Severe Thunderstorm and Tropical Storm Bertha Impacts

Numerous severe thunderstorms are expected across a broad region from the Ohio Valley to the Mid-Atlantic and Northeast States today into tonight. Swaths of damaging wind gusts are expected and some tornadoes are possible. Bertha is expected to bring tropical storm conditions to portions of the Gulf Coast from the Florida Panhandle westward to southeastern Louisiana later today and Wednesday. Read More >

Click a location below for detailed forecast.

Last Map Update: Tue, Jul 21, 2026 at 11:52:42 am PDT

Watches, Warnings & Advisories

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National Weather Service San Francisco Bay Area, CA

National Weather Service San Joaquin Valley, CA

Heat Advisory

Flood Watch

Mountain Thunderstorm Chances

Elevated Fire Weather Conditions

Forecast High Temperatures

Lightning Safety

Tuesday, July 21, 2026, most likely from 12pm to 8pm

Minor risk, Today July 21 to Wednesday July 22, 2026

Seasonable temperatures are expected across the region through the weekend and into next week.

Lightning Safety. Take shelter indoors. Stay away from trees or tall objects. Avoid water. If you see smoke, call 911. When thunder roars, go indoors!