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 >

December 2022 will go down in the books as having been cold and snowy, thanks in large part to a couple of potent winter storm systems in the middle and later parts of the month. Find all the details for select locations in the graphics below. Some of the highlights include: Pierre recorded their 4th wettest and 3rd snowiest December on record, Mobridge recorded their 5th wettest December on record, Sisseton recorded their 5th wettest and 2nd snowiest December on record, Kennebec recorded their 2nd wettest and 3rd snowiest December on record, Timber Lake recorded their 4th wettest and 3rd snowiest December on record, and Wheaton recorded their 2nd wettest December on record.