Issued at 120 PM PDT Tue Sep 9 2025 (This evening through Wednesday)
Radar returns are showing isolated showers lingering in some parts of the Bay Area and Central Coast, with a blob of showers setting up around 100-200 miles to the west of San Francisco. The chance for isolated to scattered showers, some of them relatively intense, continues through the day and into the overnight hours, with convective probabilities focused on the northern regions of Sonoma and Napa counties. Probabilities for thunderstorms in the area reach 10-15% this afternoon and evening, with the chances for convection decreasing as you go southward through the Bay Area. Should convective showers develop, accumulations could reach a quarter of an inch, with gusty winds and lightning being the other key hazards. Outside of thunderstorms, the rain will generally be beneficial, with accumulations up to one tenth of an inch of rain. Remember: When thunder roars, go indoors! Or, see a flash, dash inside!
The chance for showers continues into Wednesday, as the deepening of the upper level low bottoms out, creating rather elevated chances (15-25% probability) for convective activity in the North Bay during the afternoon and evening.
