While all of their findings were preliminary, the National Weather Service estimated at least seven tornadoes touched down west of the city of Chicago on Monday evening. Officials said that EF-1 tornadoes touched down in McHenry, Sycamore, and Burlington on Monday afternoon and into the evening hours.
Tornado damage was also reported in communities such as Creston, Malta, DeKalb, Cortland, Maple Park, and others.
Two more tornadoes touched down to the north and to the south of the town of Esmond. Both tornadoes were classified as EF-0 on the Enhanced Fujita Scale.
A tornado with an EF-0 rating is estimated to have three-second wind gusts of 65 to 85 miles per hour, while a tornado with an EF-1 rating is estimated to have three-second gusts of 86 to 110 miles per hour.
An additional two more twisters, classified as EF-U, touched down to the south of Kirkland and in the town of Paw Paw.
The “EF-U” designation is used when a tornado doesn’t produce damage that can be used to determine its wind speed, according to NWS officials.
Below are the best images and videos we found on social media during the weather event.
While there was some property damage, luckily, no one was hurt.
I got up close to this #tornado as the condensation funnel became very laminar. There was still small debris flying around as it moved East ahead of me. #Sycamore, #Illinois. 8/9/21. #ilwx @StormHour @SimonStormRider @ReedTimmerAccu @MikeOlbinski pic.twitter.com/w5VkFhaYr1— Melanie Metz Storm Chasing (@MetzStormMedia) August 10, 2021
#Tornado on the Eastern edge of #Sycamore, #Illinois today at 6:15pm. Unfortunately it hit a structure. Hopefully there were no injuries. 8/9/21 #ilwx @stormhour @NWSChicago @NWSSPC pic.twitter.com/VgPaMmQMGa— Melanie Metz Storm Chasing (@MetzStormMedia) August 10, 2021
New tornado northeast of Maple Park, IL moments ago. Just lifted. pic.twitter.com/TOhNNZqiwx— Victo☈ Gensini (@gensiniwx) August 9, 2021
That was the most beautiful tornado I’ve seen in my life I documented the whole thing from life to death for about 20 minutes, and was about 50 to 100 yards away from it the entire time #ilwx #wxtwitter pic.twitter.com/tSM0eovdMv— Kannon Kalton (@WeatherKannon) August 9, 2021
Tornado near Virgil, IL at 6pm. Crazy day!— ConnorWx (@connor_wx) August 10, 2021
***DM for licensing*** pic.twitter.com/XvbVwrvdn4
Intense outbreak of tornadoes in Northeast IL this afternoon and evening. I lost count. My #2 chase day of all time. Each is a different tornado. Some of these looked very powerful with horizontal vortices #ilwx pic.twitter.com/u05TI0CduO— Ethan Schisler (@StormOptics) August 10, 2021
Beautiful tornado near Creston, IL around an hour ago. pic.twitter.com/WaQMMD79gE— ConnorWx (@connor_wx) August 10, 2021