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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 >

Overview

A hot and humid air mass settled across the region beginning Sunday, August 25 and lasting through Monday, August 26. On Monday afternoon, heat indices exceed 100 degrees in many locations. This warm, unstable air was followed by two rounds of severe weather over the next 12 hours. 

On Monday afternoon, thunderstorms developed across western Minnesota, and formed into a line producing wind damage across central and eastern Minnesota, and western Wisconsin. Later that night into Tuesday morning, another round of storms develop and produced wind damage in eastern Minnesota and western Wisconsin.

Preliminary storm reports
Preliminary storm reports from August 26-27, 2024. For the latest storm reports, please visit the Storm Prediction Center.
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