231 FNUS86 KMTR 222213 FWLMTR ECCDA Discussions National Weather Service SAN FRANCISCO BAY AREA 313 PM PDT Sat Aug 22 2026 ##################################################################### ## ## ## Discussions from the latest FWF below ## ## ## ##################################################################### ...Discussion from SFOFWFMTR... The far western periphery of a high pressure system centered over New Mexico continues to influence the Bay Area and north Central Coast. Additionally an upper level trough of low pressure continues over the eastern Pacific bringing onshore surface winds to the district. A northerly surface pressure gradient will slightly strengthen over the Sacramento Valley into the North Bay tonight and Sunday morning. This will result in surface to lower level winds shifting to a northeasterly direction before shifting back to onshore Sunday afternoon and evening. Because of this wind pattern and the current depth of the marine layer, expect poor humidity recoveries at higher elevations tonight and Sunday morning. Onshore winds fully return by late Sunday and Monday, however poor recoveries will continue at higher elevations above the marine layer through early and mid week. ...Discussion from SFOFWFEKA... A deep marine layer will continue to bring marine influence into the interior through the weekend. Interior high temperatures are forecast to be in the 80s to low 90s. Afternoon RH is forecast to be in the high teens to low 30s, with good overnight recoveries. Sunday into early next week, temperatures rise somewhat to near normal. Offshore flow overnight will bring poor overnight recoveries for higher elevations and lower afternoon RH across the area. A deeper marine layer returns mid next week. ##################################################################### ## ## ## Complete a discussion for each ECCDA segment below ## ## When done click transmit, product sent as KMTRFWLMTR ## ## ## ##################################################################### ECC010-231015- St Helena ECC Dispatch- DISCUSSION FOR Marin and Sonoma and Napa Counties 313 PM PDT Sat Aug 22 2026 The far western periphery of a high pressure system centered over New Mexico continues to influence the Bay Area and north Central Coast. Additionally an upper level trough of low pressure continues over the eastern Pacific bringing onshore surface winds to the district. A northerly surface pressure gradient will slightly strengthen over the Sacramento Valley into the North Bay tonight and Sunday morning. This will result in surface to lower level winds shifting to a northeasterly direction before shifting back to onshore Sunday afternoon and evening. Because of this wind pattern and the current depth of the marine layer, expect poor humidity recoveries at higher elevations tonight and Sunday morning. Onshore winds fully return by late Sunday and Monday, however poor recoveries will continue at higher elevations above the marine layer through early and mid week. $$ ECC014-231015- Morgan Hill ECC Dispatch- DISCUSSION FOR Alameda and Contra Costa and Santa Clara Counties 313 PM PDT Sat Aug 22 2026 The far western periphery of a high pressure system centered over New Mexico continues to influence the Bay Area and north Central Coast. Additionally an upper level trough of low pressure continues over the eastern Pacific bringing onshore surface winds to the district. A northerly surface pressure gradient will slightly strengthen over the Sacramento Valley into the North Bay tonight and Sunday morning. This will result in surface to lower level winds shifting to a northeasterly direction before shifting back to onshore Sunday afternoon and evening. Because of this wind pattern and the current depth of the marine layer, expect poor humidity recoveries at higher elevations tonight and Sunday morning. Onshore winds fully return by late Sunday and Monday, however poor recoveries will continue at higher elevations above the marine layer through early and mid week. $$ ECC013-231015- Felton ECC Dispatch- DISCUSSION FOR Santa Cruz and San Mateo Counties 313 PM PDT Sat Aug 22 2026 The far western periphery of a high pressure system centered over New Mexico continues to influence the Bay Area and north Central Coast. Additionally an upper level trough of low pressure continues over the eastern Pacific bringing onshore surface winds to the district. A northerly surface pressure gradient will slightly strengthen over the Sacramento Valley into the North Bay tonight and Sunday morning. This will result in surface to lower level winds shifting to a northeasterly direction before shifting back to onshore Sunday afternoon and evening. Because of this wind pattern and the current depth of the marine layer, expect poor humidity recoveries at higher elevations tonight and Sunday morning. Onshore winds fully return by late Sunday and Monday, however poor recoveries will continue at higher elevations above the marine layer through early and mid week. $$ ECC018-231015- Monterey ECC Dispatch- DISCUSSION FOR Monterey and San Benito County 313 PM PDT Sat Aug 22 2026 The far western periphery of a high pressure system centered over New Mexico continues to influence the Bay Area and north Central Coast. Additionally an upper level trough of low pressure continues over the eastern Pacific bringing onshore surface winds to the district. A northerly surface pressure gradient will slightly strengthen over the Sacramento Valley into the North Bay tonight and Sunday morning. This will result in surface to lower level winds shifting to a northeasterly direction before shifting back to onshore Sunday afternoon and evening. Because of this wind pattern and the current depth of the marine layer, expect poor humidity recoveries at higher elevations tonight and Sunday morning. Onshore winds fully return by late Sunday and Monday, however poor recoveries will continue at higher elevations above the marine layer through early and mid week. $$  198 FNUS86 KLOX 222231 FWLLOX ECCDA Discussions National Weather Service Los Angeles/Oxnard CA 331 PM PDT Sat Aug 22 2026 ECC029-231630- Los Padres National Forest- Discussion for Vandenberg ECC Dispatch 331 PM PDT Sat Aug 22 2026 ...Discussion from Monterey... The far western periphery of a high pressure system centered over New Mexico continues to influence the Bay Area and north Central Coast. Additionally an upper level trough of low pressure continues over the eastern Pacific bringing onshore surface winds to the district. A northerly surface pressure gradient will slightly strengthen over the Sacramento Valley into the North Bay tonight and Sunday morning. This will result in surface to lower level winds shifting to a northeasterly direction before shifting back to onshore Sunday afternoon and evening. Because of this wind pattern and the current depth of the marine layer, expect poor humidity recoveries at higher elevations tonight and Sunday morning. Onshore winds fully return by late Sunday and Monday, however poor recoveries will continue at higher elevations above the marine layer through early and mid week. Note : All winds are 20-foot Winds Unless otherwise specified. Thunderstorms imply strong, gusty and erratic winds. ...Discussion from Los Angeles/Oxnard... ...WIDESPREAD ELEVATED FIRE WEATHER CONDITIONS AWAY FROM THE IMMEDIATE COAST THROUGH NEXT WEEKEND WITH INCREASED RISK OF LARGE PLUME DOMINATED FIRES, PEAKING TUESDAY THROUGH THURSDAY DUE TO HOTTER TEMPERATURES AND DEEPER MIXING HEIGHTS... ...ELEVATED TO BRIEF CRITICAL FIRE WEATHER CONDITIONS ACROSS SOUTHERN SANTA BARBARA COUNTY DURING LATE AFTERNOON AND EVENING HOURS FROM TODAY THROUGH FRIDAY NIGHT DUE TO GUSTY SUNDOWNER WINDS WITH HOT AND DRY CONDITIONS... Hot and dry conditions will continue through Monday with temperatures between 95 and 106 degrees common over most valleys, mountains, and deserts. These temperatures will likely bump up slightly from Tuesday through at least Friday, especially across the valleys and interior coastal plain as weak offshore pressure trends are likely to develop. During the peak of the heat during this time frame, we can expected widespread temperatures 100 to 110 degrees across the valleys, lower mountains and deserts. This will likely translate into expansion of widespread elevated fire weather conditions over these areas. Minimum humidities will lower to between 10 and 25 percent each day away from the coast, driest next week. Meanwhile, mixing heights will likely range between 10,000 and 17,000 feet across the interior each afternoon, potentially climbing as high as 18,000 feet during the peak of the heat Tuesday through Friday. This will maintain the threat for large plume dominated fires. Gusty sundowner winds will likely affect southwest Santa Barbara County the next several evenings, potentially becoming slightly stronger/widespread with hotter/drier conditions by Tuesday and Wednesday evenings. This will likely bring critical fire weather conditions to Southern Santa Barbara county and possibly the I-5 corridor Tuesday evening into Friday night, with a 20-30 percent chance of Red Flag durations during this time. Also, there will likely be a slight influx of mid level moisture on Monday which could bring a 10-15 percent chance of thunderstorms across eastern San Gabriel mountains and eastern Antelope Valley, with isolated dry lightning strikes the main threat. $$ ECC028-231630- Santa Barbara County excluding Los Padres National Forest- Discussion for Santa Barbara ECC Dispatch 331 PM PDT Sat Aug 22 2026 ...WIDESPREAD ELEVATED FIRE WEATHER CONDITIONS AWAY FROM THE IMMEDIATE COAST THROUGH NEXT WEEKEND WITH INCREASED RISK OF LARGE PLUME DOMINATED FIRES, PEAKING TUESDAY THROUGH THURSDAY DUE TO HOTTER TEMPERATURES AND DEEPER MIXINGHEIGHTS... ...ELEVATED TO BRIEF CRITICAL FIRE WEATHER CONDITIONS ACROSS SOUTHERN SANTA BARBARA COUNTY DURING LATE AFTERNOON AND EVENING HOURS FROM TODAY THROUGH FRIDAY NIGHT DUE TO GUSTY SUNDOWNER WINDS WITH HOT AND DRY CONDITIONS... Hot and dry conditions will continue through Monday with temperatures between 95 and 106 degrees common over most valleys, mountains, and deserts. These temperatures will likely bump up slightly from Tuesday through at least Friday, especially across the valleys and interior coastal plain as weak offshore pressure trends are likely to develop. During the peak of the heat during this time frame, we can expected widespread temperatures 100 to 110 degrees across the valleys, lower mountains and deserts. This will likely translate into expansion of widespread elevated fire weather conditions over these areas. Minimum humidities will lower to between 10 and 25 percent each day away from the coast, driest next week. Meanwhile, mixing heights will likely range between 10,000 and 17,000 feet across the interior each afternoon, potentially climbing as high as 18,000 feet during the peak of the heat Tuesday through Friday. This will maintain the threat for large plume dominated fires. Gusty sundowner winds will likely affect southwest Santa Barbara County the next several evenings, potentially becoming slightly stronger/widespread with hotter/drier conditions by Tuesday and Wednesday evenings. This will likely bring critical fire weather conditions to Southern Santa Barbara county and possibly the I-5 corridor Tuesday evening into Friday night, with a 20-30 percent chance of Red Flag durations during this time. Also, there will likely be a slight influx of mid level moisture on Monday which could bring a 10-15 percent chance of thunderstorms across eastern San Gabriel mountains and eastern Antelope Valley, with isolated dry lightning strikes the main threat. $$ ECC031-231630- Angeles National Forest- Discussion for Lancaster ECC Dispatch 331 PM PDT Sat Aug 22 2026 ...WIDESPREAD ELEVATED FIRE WEATHER CONDITIONS AWAY FROM THE IMMEDIATE COAST THROUGH NEXT WEEKEND WITH INCREASED RISK OF LARGE PLUME DOMINATED FIRES, PEAKING TUESDAY THROUGH THURSDAY DUE TO HOTTER TEMPERATURES AND DEEPER MIXING HEIGHTS... ...ELEVATED TO BRIEF CRITICAL FIRE WEATHER CONDITIONS ACROSS SOUTHERN SANTA BARBARA COUNTY DURING LATE AFTERNOON AND EVENING HOURS FROM TODAY THROUGH FRIDAY NIGHT DUE TO GUSTY SUNDOWNER WINDS WITH HOT AND DRY CONDITIONS... Hot and dry conditions will continue through Monday with temperatures between 95 and 106 degrees common over most valleys, mountains, and deserts. These temperatures will likely bump up slightly from Tuesday through at least Friday, especially across the valleys and interior coastal plain as weak offshore pressure trends are likely to develop. During the peak of the heat during this time frame, we can expected widespread temperatures 100 to 110 degrees across the valleys, lower mountains and deserts. This will likely translate into expansion of widespread elevated fire weather conditions over these areas. Minimum humidities will lower to between 10 and 25 percent each day away from the coast, driest next week. Meanwhile, mixing heights will likely range between 10,000 and 17,000 feet across the interior each afternoon, potentially climbing as high as 18,000 feet during the peak of the heat Tuesday through Friday. This will maintain the threat for large plume dominated fires. Gusty sundowner winds will likely affect southwest Santa Barbara County the next several evenings, potentially becoming slightly stronger/widespread with hotter/drier conditions by Tuesday and Wednesday evenings. This will likely bring critical fire weather conditions to Southern Santa Barbara county and possibly the I-5 corridor Tuesday evening into Friday night, with a 20-30 percent chance of Red Flag durations during this time. Also, there will likely be a slight influx of mid level moisture on Monday which could bring a 10-15 percent chance of thunderstorms across eastern San Gabriel mountains and eastern Antelope Valley, with isolated dry lightning strikes the main threat. $$ ECC024-231630- San Luis Obispo County- Discussion for San Luis Obispo ECC Dispatch 331 PM PDT Sat Aug 22 2026 ...WIDESPREAD ELEVATED FIRE WEATHER CONDITIONS AWAY FROM THE IMMEDIATE COAST THROUGH NEXT WEEKEND WITH INCREASED RISK OF LARGE PLUME DOMINATED FIRES, PEAKING TUESDAY THROUGH THURSDAY DUE TO HOTTER TEMPERATURES AND DEEPER MIXING HEIGHTS... ...ELEVATED TO BRIEF CRITICAL FIRE WEATHER CONDITIONS ACROSS SOUTHERN SANTA BARBARA COUNTY DURING LATE AFTERNOON AND EVENING HOURS FROM TODAY THROUGH FRIDAY NIGHT DUE TO GUSTY SUNDOWNER WINDS WITH HOT AND DRY CONDITIONS... Hot and dry conditions will continue through Monday with temperatures between 95 and 106 degrees common over most valleys, mountains, and deserts. These temperatures will likely bump up slightly from Tuesday through at least Friday, especially across the valleys and interior coastal plain as weak offshore pressure trends are likely to develop. During the peak of the heat during this time frame, we can expected widespread temperatures 100 to 110 degrees across the valleys, lower mountains and deserts. This will likely translate into expansion of widespread elevated fire weather conditions over these areas. Minimum humidities will lower to between 10 and 25 percent each day away from the coast, driest next week. Meanwhile, mixing heights will likely range between 10,000 and 17,000 feet across the interior each afternoon, potentially climbing as high as 18,000 feet during the peak of the heat Tuesday through Friday. This will maintain the threat for large plume dominated fires. Gusty sundowner winds will likely affect southwest Santa Barbara County the next several evenings, potentially becoming slightly stronger/widespread with hotter/drier conditions by Tuesday and Wednesday evenings. This will likely bring critical fire weather conditions to Southern Santa Barbara county and possibly the I-5 corridor Tuesday evening into Friday night, with a 20-30 percent chance of Red Flag durations during this time. Also, there will likely be a slight influx of mid level moisture on Monday which could bring a 10-15 percent chance of thunderstorms across eastern San Gabriel mountains and eastern Antelope Valley, with isolated dry lightning strikes the main threat. $$ ECC032-231630- Ventura County excluding Los Padres National Forest- Discussion for Ventura ECC Dispatch 331 PM PDT Sat Aug 22 2026 ...WIDESPREAD ELEVATED FIRE WEATHER CONDITIONS AWAY FROM THE IMMEDIATE COAST THROUGH NEXT WEEKEND WITH INCREASED RISK OF LARGE PLUME DOMINATED FIRES, PEAKING TUESDAY THROUGH THURSDAY DUE TO HOTTER TEMPERATURES AND DEEPER MIXING HEIGHTS... ...ELEVATED TO BRIEF CRITICAL FIRE WEATHER CONDITIONS ACROSS SOUTHERN SANTA BARBARA COUNTY DURING LATE AFTERNOON AND EVENING HOURS FROM TODAY THROUGH FRIDAY NIGHT DUE TO GUSTY SUNDOWNER WINDS WITH HOT AND DRY CONDITIONS... Hot and dry conditions will continue through Monday with temperatures between 95 and 106 degrees common over most valleys, mountains, and deserts. These temperatures will likely bump up slightly from Tuesday through at least Friday, especially across the valleys and interior coastal plain as weak offshore pressure trends are likely to develop. During the peak of the heat during this time frame, we can expected widespread temperatures 100 to 110 degrees across the valleys, lower mountains and deserts. This will likely translate into expansion of widespread elevated fire weather conditions over these areas. Minimum humidities will lower tobetween 10 and 25 percent each day away from the coast, driest next week. Meanwhile, mixing heights will likely range between 10,000 and 17,000 feet across the interior each afternoon, potentially climbing as high as 18,000 feet during the peak of the heat Tuesday through Friday. This will maintain the threat for large plume dominated fires. Gusty sundowner winds will likely affect southwest Santa Barbara County the next several evenings, potentially becoming slightly stronger/widespread with hotter/drier conditions by Tuesday and Wednesday evenings. This will likely bring critical fire weather conditions to Southern Santa Barbara county and possibly the I-5 corridor Tuesday evening into Friday night, with a 20-30 percent chance of Red Flag durations during this time. Also, there will likely be a slight influx of mid level moisture on Monday which could bring a 10-15 percent chance of thunderstorms across eastern San Gabriel mountains and eastern Antelope Valley, with isolated dry lightning strikes the main threat. $$ ECC030-231630- Los Angeles County excluding Angeles National Forest- Discussion for Los Angeles ECC Dispatch 331 PM PDT Sat Aug 22 2026 ...WIDESPREAD ELEVATED FIRE WEATHER CONDITIONS AWAY FROM THE IMMEDIATE COAST THROUGH NEXT WEEKEND WITH INCREASED RISK OF LARGE PLUME DOMINATED FIRES, PEAKING TUESDAY THROUGH THURSDAY DUE TO HOTTER TEMPERATURES AND DEEPER MIXING HEIGHTS... ...ELEVATED TO BRIEF CRITICAL FIRE WEATHER CONDITIONS ACROSS SOUTHERN SANTA BARBARA COUNTY DURING LATE AFTERNOON AND EVENING HOURS FROM TODAY THROUGH FRIDAY NIGHT DUE TO GUSTY SUNDOWNER WINDS WITH HOT AND DRY CONDITIONS... Hot and dry conditions will continue through Monday with temperatures between 95 and 106 degrees common over most valleys, mountains, and deserts. These temperatures will likely bump up slightly from Tuesday through at least Friday, especially across the valleys and interior coastal plain as weak offshore pressure trends are likely to develop. During the peak of the heat during this time frame, we can expected widespread temperatures 100 to 110 degrees across the valleys, lower mountains and deserts. This will likely translate into expansion of widespread elevated fire weather conditions over these areas. Minimum humidities will lower to between 10 and 25 percent each day away from the coast, driest next week. Meanwhile, mixing heights will likely range between 10,000 and 17,000 feet across the interior each afternoon, potentially climbing as high as 18,000 feet during the peak of the heat Tuesday through Friday. This will maintain the threat for large plume dominated fires. Gusty sundowner winds will likely affect southwest Santa Barbara County the next several evenings, potentially becoming slightly stronger/widespread with hotter/drier conditions by Tuesday and Wednesday evenings. This will likely bring critical fire weather conditions to Southern Santa Barbara county and possibly the I-5 corridor Tuesday evening into Friday night, with a 20-30 percent chance of Red Flag durations during this time. Also, there will likely be a slight influx of mid level moisture on Monday which could bring a 10-15 percent chance of thunderstorms across eastern San Gabriel mountains and eastern Antelope Valley, with isolated dry lightning strikes the main threat. $$