National Weather Service United States Department of Commerce

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. 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