTAIN AND 15-25 MPH ACROSS LOWER ELEVATIONS. $$  731 FNUS85 KREV 232142 FWLREV ECCDA Discussions National Weather Service Reno NV 242 PM PDT Sun Aug 23 2026 ECC004-009-242145- Lassen NF and BLM in Modoc, Lassen, and Washoe Counties-Plumas NF- Discussion for Susanville and Quincy 242 PM PDT Sun Aug 23 2026 Seasonably warm and breezy conditions prevail for the upcoming week. Monday could see low chances (10-20%) for showers and isolated thunderstorms mainly across the eastern district. Otherwise expect typical westerly winds in the afternoon with gusts of 20-25 mph through Tuesday. Gusty conditions with elevated to critical fire weather concerns are possible after midweek. $$ ECC012-242145- Tahoe Basin, Sierra Foothills and El Dorado NF- Discussion for Camino 242 PM PDT Sun Aug 23 2026 Seasonably warm, dry, and breezy conditions prevail for the upcoming week with only low chances, less than 10%, for an isolated shower or thunderstorm along the eastern Sierra on Monday. Otherwise typical afternoon breezes are expected through Tuesday with increasing gusts possible after mid-week. $$ ECC016-017-242145- Sierra Front in Alpine county- Inyo NF, Mono County and Owens Valley- Discussion for SF and Inyo 242 PM PDT Sun Aug 23 2026 Seasonably warm, dry, and breezy conditions prevail for the upcoming week. Otherwise typical afternoon breezes are expected through Tuesday with increasing gusts an elevated fire weather conditions possible after mid-week. $$  737 FNUS86 KMTR 232142 FWLMTR ECCDA Discussions National Weather Service SAN FRANCISCO BAY AREA 242 PM PDT Sun Aug 23 2026 ##################################################################### ## ## ## Discussions from the latest FWF below ## ## ## ##################################################################### ...Discussion from SFOFWFMTR... The marine layer remains compressed to around 1000 feet with fluctuations between 1000 to 1200 feet expected this week. There is a low (5%) chance of storms developing across northern Napa County early Monday morning due to the arrival of a weak shortwave trough. Confidence that storms will develop is low and any convective potential decreases by Monday afternoon. Coastal drizzle and patchy fog are likely directly along the coastline through the week. Slightly above normal temperatures and very dry conditions continue above the marine layer with poor daytime humidity values between 10-20%. Little to no humidity recovery is expected at the higher elevations with overnight RH values peaking between 20-30%. Diurnally breezy winds continue across favored locations through the upcoming week. ...Discussion from SFOFWFEKA... High pressure rebuilds with warmer temperatures in the 90s and lower RHs in the teens and 20s. Overnight recoveries will be moderate to good in the lower elevations and poor in the higher elevations. Winds generally remain light and terrain driven with typical afternoon breezes. A deeper marine layer returns mid next week. ##################################################################### ## ## ## Complete a discussion for each ECCDA segment below ## ## When done click transmit, product sent as KMTRFWLMTR ## ## ## ##################################################################### ECC010-240945- St Helena ECC Dispatch- DISCUSSION FOR Marin and Sonoma and Napa Counties 242 PM PDT Sun Aug 23 2026 The marine layer remains compressed to around 1000 feet with fluctuations between 1000 to 1200 feet expected this week. There is a low (5%) chance of storms developing across northern Napa County early Monday morning due to the arrival of a weak shortwave trough. Confidence that storms will develop is low and any convective potential decreases by Monday afternoon. Coastal drizzle and patchy fog are likely directly along the coastline through the week. Slightly above normal temperatures and very dry conditions continue above the marine layer with poor daytime humidity values between 10-20%. Little to no humidity recovery is expected at the higher elevations with overnight RH values peaking between 20-30%. Diurnally breezy winds continue across favored locations through the upcoming week. $$ ECC014-240945- Morgan Hill ECC Dispatch- DISCUSSION FOR Alameda and Contra Costa and Santa Clara Counties 242 PM PDT Sun Aug 23 2026 The marine layer remains compressed to around 1000 feet with fluctuations between 1000 to 1200 feet expected this week. There is a low (5%) chance of storms developing across northern Napa County early Monday morning due to the arrival of a weak shortwave trough. Confidence that storms will develop is low and any convective potential decreases by Monday afternoon. Coastal drizzle and patchy fog are likely directly along the coastline through the week. Slightly above normal temperatures and very dry conditions continue above the marine layer with poor daytime humidity values between 10-20%. Little to no humidity recovery is expected at the higher elevations with overnight RH values peaking between 20-30%. Diurnally breezy winds continue across favored locations through the upcoming week. $$ ECC013-240945- Felton ECC Dispatch- DISCUSSION FOR Santa Cruz and San Mateo Counties 242 PM PDT Sun Aug 23 2026 The marine layer remains compressed to around 1000 feet with fluctuations between 1000 to 1200 feet expected this week. There is a low (5%) chance of storms developing across northern Napa County early Monday morning due to the arrival of a weak shortwave trough. Confidence that storms will develop is low and any convective potential decreases by Monday afternoon. Coastal drizzle and patchy fog are likely directly along the coastline through the week. Slightly above normal temperatures and very dry conditions continue above the marine layer with poor daytime humidity values between 10-20%. Little to no humidity recovery is expected at the higher elevations with overnight RH values peaking between 20-30%. Diurnally breezy winds continue across favored locations through the upcoming week. $$ ECC018-240945- Monterey ECC Dispatch- DISCUSSION FOR Monterey and San Benito County 242 PM PDT Sun Aug 23 2026 The marine layer remains compressed to around 1000 feet with fluctuations between 1000 to 1200 feet expected this week. There is a low (5%) chance of storms developing across northern Napa County early Monday morning due to the arrival of a weak shortwave trough. Confidence that storms will develop is low and any convective potential decreases by Monday afternoon. Coastal drizzle and patchy fog are likely directly along the coastline through the week. Slightly above normal temperatures and very dry conditions continue above the marine layer with poor daytime humidity values between 10-20%. Little to no humidity recovery is expected at the higher elevations with overnight RH values peaking between 20-30%. Diurnally breezy winds continue across favored locations through the upcoming week. $$  173 FNUS86 KHNX 232152 FWLHNX ECCDA DISCUSSIONS NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA 252 PM PDT SUN AUG 23 2026 ECC019-241600- MARIPOSA- DISCUSSION FOR MARIPOSA ECC DISPATCH 252 PM PDT SUN AUG 23 2026 HOT, BUT NOT EXTREME, SUMMER WEATHER CONTINUES WITH FURTHER WARMING EXPECTED EARLY IN THE WEEK. MINIMUM RELATIVE HUMIDITY AROUND 20% IN THE SAN JOAQUIN VALLEY, 10% IN THE MOJAVE DESERT, AND 25-30% IN THE SIERRA NEVADA. MODERATE TO GOOD OVERNIGHT RECOVERY CONTINUES OVER A MAJORITY OF THE DISTRICT. WINDS EXPECTED TO REMAIN LIGHT OUTSIDE THE TYPICAL GUSTY AREAS. PROBABILITY OF THUNDERSTORMS IN THE SIERRA NEVADA BELOW 10% THIS AFTERNOON AND THROUGH THE REMAINDER OF THIS WEEK. $$ ECC021-241600- FRESNO- DISCUSSION FOR FRESNO ECC DISPATCH 252 PM PDT SUN AUG 23 2026 HOT, BUT NOT EXTREME, SUMMER WEATHER CONTINUES WITH FURTHER WARMING EXPECTED EARLY IN THE WEEK. MINIMUM RELATIVE HUMIDITY AROUND 20% IN THE SAN JOAQUIN VALLEY, 10% IN THE MOJAVE DESERT, AND 25-30% IN THE SIERRA NEVADA. MODERATE TO GOOD OVERNIGHT RECOVERY CONTINUES OVER A MAJORITY OF THE DISTRICT. WINDS EXPECTED TO REMAIN LIGHT OUTSIDE THE TYPICAL GUSTY AREAS. PROBABILITY OF THUNDERSTORMS IN THE SIERRA NEVADA BELOW 10% THIS AFTERNOON AND THROUGH THE REMAINDER OF THIS WEEK. $$ ECC023-241600- VISALIA- DISCUSSION FOR VISALIA ECC DISPATCH 252 PM PDT SUN AUG 23 2026 HOT, BUT NOT EXTREME, SUMMER WEATHER CONTINUES WITH FURTHER WARMING EXPECTED EARLY IN THE WEEK. MINIMUM RELATIVE HUMIDITY AROUND 20% IN THE SAN JOAQUIN VALLEY, 10% IN THE MOJAVE DESERT, AND 25-30% IN THE SIERRA NEVADA. MODERATE TO GOOD OVERNIGHT RECOVERY CONTINUES OVER A MAJORITY OF THE DISTRICT. WINDS EXPECTED TO REMAIN LIGHT OUTSIDE THE TYPICAL GUSTY AREAS. PROBABILITY OF THUNDERSTORMS IN THE SIERRA NEVADA BELOW 10% THIS AFTERNOON AND THROUGH THE REMAINDER OF THIS WEEK. $$ ECC025-241600- BAKERSFIELD- DISCUSSION FOR BAKERSFIELD ECC DISPATCH 252 PM PDT SUN AUG 23 2026 HOT, BUT NOT EXTREME, SUMMER WEATHER CONTINUES WITH FURTHER WARMING EXPECTED EARLY IN THE WEEK. MINIMUM RELATIVE HUMIDITY AROUND 20% IN THE SAN JOAQUIN VALLEY, 10% IN THE MOJAVE DESERT, AND 25-30% IN THE SIERRA NEVADA. MODERATE TO GOOD OVERNIGHT RECOVERY CONTINUES OVER A MAJORITY OF THE DISTRICT. WINDS EXPECTED TO REMAIN LIGHT OUTSIDE THE TYPICAL GUSTY AREAS. PROBABILITY OF THUNDERSTORMS IN THE SIERRA NEVADA BELOW 10% THIS AFTERNOON AND THROUGH THE REMAINDER OF THIS WEEK. $$ ECC020-241600- YOSEMITE- DISCUSSION FOR YOSEMITE ECC DISPATCH 252 PM PDT SUN AUG 23 2026 HOT, BUT NOT EXTREME, SUMMER WEATHER CONTINUES WITH FURTHER WARMING EXPECTED EARLY IN THE WEEK. MINIMUM RELATIVE HUMIDITY AROUND 20% IN THE SAN JOAQUIN VALLEY, 10% IN THE MOJAVE DESERT, AND 25-30% IN THE SIERRA NEVADA. MODERATE TO GOOD OVERNIGHT RECOVERY CONTINUES OVER A MAJORITY OF THE DISTRICT. WINDS EXPECTED TO REMAIN LIGHT OUTSIDE THE TYPICAL GUSTY AREAS. PROBABILITY OF THUNDERSTORMS IN THE SIERRA NEVADA BELOW 10% THIS AFTERNOON AND THROUGH THE REMAINDER OF THIS WEEK. $$ ECC022-241600- ASH MOUNTAIN- DISCUSSION FOR ASH MOUNTAIN ECC DISPATCH 252 PM PDT SUN AUG 23 2026 HOT, BUT NOT EXTREME, SUMMER WEATHER CONTINUES WITH FURTHER WARMING EXPECTED EARLY IN THE WEEK. MINIMUM RELATIVE HUMIDITY AROUND 20% IN THE SAN JOAQUIN VALLEY, 10% IN THE MOJAVE DESERT, AND 25-30% IN THE SIERRA NEVADA. MODERATE TO GOOD OVERNIGHT RECOVERY CONTINUES OVER A MAJORITY OF THE DISTRICT. WINDS EXPECTED TO REMAIN LIGHT OUTSIDE THE TYPICAL GUSTY AREAS. PROBABILITY OF THUNDERSTORMS IN THE SIERRA NEVADA BELOW 10% THIS AFTERNOON AND THROUGH THE REMAINDER OF THIS WEEK. $$ ECC026-241600- PORTERVILLE- DISCUSSION FOR PORTERVILLE ECC DISPATCH 252 PM PDT SUN AUG 23 2026 HOT, BUT NOT EXTREME, SUMMER WEATHER CONTINUES WITH FURTHER WARMING EXPECTED EARLY IN THE WEEK. MINIMUM RELATIVE HUMIDITY AROUND 20% IN THE SAN JOAQUIN VALLEY, 10% IN THE MOJAVE DESERT, AND 25-30% IN THE SIERRA NEVADA. MODERATE TO GOOD OVERNIGHT RECOVERY CONTINUES OVER A MAJORITY OF THE DISTRICT. WINDS EXPECTED TO REMAIN LIGHT OUTSIDE THE TYPICAL GUSTY AREAS. PROBABILITY OF THUNDERSTORMS IN THE SIERRA NEVADA BELOW 10% THIS AFTERNOON AND THROUGH THE REMAINDER OF THIS WEEK. $$