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 12:12:31 pm MDT

Watches, Warnings & Advisories

National Weather Service Grand Junction, CO

National Weather Service NWS Flagstaff, AZ

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National Weather Service NWS Tucson Arizona

Extreme Heat Warning

Hazardous Weather Outlook

Lunar Eclipse

Severe Storms Today

Today's Highs & Precip Chances

Temp & Precip Outlook

Hazardous Heat

A near-total lunar eclipse will occur Thursday evening (96% totality). The greatest eclipse will occur at 10:13 PM MDT. Look for the moon low in the southeastern sky. Remnant clouds from thunderstorms Thursday will lead to patchy viewing opportunities.

There is a marginal risk of severe storms capable of producing large hail and damaging winds in most locations along and east of the central mountain chain this afternoon and evening.

Greater coverage of storms today. A few storms along and east of the central mountain chain may turn severe with a risk of large hail, damaging winds, and locally heavy rainfall.

Record and near-record heat will continue for the rest of the week. Increased storm coverage and rainfall intensity through Thursday, then wetter again this weekend and early next week.

Heat can escalate quickly. Warm temperatures can quickly become dangerous. Heat is one of the most deadly weather hazards - don't underestimate it. Never leave people or pets alone in a car. Drink plenty of water, even if you don't feel thirsty. Wear loose-fitting, light-colored clothing. Spend time in air conditioning and in the shade.