Pair of mid-level troughs forecast to bring widespread precipitation to California
Two mid-level troughs with associated surface low-pressure systems are forecast to impact California between February 14 and 19,…
Freeze warnings in effect across southern Arizona, southeastern California, and southern Nevada
Freeze warnings remain in effect across much of southern Arizona, southeastern California, and southern Nevada through Saturday morning.…
Back to back atmospheric rivers forecast to bring heavy rain and mountain snow to California
Two atmospheric rivers are forecast to make landfall over California, bringing heavy rain and snow accumulations across Southern…
Winter Storm Warnings across Sierra Nevada, White Mountains, and northern California
Winter Storm Warnings have been issued across the Sierra Nevada, White Mountains, Inyo County, Siskiyou County, Yosemite National…
Strong atmospheric river to bring heavy rain, snow, and flooding to California this week
A strong atmospheric river (AR) is forecast to bring heavy rain, mountain snow, and flooding across much of…
Strong atmospheric river to impact California, up to 500 mm (20 inches) of rain forecast for Sierra Nevada
Multiple atmospheric rivers are forecast to impact California starting today. These will bring several rounds of heavy precipitation,…
Above-normal atmospheric river activity forecast for Northern and Central California in late December
Above-normal AR activity if forecast across most of California during December 22–28. The CW3E multimodel analysis indicates the…
Downtown San Francisco records coldest daytime high for November 30 since 1922
Downtown San Francisco reached only 10°C (50°F) on Sunday, November 30, 2025–the city’s lowest daily maximum for the…
Atmospheric river brings flash-flood threat and evacuation warnings to Los Angeles, California
A multi-day atmospheric river is affecting California, with peak impacts on November 13–14. High integrated vapor transport values…
California braces for multi-day atmospheric river with elevated flash-flood potential
A strong atmospheric river is forecast to impact California through Saturday, November 15, as a deep upper-level trough…
Atmospheric river forecast to bring heavy precipitation to California from November 12 to 15
Forecast models indicate that a low-pressure system will cut off from a trough moving across the Northeast Pacific…
Heat Advisory in effect for southern California
The NWS San Diego office issued a Heat Advisory on Monday, covering the San Bernardino and Riverside County…