A significant, long-duration winter storm will bring widespread heavy snow, sleet, and freezing rain from the Southern Rockies to New England through Monday. Widespread travel disruptions, prolonged power outages, and vast tree damage is likely. Frigid temperatures, gusty winds, and dangerous wind chills will expand from the north-central US to the Southern Plains, MS Valley, and Midwest. Read More >
| ZOA CWSU Discussion | KSFO TAF TDA | |
| AWAITING CWSU INPUT | TAF TDA KSFO/KSQL METAR METARArea PIREPs PIREP |
|
| Satellite | Webcams, Ceiling≤030 Prob | |
|
Webcams
|
||
| SIERRA 03 Hour Forecast | SIERRA 12 Hour Forecast | SIGMETs |
| TANGO 03 Hour Forecast | TANGO 12 Hour Forecast | |
| ZULU 03 Hour Forecast | ZULU 12 Hour Forecast | |
| Area Forecast Discussion | Forecast Maps |
|
592 FXUS66 KMTR 231216 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 416 AM PST Fri Jan 23 2026 ...New AVIATION... .KEY MESSAGES... Updated at 401 AM PST Fri Jan 23 2026 - Morning fog across some Bay Area Valleys and around Monterey - Gusty offshore winds across higher terrain of the North Bay Saturday - Potential weak to moderate storm system in the middle of the next work week && .SHORT TERM... Issued at 401 AM PST Fri Jan 23 2026 (Today and tonight) Reducing pressure has brought a stronger return of the marine layer tonight. This along with a reduction of high clouds, some moisture from the Central Valley, and a slight feed of moisture from the south has allowed for a good spread of stratus and developing pockets of fog. Temperatures have slowed their cooling and are almost plateauing for the areas affected by the marine layer. High-resolution short term models show that these clouds and pockets of fog will be slow to erode. The next developing ridge will begin to push weak northerly flow into the North Bay by the the late morning. The slightly drier air will help to clear the North Bay, while cloud cover farther to the south lingers into the afternoon. High temperatures will be slightly cooler than previous days because of the prolonged cloud cover, but only by a few degrees. The approaching ridge will compress the marine layer and reduce the additional feeds of moisture tonight, leading less low cloud cover and fog across the area. However the more fog-proned valleys (Sonoma Co, Salinas Valley ect) will still have good chances for fog returning tonight. && .LONG TERM... Issued at 401 AM PST Fri Jan 23 2026 (Saturday through Thursday) The eastern portion of the developing ridge will continue to build into the region into early Saturday, calling for stronger northerly to northeasterly (offshore) flow. The change in winds will lead to widespread drying into Saturday, and a mixing out of the marine layer. Morning clouds and fog will be much quicker to erode across the region and that earlier clearing along with the generally drier airflow will cause slightly warmer temps for Saturday. Higher elevations look to see breezier and gustier winds as the offshore flow increases into Saturday morning and through the day. Extra adjustments were added to the overnight forecast package to better capture the flow and speed changes, especially in the higher peaks of the North Bay. Localized gusts around 50 mph will be possible on some of the peaks, but luckily it won`t be widespread. Humidities in these elevations will suffer from these increased and drier winds, leading to some fire weather concerns with a few areas falling below 20% humidity. Winds look to reduce into that night, but humidities will struggle to recover on the higher peaks. Low cloud cover and fog will struggle to form Sunday morning because of the dry flow, but high clouds enter the area into that afternoon, leading to cooler high temps. The ridge looks to flatten into Sunday evening, with a zonal jetstream pattern taking its place, and offering more onshore flow. However the jetstream looks to snap back to a quick ridge into the next work week. This means temperatures will and some bounces up and down by a few degrees, and low cloud formation will be spotty. Despite the quick ridge development, high clouds look to move through the region as a trough develops to the west. The trough formation is well-argeed upon between the longer term models, but the trajectory is a matter of debate. More models point to a cold front, and maybe a weak low pushing through the area, bringing good chances for widespread moderate rains by the mid week. However, the GFS and its ensemble members seem keen on this trough getting pushed up against the ridge ahead of it, and placing all the moisture well to the north. The GFS output looks a bit less firm than other models and the national blend, but is something to keep in mind as the longer term models update. For now, the official forecast places rain chances in the middle of the next work week along the initial front with additional chances possible beyond the forecast period. && .AVIATION... (12Z TAFS) Issued at 416 AM PST Fri Jan 23 2026 Stratus and fog /LIFR-IFR-MVFR/ will gradually mix out to VFR by late morning or early afternoon. Tule fog from the Central Valley may also extend into the East Bay this morning. Stratus and fog redevelop tonight and Saturday morning per recent HREF output. Vicinity of SFO...Currently it`s VFR however stratus /IFR/ will develop during daybreak then lift to MVFR by late morning. VFR-MVFR tonight and Saturday morning. Mainly light and variable wind. SFO Bridge Approach...Similar to SFO. Monterey Bay Terminals...Stratus /LIFR-IFR/ lifting to MVFR by late morning. IFR stratus ceilings tonight and Saturday morning. Mainly light and variable winds except light onshore winds in the afternoon. && .MARINE... (Today through Wednesday) Issued at 401 AM PST Fri Jan 23 2026 Strong northerly breezes will prevail today with near gale force gusts in the northwest waters. Seas will build to 8-12 feet across exposed waters today through early Saturday. Conditions will improve this weekend with a gentle breeze and moderate seas. && .MTR WATCHES/WARNINGS/ADVISORIES... CA...None. PZ...Small Craft Advisory until 3 AM PST Saturday for Pt Arena to Pt Reyes 10-60 NM. && $$ SHORT TERM...Murdock LONG TERM....Murdock 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 |
|
| Yesterday | ⇛Visible ⇛Nighttime ⇛GeoColor+GLM | Today | |
| 24-Hour Temp Change | 24-Hour RH Change | ||
⇛Visible ⇛Nighttime ⇛GeoColor+GLM
 |
|
Additional Links
National Airspace System Status
Other Webcams:
Alert California San Bruno Mountain
Alert California Sutro Tower 2
Alert California Coll of San Mateo Bldg36
Follow us on X
ZOA RSS Feed