Summary: A well-organized and long-lived complex of storms produced widespread severe wind damage across Iowa, northern Illinois, and northern Indiana during the day on Monday, August 10. Much of this severe wind was significant (75+ mph winds) resulting in many downed trees, several toppled-over semi trucks, and many communities receiving at least some minor structural damage.Additionally, as of 2021, Augis tied with Jas the single calendar day with the 2nd most tornadoes within the NWS Chicago County Warning Area behind the "Double Derecho"event.Īugust 10, 2020, Midwest Derecho Story Map The derecho stands as one of the most impactful weather events to ever impact the NWS Chicago County Warning Area. In the NWS Chicago County Warning Area (CWA), over 160 reports of damaging winds were received and 15 tornadoes were confirmed, including an EF-1 tornado in the Rogers Park neighborhood of Chicago. Numerous injuries were counted after the storm, and four people lost their lives. ![]() More than 20,000,000 people lived in the damage footprint of the derecho, with at least 1,000,000 customers losing power - some for more than two weeks. Peak wind gusts topped 140 mph in Cedar Rapids, Iowa, and at least 26 tornadoes were spawned by the storm. The derecho resulted in $11.5B worth of damage, making it the COSTLIEST known thunderstorm event in modern U.S. On August 10, 2020, a large and intense line of thunderstorms known as a "derecho" swept across much of the Midwest producing wind damage to an area more than 90,000 square miles.
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