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 10:14:40 am PST

Watches, Warnings & Advisories

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National Weather Service San Francisco Bay Area, CA

Winter Storm Warning

High Wind Warning

Storm Warning

Avalanche Warning

Gale Warning

Winter Weather Advisory

Flood Advisory

Hazardous Seas Warning

Wind Advisory

Beach Hazards Statement

Flood Watch

Special Weather Statement

Flood Watch

⚠️ Flood Watch in Effect: Late this evening through Friday evening. Two storm systems will bring rounds of moderate to heavy rain across NW California starting Tuesday. If you live near a small stream and experienced flooding last weekend, you will probably observe flooding again. Prepare for flood impacts and stay weather-aware. Plan to avoid driving through flooded roads.