Dangerous Heat in the Southwest; Severe Thunderstorms from the Central Plains into the Ohio Valley

Dangerous heat will build across the Southwest U.S. through the end of the week with daytime highs of 110-115°F. Isolated to widely scattered severe storms are expected across parts of the central and southern High Plains, Great Lakes into the Ohio Valley, and parts of the Ozarks to Lower Mississippi Valley today. Read More >

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Last Map Update: Wed, Aug 26, 2026 at 7:18:25 am PDT

Watches, Warnings & Advisories

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National Weather Service Salt Lake City, UT

National Weather Service San Joaquin Valley, CA

National Weather Service NWS Flagstaff, AZ

Extreme Heat Warning

Red Flag Warning

Fire Weather Watch

Air Quality Alert

Thunderstorm Outlook Today

Thunderstorm Outlook Thursday

Thunderstorm Probabilities Thursday and Friday

Unseasonably Warm Today and Thursday

Cooling Trend Friday and Saturday

Isolated dry thunderstorms are expected in most of Northern and Central Nevada from 12 PM PDT this afternoon until 8 PM PDT this evening. "Dry thunderstorms" are thunderstorms that produce little or no rainfall at the surface. In combination with arid fuels (i.e. vegetation), dry thunderstorms can ignite wildfires with lightning, but will not produce much rain to put the wildfires out.

Isolated dry thunderstorms are expected in Northeastern Nevada from 12 PM PDT Thursday afternoon until 8 PM PDT Thursday evening. "Dry thunderstorms" are thunderstorms that produce little or no rainfall at the surface. In combination with arid fuels (i.e. vegetation), dry thunderstorms can ignite wildfires with lightning, but will not produce much rain to put the wildfires out.

Isolated dry thunderstorms are expected in Eastern Nevada. (pink, shaded areas) both Thursday afternoon and Friday afternoon. "Dry thunderstorms" are thunderstorms that produce little or no rainfall at the surface. In combination with arid fuels (i.e. vegetation), dry thunderstorms can ignite wildfires with lightning, but will not produce much rain to put the wildfires out.

High temperatures throughout Northern and Central Nevada both this afternoon and Thursday afternoon will be around five degrees above normal for this time of year.

High temperatures throughout Northern and Central Nevada Friday afternoon will be around five degrees cooler than Thursday afternoon. Maximum temperatures across Northern and Central Nevada Saturday afternoon will be a couple of degrees below normal for this time of year.