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 >

Winter/Spring Flood Outlook

The Winter/Spring Flood Outlooks have ended for the 2025 season. These outlooks will resume in the Winter/Spring season of 2026. 

This is the graphical bi-weekly winter/spring ESF product as seen below. If you have any questions, concerns or feedback please email our Hydrology Program Manager. Image opens in new tab expanded when clicked on.