National Weather Service United States Department of Commerce


A derecho (long-lived line of thunderstorms with intense winds) produce widespread wind damage across Iowa, northern Illinois, and northern Indiana on August 10, 2020. Many areas had hurricane-force wind speeds in excess of 75 mph, including some 100-115 mph wind gusts in eastern Iowa. Eleven tornadoes also occurred across northern Illinois. Between the winds and the tornadoes, a widespread region of the Midwest saw extensive damage to trees, power lines, buildings, and vehicles. 

Event summaries from elsewhere along the track can be found at the following links:

Radar progression of the derecho. Image courtesy NWS Chicago
Radar progression of the derecho between 8 am and 7 pm CDT.
Image courtesy NWS Chicago.
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