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 >

MPX Recommended Spotter Activation Status

 

Map of MPX CWA  

Spotter activation is recommended for the counties listed in Red, Spotter activation is not recommended for counties in Green. The data on this page will automatically update every 2 minutes.


Local Radar

Severe Weather Outlook

Current Watches and Warnings

 

Disclaimer: Information displayed on this page is solely a recommendation for spotter activation by the NWS, may differ from local guidelines, and may not be updated as quickly or often as other official NWS products. Please use local notification procedures if applicable. Do not solely rely on this activation page as your only source of severe weather information - Please use additional information like outlooks, watches, and warnings to plan and prepare as needed.