Heat advisories or excessive-heat watches and warnings cover the entirety of Arkansas, Mississippi, Kentucky, Missouri, Iowa, Illinois and Indiana and parts of more than a dozen other states., from Denver to Charleston, S.C.Relentless heat is forecast in St. Louis, where the mercury is predicted to hit at least 100 each of these days — with heat index values of up to 113.
Forecasts into next week call for the punishing heat wave to persist over the central states. Heat waves like this are typical staples of summer, but their impacts are made more severe and prolonged by human-caused climate change.The excessive heat is the result of an intense and sprawling zone of high pressure, sometimes referred to as a heat dome.The dome, centered over the Southwest on Saturday, has shifted east.
Temperatures in the upper 90s to near 100 could make it as far north as Minneapolis on Tuesday, with 98 in Atlanta, 97 in Chicago and 101 degrees in Raleigh, N.C. Columbia, S.C., could hit a whopping 102 degrees. The combination of heat and humidity in Charlotte on Tuesday and Wednesday — producing heat index values near 110 —On Wednesday, temperatures in the upper 90s will be ubiquitous from the central Plains and Texas through the eastern Great Lakes, Midwest and interior Mid-Atlantic and Appalachians, as well as the Southeast. Records could threaten the zone from roughly Flint, Mich., through Columbus, Ohio, and Knoxville, Tenn., to Atlanta.
The heat isn’t going anywhere anytime soon. It may shift west a bit and consolidate over the central states late this week into the weekend. The Weather Service’s Climate Prediction Center projects a continuation of above-normal temperatures in the central states over the next two weeks.Along the northern periphery of the heat dome, where the sweltering heat meets cooler air, the resulting temperature contrast is anticipated to brew severe thunderstorms.
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