National Weather Service United States Department of Commerce


Fast Facts:

  • Numerous storms moved south through northern Illinois Tuesday evening, producing scattered downbursts of 35+ mph winds, and in isolated locations these reached to 50+ mph causing damage.
  • Downbursts are concentrated areas of rain and rain-cooled air from thunderstorms, and this more dense, cool air hits the grounds and rushes out, at times causing damage.
  • The thunderstorms also produced heavy rain resulting in localized flash flooding, including in parts of the Chicago and Rockford metro areas.   
Animation from College of DuPage webcam showing downburst.
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Additional recaps can be found on the NWS Chicago Past Events Page
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