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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Volcanic Ash and Ashfall Safety
Anchorage Volcanic Ash Advisory Center
Washington Volcanic Ash Advisory Center
Montreal Volcanic Ash Advisory Center
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Alaska Aviation Weather Center
CO State Volcanic Ash Satellite Loop