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Fast Facts:

  • A potent storm system -- the second in a week's time to cross the nation's mid-section -- brought high winds to a large part of the western to central U.S., as well as a severe thunderstorm wind complex from Kansas through Iowa into Wisconsin. 
  • High winds in northern Illinois and northwest Indiana were not due to thunderstorms, and were as high as 69 mph at Aurora Airport in Sugar Grove, 68 mph in Waukegan, and 66 mph at Chicago (O'Hare) late on the evening of Wednesday, December 15. Most locations gusted between 55 and 65 mph.
  • There was scattered damage with these winds in the local area, namely in the form of branches or trees downed and powerlines impacted. There were tens of thousands of power outages reported across the region late Wednesday night, December 15.
  • Temperatures on Wednesday into Wednesday night were anomalously warm into the 60s, breaking record highs at Chicago and Rockford, and even tying the all time December high in Rockford of 69°.


Summary of December 15, 2021 weather impacts.

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