The National Weather Service San Francisco reports a fairly quiet weather pattern today, but it won't stay that way long. Starting Saturday, a weak frontal boundary ushers in increased clouds and rain, primarily drenching the North Bay before trailing southward.
The mercury isn't expected to swing dramatically in the coming days, with daytime highs sticking close to seasonal averages before tonight, "expecting increased moisture as the upper level low nears the coast," the National Weather Service San Francisco states. Interior regions will see temperatures in the upper 70's to mid 80's, while coastal areas hover in the 60's. With low clouds marching inland into the coastal valleys, the night-time is set to cradle the upper 40's to mid 50's.
By early Saturday morning, the rain will begin to creep its way across the North Bay, an unfolding confirmed by an NWS Bay Area X post, indicating a southward procession of the wet weather throughout the day before dissipating before it gets to the Central Coast. Rainfall is not anticipated to be heavy, with coastal Sonoma and Marin counties absorbing between 0.15 and 0.30 at most, while lighter showers sprinkle less than 0.10 in Napa and San Francisco counties.
Rain is forecast to spread across the North Bay early Saturday morning. It will then move southward throughout the day before dissipating before it gets to the Central Coast. Rainfall amounts are expected to be light. #CAwx #BayAreaWX pic.twitter.com/9IAe3U9EJj
— NWS Bay Area 🌉 (@NWSBayArea) October 11, 2024
After the rain, Sunday may offer a brief respite, with an isolated shower possibility and a striving sun appearing by the afternoon. But the respite will be short-lived. The week begins on Monday under the influence of a rebuilt ridge. Tuesday greets us with warmer temperatures, but "an active long wave pattern will allow ridging to rebuild," the National Weather Service San Francisco foreshadows. A more impactful weather system is likely by Wednesday, potentially soaking the Bay Area with more widespread rainfall.
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