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: Wed, Dec 24, 2025 at 8:30:11 am PST

Watches, Warnings & Advisories

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National Weather Service San Joaquin Valley, CA

National Weather Service Los Angeles, CA

Flash Flood Warning

Winter Storm Warning

High Wind Warning

Storm Warning

Gale Warning

Storm Watch

Flood Advisory

High Surf Advisory

Small Craft Advisory

Hazardous Seas Warning

Wind Advisory

Beach Hazards Statement

Flood Watch

High Wind Watch

Marine Weather Statement

Severe Weather Outlook Wednesday

Flood Watch

Beach Hazards Statement

Extremely Dangerous Marine Conditions

The SPC has issued a marginal risk (dark green) of severe thunderstorms and a 2% probability of tornadoes for coastal portions of the Bay Area and Central Coast on Wednesday, December 24th. Have multiple ways to receive warnings and stay weather aware tomorrow. #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!

A Beach Hazards Statement has been extended through 4 AM Friday for all beaches along the Pacific Coast. Hazardously strong winds will cause dangerous conditions at the coastline, including blowing sand, wind waves up to 20 feet, and poor visibility. Avoid the beach! #CAwx

Extremely dangerous marine conditions for mariners are expected this week. Storm Force winds are forecast across the coastal waters with Gale Force winds across the San Francisco Bay, and Monterey Bay starting Tuesday morning. Winds diminish to Gale Force by late Wednesday but marine conditions will remain hazardous through Friday. #CAwx