Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

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Last Map Update: Wed, Dec 24, 2025 at 12:46:16 am PST

Watches, Warnings & Advisories

National Weather Service San Francisco Bay Area, CA

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National Weather Service Los Angeles, CA

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Latest Radar

Severe Weather Wednesday

Flash Flooding Wednesday and Thursday

Bear Creek at McKee Road Forecast

High Confidence for Heavy Rainfall, with thunderstorms as showers and thunderstorms encroach from the Southwest to the Northeast. The period of heaviest precipitation that could lead to flooding will be from 4a PST until 12pm PST.

Severe Thunderstorms with damaging wind gusts, flooding rainfall and hail. From 4a Wed to 4a Thu, highest confidence is Wednesday morning and Wednesday afternoon. There is a 5% Probability of Damaging Winds and a 2% Probability of a Tornado in the Central Valley on Wednesday. Any percent chance of a Tornado or Damaging Winds is very unusual in the Central Valley.

40% Probability of Flash Flooding near Frazier Park and extreme southern Kern County, including Tejon Pass Wednesday. 15% Probability of rainfall causing Flash Flooding in the Foothills and Eastern Kern County. 5% Probability of Flash Flooding for the the rest of the Central Valley Wednesday and Thursday. Although this may seem like a small chance, these values are very unusual for the Central Valley, and only happen a few times a year.