, Issued at 1055 AM PDT Mon Apr 27 2026 (This afternoon through tonight)
Isolated light rain showers are continuing with the help of remnant surface troughing across the Bay Area. Activity will wane this afternoon, giving way to a mix of Sun and clouds and below normal temperatures. With remnant moisture, low clouds will return to bayshore and coastal locations tonight as the lower levels restabilize.
..issued at 1055 AM PDT Mon Apr 27 2026 (Tuesday through Sunday)
The upper-level troughing that brought us light rain over the weekend will pinch off a cutoff low as upper-level longwave ridging moves in from the Eastern Pacific Ocean. This will result in a warming and drying trend with temperatures rebounding to near to slightly above normal. The warmest day of the week will be on Thursday for the Bay Area and Friday for the Central Coast. The locations of the two features, ridge over the Pacific Northwest and low off the coast of Southern California, will support light offshore flow during the overnight hours. Subsidence aloft and offshore flow in the higher terrain will likely yield a shallow marine layer that will only impact coastal locations. Global ensemble clusters are in agreement that the ridge will get tamped down by an approaching upper-level trough as we approach the weekend. There is some uncertainty on how we get there, but by Sunday it is likely that there will be an upper-level low off the California Coast. While there's no measurable precipitation in the forecast right now, this will renew chances for rainfall as we head into next week.
(18z TAFS) Issued at 1030 AM PDT Mon Apr 27 2026
In the wake of the surface trough there are numerous cumulus clouds across the cwa. Most of these clouds have bases in the low VFR range and the coverage should scatter out as the day goes on and drier air continues to filter in. As the lower atmosphere stabilizes overnight there is a good chance for MVFR stratus to develop across all terminals.
Vicinity of SFO, Winds will gradually increase to a moderate westerly breeze this afternoon with persistent scattered clouds that may occasionally form a low VFR ceiling. The winds will decrease overnight and there is a 50% chance for an MVFR ceiling between 12Z and 16Z Tuesday morning before the clouds clear.
SFO Bridge Approach, Similar to SFO.
Monterey Bay Terminals, There is still an outside chance for a quick shower at the southern terminals, but the radar activity is greatly waning. The associated ceilings will linger through the day, but shouldn't drop to MVFR until tonight.
(today through Saturday) Issued at 1030 AM PDT Mon Apr 27 2026
Moderate NW winds will persist through Tuesday before gradually increasing to a fresh to strong breeze Wednesday through Friday. These stronger winds will build rough seas of 8-12 feet across exposed waters.
Ca, None. PZ, Small Craft Advisory from 9 PM this evening to 9 AM PDT Wednesday for Pt Arena to Pt Reyes 10-60 NM.
