Strong Storm System Brings Heavy Mountain Snow to the Sierra Nevada and Critical Fire Weather Conditions to the Plains

A Pacific storm system will continue to bring low elevation rain and mountain snow to much of the West through Wednesday, with heavy mountain snow expected in the higher elevations of the Sierra Nevada. This system will also bring strong winds to the Intermountain West, Rockies, and Plains, which will create Critical fire weather conditions for portions of the central and southern High Plains. Read More >

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Last Map Update: Tue, Apr 21, 2026 at 2:48:36 pm PDT

Watches, Warnings & Advisories

National Weather Service San Francisco Bay Area, CA

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National Weather Service Los Angeles, CA

Tornado Warning

Severe Weather Statement

Special Marine Warning

Winter Storm Warning

High Wind Warning

Winter Weather Advisory

Flood Advisory

Small Craft Advisory

Wind Advisory

Marine Weather Statement

Marginal Risk for Severe Weather

Thunderstorms This Afternoon and Evening

Expected Rainfall & Lightning Probability

Expected Snowfall & Lightning Probability

Wind Advisory For Mojave Desert

The Storm Prediction Center has issued a Marginal Risk for severe weather for the North San Joaquin Valley and central Sierra Foothills for this afternoon. The risk includes a 5 to 14 percent probability for severe wind (>58 mph) and a 2 to 4 percent probability of a Tornado, both within 25 miles of any point within the shaded areas of the image.

Isolated to scattered thunderstorms are expected north of Kern County (35-40% chance), with 40-45% probability across central Merced County. Remember: no place outside is safe in a thunderstorm. Stay aware!

(Update @ 8:45 AM): With unsettled weather entering our area tonight, periods of heavy rain and lightning are possible throughout the San Joaquin Valley and foothill communities through Wednesday, with Tuesday being the highest impact day. Stay aware!

(Update @ 8:45 AM): With unsettled weather entering our area tonight, periods of heavy snow and lightning are possible throughout the Sierra Nevada mountains above 7,000 feet through Wednesday, with Tuesday being the highest impact day. Stay aware!

A Wind Advisory is in effect from 2 PM PDT Tuesday until 7 AM PDT Wednesday for the Mojave slope and desert floor. West winds 20-30 mph with gusts to 50 mph are expected. Travel will be difficult, especially in high profile vehicles.