National Weather Service United States Department of Commerce

Dangerous Heat Wave in the West Expanding Eastward; Severe Weather in the Northern Plains and Upper Midwest

Dangerous and record-breaking heat will continue for much of the West through Saturday, and expand over central and eastern portions of the country through this weekend. Locally heavy rainfall and flash flooding will continue along the coastal Mid-Atlantic and in the Four Corners region. Strong to severe thunderstorms are possible across portions of the Northern Plains and Upper Midwest. Read More >

 

Environment
 

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. The derecho resulted in $11.5B worth of damage, making it the COSTLIEST known thunderstorm event in modern U.S. history. Peak wind gusts topped 140 mph in Cedar Rapids, Iowa, and at least 26 tornadoes were spawned by the storm. 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. Numerous injuries were counted after the storm, and four people lost their lives. 

 

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. The derecho stands as one of the most impactful weather events to ever impact the NWS Chicago County Warning Area. Additionally, as of 2021, August 10, 2020 is tied with June 22, 2016 as the single calendar day with the 2nd most tornadoes within the NWS Chicago County Warning Area behind the 6/30/2014 "Double Derecho" event. 

 

August 10, 2020, Midwest Derecho Story Map

 

nws logo Media use of NWS Web News Stories is encouraged!
Please acknowledge the NWS as the source of any news information accessed from this site.


Additional recaps can be found on the NWS Chicago Past Events Page
nws logo