The first of what the National Weather Service said is expected to be three systems bringing rain spilled mostly light precipitation throughout the East Bay and South Bay.
Next comes dry weather until the weekend, the agency said.
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“We anticipate the next system coming in Friday night, and maybe more so into Saturday morning,” meteorologist Roger Gass said Thursday morning. He added that “there’s still a lot of uncertainty in that one” regarding how much rain will fall and how gusty winds will become.
The system Wednesday had its biggest effect on the North Bay. An inch of rain fell on Mount St. Helena, and nine-tenths fell in Santa Rosa during a 24-hour period ending at 5 a.m., according to the weather service.
The rainfall was much lighter in the East Bay and South Bay. About three-quarters of an inch fell atop Mount Diablo, but lower elevations did not see as much. About one-third of an inch fell in Orinda in Contra Costa County and about two-tenths fell in downtown Oakland. San Jose saw barely more than one-tenth of an inch.
Building westerly swell on Saturday will result in large breaking waves and dangerous beach conditions through Sunday. Breaking waves of 18 to 22 feet (locally up to 28 ft) possible. #CAwx #NeverTurnYourBackToTheOcean pic.twitter.com/GfmtYPrvrL
— NWS Bay Area (@NWSBayArea) February 15, 2024
The region mostly was expected to be dry through Thursday, Gass said. Scattered, occasional light showers may fall periodically in areas of the North Bay, he said.
Gass said the next system is expected to bring strong, gusty winds out of south and cause the ocean surf from coastal Sonoma County to the Monterey coast to rise as high as 18 to 22 feet in most places and possibly as high as 28 feet in others.