FXUS66 KMTR 041940 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 1140 AM PST Thu Dec 4 2025 ...New SHORT TERM, LONG TERM... .KEY MESSAGES... Updated at 1139 AM PST Thu Dec 4 2025 - Persistent forecast through the next seven days with benign conditions and no precipitation expected - Hazardous cold conditions continue in the interior Central Coast Friday morning - Impacts from Tule Fog continue in the interior East Bay && .SHORT TERM... Issued at 1139 AM PST Thu Dec 4 2025 (This afternoon through Friday) Satellite imagery shows lingering stratus in the interior East Bay, an outgrowth of the Tule Fog across the Central Valley, and the very southern portion of the Salinas Valley. Isolated patches of higher clouds are scattered across the region. The general weather pattern continues to be dominated by ridging in the eastern Pacific, which has been edging into the western United States after a trough pulled away into the Central United States. The large scale flow continues to come from the north, and generally mild offshore flow persists across the higher elevations of the Bay Area, although as the offshore gradient begins to significantly weaken, the offshore flow will likewise decrease. Expect another round of Tule Fog impacts tonight into Friday morning, mainly across the interior Bay Area with potential impacts in the North Bay valleys. Highs today range from the upper 50s to the middle 60s across the lower elevations, except in the interior East Bay where highs remain in the lower 50s. A Cold Weather Advisory remains in effect for the interior Central Coast, including the southern Salinas Valley, for the midnight to 8 AM timeframe on Friday morning, as lows reach the lower to middle 30s generally and down into the 20s for isolated locations in the higher elevations. Elsewhere, lows range from the lower to middle 40s in the lower elevations, reaching into the upper 40s in the higher elevations. Temperatures in the interior East Bay are expected to warm slightly tomorrow into the lower 60s, while the rest of the region sees highs around 1 to 2 degrees warmer than today's. && .LONG TERM... Issued at 1139 AM PST Thu Dec 4 2025 (Friday night through next Wednesday) The forecast conditions remain so stable that a lot of my discussion from yesterday still applies. We are still expecting the ridging to build into the southwestern US, promoting a gradual warming trend through the early part of next week with the inland valleys reaching the upper 60s to middle 70s. We are still expecting a couple of storm systems to get deflected into the Pacific Northwest and leave us with offshore showers, potential light drizzle in the Sonoma coastal ranges, and disappointment for fans of wet weather everywhere else. We are still seeing the next chance for widespread rain towards the middle of the month with very high levels of uncertainty for that part of the forecast. && .AVIATION... (18Z TAFS) Issued at 942 AM PST Thu Dec 4 2025 VFR trough the TAF period, with the exception of KLVK which is currently IFR this morning and forecast to improve to VFR by early afternoon. Light to moderate offshore winds prevail this morning before becoming north-northwesterly this afternoon across the Bay Area and Monterey Bay terminals. Friday morning, there is a low probability (less than 25% chance) of LIFR ceilings and/or visibilities for KSTS. Winds diminish overnight with greater probability of onshore winds by Friday afternoon. Vicinity of SFO...VFR through the TAF period. Offshore winds prevail this morning and are expected to become north- northwesterly by mid- to-late afternoon. Winds diminish overnight with greater probability of onshore winds by Friday afternoon. SFO Bridge Approach...Similar to SFO. Monterey Bay Terminals...VFR through the TAF period. Light to southerly winds prevail this morning and are forecast to become onshore by early-to-mid afternoon. Winds diminish overnight and become southerly early Friday morning. && .MARINE... (Today through Tuesday) Issued at 831 AM PST Thu Dec 4 2025 Winds are diminishing and seas are subsiding. Expect mostly calm conditions into the night before breezy to gusty northwest winds return with rebuilding seas up to 8 feet by Friday. Winds stay breezy into the next work week, but seas abate in the early week. && .MTR WATCHES/WARNINGS/ADVISORIES... CA...Coastal Flood Advisory until 3 PM PST Sunday for CAZ006-506-508- 529-530. Cold Weather Advisory until 8 AM PST Friday for CAZ516-518. PZ...Small Craft Advisory from 9 AM Friday to 3 AM PST Saturday for Pt Arena to Pt Reyes 0-10 nm. Small Craft Advisory from 9 PM this evening to 3 AM PST Saturday for Pt Arena to Pt Reyes 10-60 NM. Small Craft Advisory from 3 AM Friday to 3 AM PST Saturday for Pigeon Pt to Pt Pinos 10-60 NM. && $$ SHORT TERM...DialH LONG TERM....DialH AVIATION...RGass MARINE...RGass 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