National Weather Service United States Department of Commerce

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 >

NOTE: The information displayed on this page is derived from the Real-Time Mesoscale Analysis (RTMA) and may be subject to errors. All data should be considered preliminary and may be subject to revision. Official climate data can be obtained from the National Centers for Environmental Information.

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