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Extreme HeatRisk and Severe Weather Concerns

Major to Extreme HeatRisk continues for parts of the Mississippi Valley, mid-Atlantic and Northeast today. Additional heat concerns are increasing for the Pacific Northwest this week. Meanwhile, a cold front continues to track southward across the center of the nation. This will focus more showers and thunderstorms, some severe alongside excessive rainfall, from the Plains to the East Coast. 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 tony.merriman@noaa.gov to provide any feedback.




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