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 >

Click a location below for detailed forecast.

Last Map Update: Thu, Dec 25, 2025 at 6:00:21 am PST

Watches, Warnings & Advisories

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National Weather Service San Francisco Bay Area, CA

National Weather Service San Joaquin Valley, CA

Flash Flood Warning

Winter Storm Warning

High Wind Warning

Storm Warning

Avalanche Warning

Gale Warning

Winter Weather Advisory

Flood Advisory

Wind Advisory

Beach Hazards Statement

Avalanche Watch

Flood Watch

Winter Storm Warning

Winter Hazards - Greater Reno Area

Wind Hazards

Backcountry Avalanche Watch

Sierra Travel Forecast

Winter Storm Warning for NE California, Tahoe, and Mono Co in effect until10 AM Friday. Expect significant travel impacts through Friday.

A Winter Weather Advisory for the Greater Reno-Carson City-Minden area in effect from 4 AM Thursday until 4 AM Friday. Snow impacts are most likely above 5500 feet where 2 to 6 inches (locally up to 10”) is expected by Friday morning. Heaviest snowfall is anticipated Thursday night into Friday morning, but periods of light snow is possible all Thursday. High uncertainty in snow down to valley floors, but a trace to 1” of snow is on the table Thursday night into Friday AM.

A Wind Advisory has been issued for the Surprise Valley, N Washoe County, and W NV Basin and Range counties, in effect 4 AM Thursday until 10 PM Thursday.

The Sierra Avalanche Center has issued a Backcountry Avalanche Warning for the Greater Lake Tahoe area in effect until 4 AM Friday 12/26/2025.

Your well-awaited Sierra Travel Forecast is here for the days surrounding Christmas! 👀🎄🚗🏔️ The best time to travel over the passes ahead of the 25th will be Tuesday (the 23rd). To stay up to date on road conditions, visit CalTrans QuickMap and NV Roads.