National Weather Service United States Department of Commerce

Heavy Rain and Flash Flooding Concerns in California; Heavy Snow in the Sierra

An atmospheric river will bring heavy rainfall to lower elevations of California this week, and heavy snow to the Sierra Nevada mountains. Flash flooding, some of which may be locally considerable, will be a concern on the western foothills of the Sierra Nevada mountains through Tuesday. Landslides, rockfalls and mudslides are possible in the Southern California mountains. Read More >

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Last Map Update: Wed, Dec 24, 2025 at 9:42:26 pm CST

Unseasonably warm conditions continue this week, with mornings cloudy and foggy. Dense morning fog is possible in some locations. Colder conditions are forecast to return early next week.
Please join us at St. Edward's University in Austin on February 28, 2026, to learn about flooding, tornadoes, and other severe weather hazards, as well as how to stay prepared. For more info, please scan the QR code in the graphic or visit our calendar at http://weather.gov/ewx/training.