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 >

Briefing Sheet
NWS Latest Surface Analysis
NWS 12-HOUR Surface Forecast
NWS 24-HOUR Surface Forecast
Latest Visible Satellite
Latest Infrared Satellite
Regional Radar Mosaic
Current Convective SIGMETs
TCF 4-hour Convective Forecast (updated every 2 hours)
TCF 6-hour Convective Forecast (updated every 2 hours)
TCF 8-hour Convective Forecast (updated every 2 hours)
NWS Storm Prediction Center (SPC) - Current Day 1 Outlook (SEVERE)
NWS Storm Prediction Center (SPC) - Current Day 2 Outlook (SEVERE)
National Precipitation Forecast - 24 Hour Total
National Precipitation Forecast - 2 Day Total
National Maximum Wind Gust Forecast - 2 Day
National Snowfall Forecast - 2 Day Total
National Ice Accumulation Forecast - 2 Day Total