Scattered severe thunderstorms are forecast Tuesday from the southern Plains into the southern Great Lakes vicinity. Thunderstorms may also produce heavy to excessive rain that could pose a flooding threat from central Texas into southern Oklahoma and northern Missouri into southern Michigan. A heavy wintry mix is forecast for the Great Lakes into northern Maine. Read More >
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980 FXUS66 KMTR 100337 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 837 PM PDT Mon Mar 9 2026 ...New UPDATE, MARINE... .KEY MESSAGES... Updated at 120 PM PDT Mon Mar 9 2026 - Near normal temperatures today and Tuesday - Breezy conditions along the coast and coastal mountains today - Above normal temperatures return Wednesday, warming to well above normal into next weekend && .UPDATE... Issued at 831 PM PDT Mon Mar 9 2026 Some low clouds have developed along the Big Sur Coast and across the Monterey Bay region, with patches of cloud popping up near Gilroy, Watsonville, and the southern part of the San Mateo County mountains. Widespread stratus coverage is expected to be limited to the South Bay and Central Coast as high clouds to the north disrupt cloud formation processes. The forecast remains on track with no changes at this time. DialH && .SHORT TERM... Issued at 120 PM PDT Mon Mar 9 2026 (This evening through Tuesday) Another pleasant day across the region this afternoon under mostly sunny skies. Temperatures are forecast to warm into the lower 60s near the coast and into the mid 70s across the interior. However, these temperatures are still some 3-10 degrees above seasonal averages. Tonight, there is moderate confidence for low clouds to return to the Monterey Bay region and coastal areas late this evening and linger into early Tuesday morning. Elsewhere, mostly clear sky conditions are forecast to prevail. Thus, Tuesday morning`s low temperatures are forecast to largely be in the lower 40s (North Bay Valleys) to upper 40s regionwide. For Tuesday afternoon, expecting slightly cooler temperatures than today as a weak dry frontal boundary sags southward across the region. However, temperatures will be closer to normal with low 60s near the coast and upper 60s to lower 70s across the interior. && .LONG TERM... Issued at 120 PM PDT Mon Mar 9 2026 (Tuesday night through next Sunday) The warming trend will begin on Wednesday as high pressure from the west begins to build into the region. The warming trend is anticipated to continue into this weekend and potentially even into early next week. By Sunday and Monday, temperatures in the warmest interior spots have a 50%-90% probability of exceeding 90 degrees F. These temperatures would be 15-25 degrees above seasonal averages if they were to materialize. However, we are not anticipating any strong offshore winds with this event as the center of the high pressure builds right overhead. Overnight and early morning temperatures will also warm into the upper 40s to middle 50s Friday and Saturday mornings. These values warm into the mid-to-upper 50s by Sunday morning. As such, we are currently forecasting Moderate HeatRisk across much of the region this upcoming weekend. As such, no rain chances are expected through the next 7 days and potentially through the next 14 days. Stay tuned as we refine the forecast throughout the remainder of the week and into the weekend. && .AVIATION... (00Z TAFS) Issued at 446 PM PDT Mon Mar 9 2026 Strong NNW winds will continue along the coast through the TAF period. These will directly impact HAF and periodically reach the other coastal terminals throughout the TAF period. The stratus coverage overnight will likely be similar to yesterday (impacts at HAF, MRY and SNS), but a deeper marine layer and stronger winds will bring higher ceiling heights and less chance for fog formation. Vicinity of SFO...WNW winds are funneling through the San Bruno gap bringing ocassional gusts above 25 knots. These strong winds will continue through the evening before decreasing overnight as the lower atmosphere stabilizes. There is 20% chance of MVFR ceilings early Tuesday morning, with VFR conditions more likely. Strong WNW winds will return Tuesday afternoon. SFO Bridge Approach...Similar to SFO. Monterey Bay Terminals...The Monterey Bay eddy will again pump low level moisture to both MRY and SNS this evening. There is a good chance for ceilings at both terminals, but the height is a little harder to pin down. The marine layer is expected to be deeper than last night, which should keep them in the 700-1500 foot range. Stronger surface winds should help limit fog formation tonight as well. && .MARINE... (Tonight through next Sunday) Issued at 831 PM PDT Mon Mar 9 2026 The gradient between strong high pressure in the Eastern Pacific and lower pressure over California is supporting strong to near gale force NW winds across the exposed coastal waters. These winds are building very rough seas of 12-15 feet. Gale conditions will continue through late Tuesday night before decreasing to a fresh to strong NW breeze for the rest of the week. && .MTR WATCHES/WARNINGS/ADVISORIES... CA...None. PZ...Gale Warning until 3 PM PDT Tuesday for Pt Arena to Pt Reyes 0- 10 nm. Small Craft Advisory until 3 AM PDT Wednesday for Pigeon Pt to Pt Pinos 0-10 nm-Pt Pinos to Pt Piedras Blancas 0-10 nm-Pt Reyes to Pigeon Pt 0-10 nm. Gale Warning until 3 AM PDT Wednesday for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 10-60 NM. && $$ SHORT TERM...RGass LONG TERM....RGass AVIATION...Flynn MARINE...Flynn 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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