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 >

Reservoirs may have a variety of uses from flood control to water supply to electricity generation. Reservoir storage levels can be an indicator of long term water supply deficiencies and drought.

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Interactive map of water supply for reservoirs in Oklahoma, Texas, and Louisiana