Areas of Heavy Rain in the East; Prolonged Heavy Rain and Snowfall Event for the Northwest U.S.

A storm system crossing the eastern U.S. today will bring areas of heavy rain over West Virginia and northern Illinois. A prolonged atmospheric river event will continue to bring moderate to heavy rain to northern into central California through the Pacific Northwest with mountain snow in the Cascades and northern Rockies today into next week. Read More >

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Last Map Update: Fri, Jan 31, 2025 at 10:58:40 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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Excessive Rainfall Outlook -Saturday

72 Hour Liquid Precipitation Forecast

72 Hour Snowfall Forecast

A system moving through the region this weekend will bring periods of moderate to heavy rainfall to the San Joaquin Valley and Sierra Nevada and adjacent foothill areas. There is a 50-80% chance for accumulations of 0.5” in the valley areas through Sunday morning. There are similar probabilities (50-80%) for 1” of rainfall in the foothill areas of Mariposa, Madera, and Fresno Counties. The Weather Prediction Center has given the northern areas of our CWA a Marginal Risk (at least 5%) of excessive rainfall leading to rapid onset flooding for tomorrow and Saturday.

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Areas of Heavy Rain in the East; Prolonged Heavy Rain and Snowfall Event for the Northwest U.S.

NWS Forecast Office Hanford, CA