Issued at 910 PM PST Wed Nov 26 2025
Quick update to the forecast tonight to add in a dense fog advisory for the East Bay Valleys and Northern San Francisco Bay. Observations, both weather stations and cameras, are indicating lowering visibilities. Like previous nights, this will likely hold through sunrise hours. Hardest hit areas will be far Eastern Contra Costa County and the Delta. Otherwise, expect another crisp night and early morning followed by a beautiful Thanksgiving Day. Drive safe is going over the hills and through the woods. There will be a lot of us on the road, and with fog, it can be a recipe for issues.
, Issued at 124 PM PST Wed Nov 26 2025 (This evening through Thursday)
Seeing less cloud cover compared to yesterday at this hour. Thus, a greater potential to reach our high temperatures this afternoon. Temperatures will warm into the lower 70s across the Central Coast and Santa Cruz Area, approach 70 degrees F in the North Bay, and 60s across much of the remainder of the region. This is as moderate, dry offshore flow persist in the higher elevations and a mid/upper level ridge axis is currently in place aloft.
Tonight, again expecting less widespread coverage of low clouds and fog. However, cannot rule out patchy to areas of dense fog across the North Bay valleys, East Bay valleys, and the Santa Clara Valley overnight. Temperatures overnight are forecast to be mostly in the upper 30s to lower 40s. In the higher elevations, we can expect temperatures to be in the mid 50s to lower 60s due to continued offshore winds.
Any low clouds and/or fog that does develop will give way to mostly sunny skies by Thursday afternoon. This will again allow temperatures to be up to 10 degrees above seasonal averages. Overall, within a few degrees of what today's forecast high temperatures will be.
..issued at 124 PM PST Wed Nov 26 2025 (Thursday night through next Tuesday)
Thursday night and into Friday an upper level trough is forecast to move into the Pacific Northwest. This will bring a weak, dry frontal boundary across the Bay Area and Central Coast cooling temperatures to near seasonal averages. A general troughing pattern will persist over the region through early next week as high pressure builds offshore. Thus, look for weak to moderate offshore flow in the higher elevations, dry conditions, and temperatures near seasonal averages.
(06z TAFS) Issued at 953 PM PST Wed Nov 26 2025
Fog is spreading into the North Bay and East Bay Valleys with visibilities dropping. Drier air should keep fog more confined tonight with highest confidence in fog reaching STS and LVK. Low to moderate confidence that fog will at least temporarily reach APC and SJC tonight. If the fog does become more expansive overnight there may be decreases in visibility at OAK and potentially SFO as well. Fog cover should dissipate by late morning with VFR through the rest of the TAF period. Winds are generally light and offshore with periods of more moderate winds during the daytime. A more typical marine layer pattern looks to return Thursday night with decreases in visibility and ceiling heights possible as early as 03Z.
Vicinity of SFO, VFR with some potential for visibility to drop early tomorrow morning. Confidence is low that fog will make it to SFO but if it does the most likely timing will be between 10Z-16Z. Winds generally remain light and offshore through this afternoon with moderate onshore winds to return tomorrow evening.
SFO Bridge Approach, Similar to SFO.
Monterey Bay Terminals, VFR through the TAF period. Moderate SE drainage winds develop at SNS early tomorrow morning before easing by the afternoon. Winds generally stay offshore at both sites but may become more NNW to NW during the afternoon hours.
(tonight through next Tuesday) Issued at 953 PM PST Wed Nov 26 2025
High pressure along the coast will keep gentle to moderate northerly winds over the coastal waters through tonight. Patchy dense fog will be possible again tonight, especially in the West Delta. A weak dissipating cold front will bring increasing northerly winds and steep seas Thanksgiving through Friday.
Ca, Dense Fog Advisory until 10 AM PST Thursday for CAZ510.
PZ, Dense Fog Advisory until 10 AM PST Thursday for SF Bay N of Bay Bridge.
Small Craft Advisory from 9 PM Thursday to 9 AM PST Friday for Pt Pinos to Pt Piedras Blancas 0-10 nm.
Small Craft Advisory from 3 PM Thursday to 9 AM PST Friday for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 10-60 NM.
