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ABC7 News Meteorologist Mike Nicco says the whole region will get wet, starting early Saturday morning.
The Bay Area will be hit with a 2 on the Storm Impact Scale.
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"It's a moderate storm," said Nicco. "We could have the potential for thunderstorms, downpours, some minor flooding. We also have the potential for damaging winds, starting at 4 a.m. Saturday morning until 4 p.m.. It's a 12-hour span where gusts could come out of the south at 45 to 65 MPH."
Nicco says Sunday's storm will come in from the north-west and slide down to the south-east.
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"That means during the afternoon and evening hours, expect even heavier rain and the potential for more flooding and ever faster winds with a second storm, Sunday afternoon," said Nicco.
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Welcome to our last freezing cold morning. Tonight's storm brings milder lows. pic.twitter.com/RYylrSOYp9— Mike Nicco (@MikeNiccoABC7) January 4, 2019