####018007877#### FNUS86 KMTR 022217 FWLMTR ECCDA Discussions National Weather Service SAN FRANCISCO BAY AREA 317 PM PDT Fri May 2 2025 ##################################################################### ## ## ## Discussions from the latest FWF below ## ## ## ##################################################################### ...Discussion from SFOFWFMTR... Onshore winds are expected to strengthen Friday evening into the overnight hours. Strong northwest winds between 40 to 50 mph will develop along the coast early Saturday morning and persist through early Sunday morning with gusts between 30 to 40 mph across the interior. A Wind Advisory is in effect for portions of the coastline from 11 AM Saturday to 5 AM Sunday. More significant for fire weather concerns, strong offshore winds will develop across the North Bay Interior Mountains and East Bay Hills late Sunday into Monday. These winds will gust between 35 to 45 mph with the strongest gusts across northern Sonoma and Napa counties. Daytime and overnight RH values will drop into the 30-40% range across much of Napa, northern Sonoma, and the East Bay Hills. Offshore winds will peak during Monday morning before diminishing by late Monday evening. ERC values are forecast to remain near average everywhere except the Mid-Coast to Mendocino zone where ERC values are forecast to rise above normal. Calmer winds will persist Tuesday through the end of the week as high pressure builds over the region. ...Discussion from SFOFWFEKA... Isolated thunderstorms will possible in NE Trinity county late this afternoon into this evening. Otherwise, dry weather with cooler temperatures expected today. Chance for light rain tonight, diminishing during the day on Saturday. Strong and blustery north to northwest winds and cooler temperatures expected this weekend behind a cold front. Warmer temperatures, drier humidity and strong gusty northeast and east winds expected Monday. Above normal warmth expected to last all next week. ##################################################################### ## ## ## Complete a discussion for each ECCDA segment below ## ## When done click transmit, product sent as KMTRFWLMTR ## ## ## ##################################################################### ECC010-031030- St Helena ECC Dispatch- DISCUSSION FOR Marin and Sonoma and Napa Counties 317 PM PDT Fri May 2 2025 Onshore winds are expected to strengthen Friday evening into the overnight hours. Strong northwest winds between 40 to 50 mph will develop along the coast early Saturday morning and persist through early Sunday morning with gusts between 30 to 40 mph across the interior. A Wind Advisory is in effect for portions of the coastline from 11 AM Saturday to 5 AM Sunday. More significant for fire weather concerns, strong offshore winds will develop across the North Bay Interior Mountains and East Bay Hills late Sunday into Monday. These winds will gust between 35 to 45 mph with the strongest gusts across northern Sonoma and Napa counties. Daytime and overnight RH values will drop into the 30-40% range across much of Napa, northern Sonoma, and the East Bay Hills. Offshore winds will peak during Monday morning before diminishing by late Monday evening. ERC values are forecast to remain near average everywhere except the Mid-Coast to Mendocino zone where ERC values are forecast to rise above normal. Calmer winds will persist Tuesday through the end of the week as high pressure builds over the region. $$ ECC014-031030- Morgan Hill ECC Dispatch- DISCUSSION FOR Alameda and Contra Costa and Santa Clara Counties 317 PM PDT Fri May 2 2025 Onshore winds are expected to strengthen Friday evening into the overnight hours. Strong northwest winds between 40 to 50 mph will develop along the coast early Saturday morning and persist through early Sunday morning with gusts between 30 to 40 mph across the interior. A Wind Advisory is in effect for portions of the coastline from 11 AM Saturday to 5 AM Sunday. More significant for fire weather concerns, strong offshore winds will develop across the North Bay Interior Mountains and East Bay Hills late Sunday into Monday. These winds will gust between 35 to 45 mph with the strongest gusts across northern Sonoma and Napa counties. Daytime and overnight RH values will drop into the 30-40% range across much of Napa, northern Sonoma, and the East Bay Hills. Offshore winds will peak during Monday morning before diminishing by late Monday evening. ERC values are forecast to remain near average everywhere except the Mid-Coast to Mendocino zone where ERC values are forecast to rise above normal. Calmer winds will persist Tuesday through the end of the week as high pressure builds over the region. $$ ECC013-031030- Felton ECC Dispatch- DISCUSSION FOR Santa Cruz and San Mateo Counties 317 PM PDT Fri May 2 2025 Onshore winds are expected to strengthen Friday evening into the overnight hours. Strong northwest winds between 40 to 50 mph will develop along the coast early Saturday morning and persist through early Sunday morning with gusts between 30 to 40 mph across the interior. A Wind Advisory is in effect for portions of the coastline from 11 AM Saturday to 5 AM Sunday. More significant for fire weather concerns, strong offshore winds will develop across the North Bay Interior Mountains and East Bay Hills late Sunday into Monday. These winds will gust between 35 to 45 mph with the strongest gusts across northern Sonoma and Napa counties. Daytime and overnight RH values will drop into the 30-40% range across much of Napa, northern Sonoma, and the East Bay Hills. Offshore winds will peak during Monday morning before diminishing by late Monday evening. ERC values are forecast to remain near average everywhere except the Mid-Coast to Mendocino zone where ERC values are forecast to rise above normal. Calmer winds will persist Tuesday through the end of the week as high pressure builds over the region. $$ ECC018-031030- Monterey ECC Dispatch- DISCUSSION FOR Monterey and San Benito County 317 PM PDT Fri May 2 2025 Onshore winds are expected to strengthen Friday evening into the overnight hours. Strong northwest winds between 40 to 50 mph will develop along the coast early Saturday morning and persist through early Sunday morning with gusts between 30 to 40 mph across the interior. A Wind Advisory is in effect for portions of the coastline from 11 AM Saturday to 5 AM Sunday. More significant for fire weather concerns, strong offshore winds will develop across the North Bay Interior Mountains and East Bay Hills late Sunday into Monday. These winds will gust between 35 to 45 mph with the strongest gusts across northern Sonoma and Napa counties. Daytime and overnight RH values will drop into the 30-40% range across much of Napa, northern Sonoma, and the East Bay Hills. Offshore winds will peak during Monday morning before diminishing by late Monday evening. ERC values are forecast to remain near average everywhere except the Mid-Coast to Mendocino zone where ERC values are forecast to rise above normal. Calmer winds will persist Tuesday through the end of the week as high pressure builds over the region. $$