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 >

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On the heels of a much colder than normal April, May finished much warmer than normal across the area. Most areas received below normal precipitation as well. Here are the details at select locations.

Here's a map overview of May temperature and precipitation departures from normal from the Midwestern Regional Climate Center, which uses various observations across the area and interpolates between them.

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

May 2023: Below Normal Precipitation, Above Normal Temperatures