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Severe Thunderstorms and Heavy Rainfall in the Ohio Valley and Great Lakes; Winter Weather in the Northern Tier

A slow moving front extending from the Great Lakes region into the Plains will bring snow, wintry mix, and ice accumulation north of the front from the Upper Midwest into New England, and severe weather and heavy rain south of the front. Scattered severe thunderstorms with damaging gusts, severe hail, and heavy rain are expected across parts of the Great Lakes/Midwest through tonight. Read More >

Overview

During the evening of July 13, 2024, a cluster of supercells moving southeastward out of Montana merged into a line of significantly severe thunderstorms that brought destructive winds to much of western and central South Dakota. Widespread measured wind gusts of 80 mph or greater were recorded from near the Montana/South Dakota state line eastward to near the Missouri River, with the highest gusts of over 100 mph observed in Butte County.

The Storm Prediction Center classified this line of storms as a "derecho", a term reserved for especially widespread, long-lived, and significant wind storms.

Image
Wind damage from 7 miles west of Redig, SD
(courtesy Ashley Secrest)
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