Lala, may become a hurricane, is expected to impact Hawaii this weekend. Heavy rainfall, strong winds, dangerous surf and localized flooding are expected. Heavy rainfall and flash flooding concerns from the mid-Mississippi Valley, Ohio Valley into the central Appalachians continues, with the threat shifting toward the mid-Atlantic later this weekend. Record heat continues for areas of the South. Read More >
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186 FXUS66 KMTR 152320 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 420 PM PDT Sat Aug 15 2026 ...New AVIATION... .KEY MESSAGES... Updated at 1234 PM PDT Sat Aug 15 2026 - Gradual warming and drying trend into next week && .SHORT TERM... Issued at 1234 PM PDT Sat Aug 15 2026 (This evening through Sunday night) A gradual warming and drying trend is forecast over the next few days as high pressure over builds westward over the Four Corners region. However, a modest marine layer is forecast to persist and result in cooler conditions near the coast. Near the coast, temperatures are forecast to be in the 60s to low 70s, bayshore and coastal valleys are likely to warm into the low 70s to low 80s, and mid 80s to low 90s across the far interior. Breezy onshore winds are expected each afternoon and evening with gusts to between 20-30 mph in the favored gaps/passes and down the Salinas Valley. Tonight, expecting another round of drizzle and/or mist along the coast and in the favored upslope coastal regions of the Bay Area. Temperatures will largely cool into the 50s to low 60s. As stratus retreats to the coastline by mid-to-late morning and early afternoon on Sunday, expecting temperatures to be a few degrees warmer than Saturday afternoon. && .LONG TERM... Issued at 1234 PM PDT Sat Aug 15 2026 (Monday through next Friday) A more notable warming and drying trend will begin on Tuesday as the mid/upper level ridge builds further to the west and spreads over the Desert Southwest. However, lingering troughiness off of the Pacific Northwest will maintain a shallow marine layer and afternoon temperatures slightly below average throughout much of next week. Overnight/morning minimum temperatures will be near normal. Above the marine layer`s influences, dry conditions are expected especially Tuesday and beyond. && .AVIATION... (00Z TAFS) Issued at 420 PM PDT Sat Aug 15 2026 Generally MVFR stratus lingers through the afternoon across the immediate coast with VFR conditions across the rest of the region. Moderate and gusty onshore pattern winds will persist into the evening hours. Overnight, IFR-low end MVFR stratus is expected to expand inland. Stratus will clear Sunday morning with breezy onshore winds expected to return in the afternoon. Beyond the TAF period, expect a compressing marine layer to lower stratus ceilings on Sunday night and limit expansion of the stratus deck inland. Vicinity of SFO... VFR conditions through the evening hours with moderate and potentially gusty west-northwest winds. IFR-low end MVFR stratus will return this evening with low confidence on the exact timing, although the model output consensus agree on the stratus developing by 06Z. Stratus clears out late Sunday morning with breezy onshore winds resuming in the afternoon and a low confidence that stratus returns in the evening before the end of the TAF period, with greater confidence in stratus impacts after it ends. SFO Bridge Approach... Similar to SFO. Monterey Bay Terminals... MVFR-IFR stratus will develop through the next couple of hours across the terminals. Breezy west winds continue through the evening hours, turning light overnight. Stratus will mix out Sunday late morning and early afternoon (moderate confidence at MRY, high confidence at SNS), with breezy northwest winds expected in the afternoon and evening hours. Stratus may return to MRY right at or shortly after the end of the TAF period. && .MARINE... (Tonight through next Thursday) Issued at 206 PM PDT Sat Aug 15 2026 A gentle to moderate northwesterly breeze persists into early next week with localized fresh gusts possible across the interior waters. A long period southerly swell of about 16 to 18 seconds will linger through Sunday. Winds increase to fresh to strong early next week and remain elevated through the end of the forecast period. Seas subside this weekend before building to 7 to 9 feet mid week. && .MTR WATCHES/WARNINGS/ADVISORIES... CA...None. PZ...None. && $$ SHORT TERM...RGass LONG TERM....RGass AVIATION...DialH MARINE...Canepa Visit us at www.weather.gov/sanfrancisco Follow us on Facebook, X, and YouTube at: www.facebook.com/nwsbayarea x.com/nwsbayarea www.youtube.com/nwsbayarea |
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