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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Automatically generated image showing areas of 0-6km vertical shear.


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Shear (0-6Km)

The 0-6 km shear vector. Values generally greater than 40 knots are supportive of supercells, although in high instability environments this can be as low as 30 knots.

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

Convective Parameters Shear - 0-6km