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 >

CoCoRaHS - NWS Bismarck

 

 

   
Precipitation Type One Page Instructions 2-Minute Training Videos
Heavy Rain/Flooding Measuring and Reporting Heavy Rain/Flooding

Hail

Measuring and Reporting Hail
 

Heavy Snow

Measuring and Reporting Heavy Snow