Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

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Last Map Update: Thu, Aug 27, 2026 at 8:22:35 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

Air Quality Alert

Thunderstorm Outlook Today

Thunderstorm Outlook Friday

Thunderstorm Probabilities Thursday and Friday

Thunderstorm Probabilities Friday and Saturday

Excessive Rainfall Outlook

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 to scattered thunderstorms are expected across much of Northern and Central Nevada from 12 PM PDT Friday afternoon until 9 PM PDT Friday evening. A few of these thunderstorms could be strong with wind gusts to 50 mph along with brief moderate to heavy rain. Additional impacts include cloud to ground lightning and small hail.

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.

A much more moist air mass will be pushing into northern and central Nevada Friday and Saturday. As a result, the best chances for thunderstorms will be centered across central and eastern Nevada on both days. These storms could bring strong wind gusts to 50 mph along with brief moderate to heavy rain and dangerous cloud to ground lightning.

Isolated to scattered showers and thunderstorms will develop across northern and central Nevada from 12 PM PDT Friday afternoon until 9 PM PDT Friday evening. Small hail and wind gusts near 50 miles per hour are a couple of hazards associated with strong thunderstorms. In addition to dangerous cloud to ground lightning strikes, any thunderstorm can produce intense rainfall rates, leading to localized flooding and debris flows.