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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731 FXUS66 KMTR 151749 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 1049 AM PDT Sat Aug 15 2026 ...New AVIATION... .KEY MESSAGES... Updated at 1049 PM PDT Fri Aug 14 2026 - Gradual warming and drying trend Saturday and into next week && .UPDATE... Issued at 931 AM PDT Sat Aug 15 2026 No significant changes to the ongoing forecast. Drizzle was most pronounced in and around the San Francisco Bay Area this morning and less so around the Central Coast. As such, overnight and into this morning, reports of 0.01" to 0.06" were measured with ongoing drizzle anticipated to end around 10 AM or 11 AM this morning. Have also warmed temperatures by a few degrees for this afternoon as we expect an earlier retreat of stratus to the coastline giving way to mostly sunny skies across the inland areas this afternoon. RGass && .SHORT TERM... Issued at 1049 PM PDT Fri Aug 14 2026 (Tonight through Sunday) The region will remain on the eastern periphery of upper-level troughing well off the West Coast Saturday. Sensible weather wise, this`ll bring another Fogust day with temperatures well below normal, clouds in the evenings/mornings with a chance for drizzle, and onshore flow. Gusts of 20-30 mph can be expected through gaps/passes and down the Salinas Valley. While the marine layer remains deep, it doesn`t look healthy on satellite with patchwork stratus across the region. Diurnal winds will keep smoke from the Timber Fire out to sea with downsloping (easterly) winds in the morning and onshore (northwesterly) winds in the afternoon. && .LONG TERM... Issued at 1049 PM PDT Fri Aug 14 2026 (Sunday night through next Friday) Upper-level ridging will nose in from the east on Sunday and ultimately anchor itself across the Desert Southwest on Tuesday. This will result in a gradual warming and drying trend into next week. Temperatures will moderate to near seasonal normals away from and above the marine layer influence at the coast. As the marine layer compresses with subsidence aloft, its footprint will become smaller and conditions above it will become drier. Poor afternoon daytime relative humidity of 20-30% is expected for the higher terrain with locally lower values of 10-20% across the Central Coast. Recovery will remain moderate through the weekend, but by Monday little-to-none is expected with that trend continuing through Friday. This will likely lead to seasonably elevated conditions with rapid rates of spread on any wind-and-terrain aligned starts in receptive vegetation. The timeframe of most concern will be with the diurnal sea breeze in the afternoons/evenings. && .AVIATION... (18Z TAFS) Issued at 1049 AM PDT Sat Aug 15 2026 Low clouds and patchy drizzle /MVFR-IFR/ are slowly mixing out and dissipating otherwise it`s VFR. Low clouds and patchy drizzle /MVFR-IFR/ redevelop tonight and Sunday morning. Vicinity of SFO...Low clouds /MVFR/ mixing out to VFR 21z today. Low clouds /MVFR/ redevelop tonight and Sunday morning. Low clouds /MVFR/ mixing out to VFR 18z Sunday. West wind 10 knots increasing to 12 to 20 knots in the afternoon and evening. West wind decreasing to 5 to 10 knots tonight and Sunday morning. SFO Bridge Approach...Similar to SFO. Monterey Bay Terminals...Low clouds /MVFR/ mixing out to VFR in the afternoon. Low clouds /MVFR-IFR/ redevelop tonight and Sunday morning. West to northwest winds 5 to 15 knots. && .MARINE... (Today through Thursday) Issued at 931 AM 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...Sarment LONG TERM....Sarment AVIATION...Canepa 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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