FNUS86 KMTR 092055 FWLMTR ECCDA Discussions National Weather Service SAN FRANCISCO BAY AREA 155 PM PDT Thu Jul 9 2026 ##################################################################### ## ## ## Discussions from the latest FWF below ## ## ## ##################################################################### ...Discussion from SFOFWFMTR... A warmer and drier airmass setting up across the region will persist through early next week. While we are not expecting extreme heat, fuels will continue to dry out. In addition, mid-to- upper level monsoonal moisture surge from the south brings the potential for high based thunderstorms Sunday and Monday. This is a low confidence, low probability but potentially high impact scenario if we see elevated convection develop over the Bay Area and Central Coast. Any elevated thunderstorms that do develop could lead to dry lightning and gusty, erratic outflow winds. Remain aware of the thunderstorm potential through the weekend into the beginning of next week. ...Discussion from SFOFWFEKA... Clear, dry, and hot weather will continue for interior valleys this afternoon through Friday. A large ridge of high pressure building over the region will push temperatures up into the mid to upper 90s. At the same time, humidity levels during the day will drop quite low into the teens and 20s. This dry air will quickly dry out the brush and grass in the forests, which increases the fire danger. Winds will stay mostly light and follow normal daily patterns, blowing gently up the mountain slopes in the afternoon. The immediate coast will be protected from this heat by a cool, damp layer of ocean clouds and fog, which will allow for excellent humidity recovery overnight. Looking ahead to next week, we are tracking a stronger heatwave inland, along with a small chance of moisture moving up from the south that could bring a risk of lightning to the northeastern mountains. ##################################################################### ## ## ## Complete a discussion for each ECCDA segment below ## ## When done click transmit, product sent as KMTRFWLMTR ## ## ## ##################################################################### ECC010-100900- St Helena ECC Dispatch- DISCUSSION FOR Marin and Sonoma and Napa Counties 155 PM PDT Thu Jul 9 2026 A warmer and drier airmass setting up across the region will persist through early next week. While we are not expecting extreme heat, fuels will continue to dry out. In addition, mid-to- upper level monsoonal moisture surge from the south brings the potential for high based thunderstorms Sunday and Monday. This is a low confidence, low probability but potentially high impact scenario if we see elevated convection develop over the Bay Area and Central Coast. Any elevated thunderstorms that do develop could lead to dry lightning and gusty, erratic outflow winds. Remain aware of the thunderstorm potential through the weekend into the beginning of next week. $$ ECC014-100900- Morgan Hill ECC Dispatch- DISCUSSION FOR Alameda and Contra Costa and Santa Clara Counties 155 PM PDT Thu Jul 9 2026 A warmer and drier airmass setting up across the region will persist through early next week. While we are not expecting extreme heat, fuels will continue to dry out. In addition, mid-to- upper level monsoonal moisture surge from the south brings the potential for high based thunderstorms Sunday and Monday. This is a low confidence, low probability but potentially high impact scenario if we see elevated convection develop over the Bay Area and Central Coast. Any elevated thunderstorms that do develop could lead to dry lightning and gusty, erratic outflow winds. Remain aware of the thunderstorm potential through the weekend into the beginning of next week. $$ ECC013-100900- Felton ECC Dispatch- DISCUSSION FOR Santa Cruz and San Mateo Counties 155 PM PDT Thu Jul 9 2026 A warmer and drier airmass setting up across the region will persist through early next week. While we are not expecting extreme heat, fuels will continue to dry out. In addition, mid-to- upper level monsoonal moisture surge from the south brings the potential for high based thunderstorms Sunday and Monday. This is a low confidence, low probability but potentially high impact scenario if we see elevated convection develop over the Bay Area and Central Coast. Any elevated thunderstorms that do develop could lead to dry lightning and gusty, erratic outflow winds. Remain aware of the thunderstorm potential through the weekend into the beginning of next week. $$ ECC018-100900- Monterey ECC Dispatch- DISCUSSION FOR Monterey and San Benito County 155 PM PDT Thu Jul 9 2026 A warmer and drier airmass setting up across the region will persist through early next week. While we are not expecting extreme heat, fuels will continue to dry out. In addition, mid-to- upper level monsoonal moisture surge from the south brings the potential for high based thunderstorms Sunday and Monday. This is a low confidence, low probability but potentially high impact scenario if we see elevated convection develop over the Bay Area and Central Coast. Any elevated thunderstorms that do develop could lead to dry lightning and gusty, erratic outflow winds. Remain aware of the thunderstorm potential through the weekend into the beginning of next week. $$