National Weather Service United States Department of Commerce

Severe Thunderstorms and Excessive Rainfall in the Central U.S.; Excessive Heat Across the Western and Southern U.S.

Severe thunderstorms will be possible on Independence Day, mainly across parts of the Upper Mississippi Valley, Ozarks, and southern/central Plains. Excessive heat with possible record highs and warm overnight lows will continue to impact much of the West into next week. Dangerous heat is expected across the Southern U.S. and Mid-Atlantic into the weekend. Read More >

Probability of Exceedance Legend


0-19% Chance 20-39% Chance 40-59% Chance 60-79% Chance 80-100% Chance


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NOTICE:This is an experimental page meant to provide information on the potential for heat impacts in the Grand Canyon. Please contact Tony Merriman at [email protected] to provide any feedback.




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