The NWS San Francisco CA issued a flood warning at 11:10 p.m. on Monday in effect until Wednesday at 10 p.m. The NWS states, "Urban areas and small streams flooding caused by excessive rainfall is expected for central Sonoma county."

An atmospheric river brought additional rain, strong winds, and flooding to the Bay Area Tuesday, and thunderstorms were threatening to add to the storm's impacts.

The Bay Area woke up on Tuesday to the sound of pattering rain from a winter storm that soaked the region overnight, and forecasters say it’s only expected to intensify as a cold front moves through this afternoon.

The National Weather Service on Tuesday issued a flood warning for Sonoma County due to excessive rainfall across the region. The warning is in effect through 10 p.m. Wednesday, the weather service said.