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. $$ ECC018-231015- Monterey ECC Dispatch- DISCUSSION FOR Monterey and San Benito County 313 PM PDT Sat Aug 22 2026 The far western periphery of a high pressure system centered over New Mexico continues to influence the Bay Area and north Central Coast. Additionally an upper level trough of low pressure continues over the eastern Pacific bringing onshore surface winds to the district. A northerly surface pressure gradient will slightly strengthen over the Sacramento Valley into the North Bay tonight and Sunday morning. This will result in surface to lower level winds shifting to a northeasterly direction before shifting back to onshore Sunday afternoon and evening. Because of this wind pattern and the current depth of the marine layer, expect poor humidity recoveries at higher elevations tonight and Sunday morning. Onshore winds fully return by late Sunday and Monday, however poor recoveries will continue at higher elevations above the marine layer through early and mid week. $$