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 >

 
 
           
Issuance
PERIOD 1 PERIOD 2
Weather Comment: None Weather Comment: None
Temperature (°F) Snow
Amount
Probability
Snow
Water Eq.
Probability
Temperature (°F) Snow
Amount
Probability
Snow
Water Eq.
Probability
 
Snow Level (kFt)
 
 
 
 
 
 
 
 
Snow Level (kFt)
 
 
 
 
 
 
 
Precipitation Intensity (in/hour) - Snow Precipitation Intensity (in/hour) - Snow click for Water
   
Precipitation Intensity (in/hour) - Water Precipitation Intensity (in/hour) - Water click for Snow
   
Snow Density (%) Snow Density (%)click for SLR
   
Snow-Liquid Ratio Snow-Liquid Ratio click for Density
   
Surface Wind (mph) Surface Wind (mph)
   
700 mb Wind (mph) 700 mb Wind (mph)
   
Probability of Lightning (%) Probability of Lightning (%)