Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

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Last Map Update: Thu, Dec 25, 2025 at 11:34:25 am PST

Watches, Warnings & Advisories

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National Weather Service San Joaquin Valley, CA

National Weather Service Los Angeles, CA

Special Marine Warning

Winter Storm Warning

High Wind Warning

Storm Warning

Avalanche Warning

Gale Warning

Winter Weather Advisory

Flood Advisory

High Surf Advisory

Small Craft Advisory

Wind Advisory

Beach Hazards Statement

Flood Watch

Marine Weather Statement

Severe Weather Outlook Thursday

Flood Watch

Beach Hazards Statement

The SPC has issued a marginal risk (dark green) of severe thunderstorms and a 2% probability of tornadoes for the Bay Area and Central Coast on Thursday, December 25th. Have multiple ways to receive warnings and stay weather aware. #CAwx

A Flood Watch has been extended through 10 PM Friday across the North Bay, and has been issued from 10 AM Tuesday through 10 PM Friday for the rest of the Bay Area and Central Coast. Moderate to heavy rain associated with an atmospheric river will bring 2-5" in the valleys, with up to 6-8" in the coastal mountains. Creeks and streams could see rapid rises during and after heavy rainfall. Standing water is likely in urban areas and on low-lying roadways. Remember: Turn around, don't drown!

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Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

NWS Forecast Office San Francisco, CA