Land Management Forecasts
Issued by NWS San Francisco Bay Area, CA
Issued by NWS San Francisco Bay Area, CA
284 FNUS86 KMTR 272150 FWLMTR ECCDA Discussions National Weather Service SAN FRANCISCO BAY AREA 250 PM PDT Wed Aug 27 2025 ##################################################################### ## ## ## Discussions from the latest FWF below ## ## ## ##################################################################### ...Discussion from SFOFWFMTR... Moderate onshore flow with a 2,000-2,500 ft deep marine layer continue this afternoon. The marine layer will gradually compress from to around 1,000 feet by Friday. This will be accompanied by a subtle drying trend, with min RH dropping to 15-25% across interior mountains this weekend. Onshore winds will remain moderate and diurnally driven through the week. As monsoon moisture filters out, the chance for thunderstorms has dropped to zero. ...Discussion from SFOFWFEKA... The bulk of the monsoonal moisture pulls east on Wednesday. The ingredients for some isolated thunderstorms over northeast Trinity County will still exist, but the activity may mostly stay east of the county boundary. Westerly winds increase Wednesday afternoon with minimum RH lowering to the low 20s to upper teens. Minimum RH will continue to lower Thursday, down to the mid to low teens for the far interior. Southwesterly to southerly winds will also increase Thursday afternoon as a shortwave trough nears offshore to increase the fire weather threat, particularly in Lake County where locally critical conditions may develop in some isolated locations. Breezy westerly to southerly winds will likely develop Friday as the trough clips the region while passing north, but minimum RH will have begun generally trending higher and the amount of influence from the trough is still in question. ##################################################################### ## ## ## Complete a discussion for each ECCDA segment below ## ## When done click transmit, product sent as KMTRFWLMTR ## ## ## ##################################################################### ECC010-281000- St Helena ECC Dispatch- DISCUSSION FOR Marin and Sonoma and Napa Counties 250 PM PDT Wed Aug 27 2025 Moderate onshore flow with a 2,000-2,500 ft deep marine layer continue this afternoon. The marine layer will gradually compress from to around 1,000 feet by Friday. This will be accompanied by a subtle drying trend, with min RH dropping to 15-25% across interior mountains this weekend. Onshore winds will remain moderate and diurnally driven through the week. As monsoon moisture filters out, the chance for thunderstorms has dropped to zero. $$ ECC014-281000- Morgan Hill ECC Dispatch- DISCUSSION FOR Alameda and Contra Costa and Santa Clara Counties 250 PM PDT Wed Aug 27 2025 Moderate onshore flow with a 2,000-2,500 ft deep marine layer continue this afternoon. The marine layer will gradually compress from to around 1,000 feet by Friday. This will be accompanied by a subtle drying trend, with min RH dropping to 15-25% across interior mountains this weekend. Onshore winds will remain moderate and diurnally driven through the week. As monsoon moisture filters out, the chance for thunderstorms has dropped to zero. $$ ECC013-281000- Felton ECC Dispatch- DISCUSSION FOR Santa Cruz and San Mateo Counties 250 PM PDT Wed Aug 27 2025 Moderate onshore flow with a 2,000-2,500 ft deep marine layer continue this afternoon. The marine layer will gradually compress from to around 1,000 feet by Friday. This will be accompanied by a subtle drying trend, with min RH dropping to 15-25% across interior mountains this weekend. Onshore winds will remain moderate and diurnally driven through the week. As monsoon moisture filters out, the chance for thunderstorms has dropped to zero. $$ ECC018-281000- Monterey ECC Dispatch- DISCUSSION FOR Monterey and San Benito County 250 PM PDT Wed Aug 27 2025 Moderate onshore flow with a 2,000-2,500 ft deep marine layer continue this afternoon. The marine layer will gradually compress from to around 1,000 feet by Friday. This will be accompanied by a subtle drying trend, with min RH dropping to 15-25% across interior mountains this weekend. Onshore winds will remain moderate and diurnally driven through the week. As monsoon moisture filters out, the chance for thunderstorms has dropped to zero. $$