National Weather Service crews are heading out to survey storm damage across Illinois.
Meteorologists say a tornado that touched down in southern Illinois near New Minden had a preliminary strength rating of an EF-4. That means it had winds between 166 and 200 miles per hour. The Washington County community is about 45 miles southeast of St. Louis.
In northern Illinois, forecasters say a tornado touched down in Coal City, about 50 miles southwest of Chicago. Preliminary results show it had winds gusting between 111 and 135 miles per hour, making it an EF-2.
More National Weather Service survey crews headed out Monday to review damage near Peoria as well as Champaign and Vermilion counties.
The storm system spawned dozens of tornadoes across the Midwest, killing at least six.
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