A person walks with an umbrella near the Golden Gate Bridge during heavy rain as an atmospheric river hits the San Francisco Bay Area on Nov. 13, 2025.

LATEST Dec. 18, 2:50 p.m.: New data from the National Weather Service shows back-to-back major storms could drop a month’s worth of rain in San Francisco over a few days. Dial Hoang, a meteorologist at the weather service, said preliminary estimates show multiple weather systems coming through the Bay Area in the next few days, including a system arriving on Tuesday, that could drop around 3 to 4 inches of rain over Christmas Eve and Christmas.

When combined with two earlier storm systems, San Francisco could see over 7 inches of rain in the next week, well over December's monthly average rainfall of 4.76 inches, Hoang said.

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“We're going to see a lot of impacts with regards to local flooding and especially roadways, streams and creeks,” Hoang told SFGATE. “We are encouraging people if they do come across flooded roadways, turn around and don't drown.” 

The Tuesday storm is expected to come from the south and drop 2 to 3 inches in Monterey Bay. The East Bay is also expected to get........

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