National Weather Service United States Department of Commerce


Fast Facts:  Thunderstorms brought torrential rain, flash flooding, hail and damaging winds to northern Illinois Friday afternoon and evening. Radar estimates and surface rainfall measurements indicate a swath of 3-8" of rain fell roughly along the I-80 corridor.

  • Heaviest Rainfall amounts included: 8.03 at Channahon, 7.87 inches at Peotone, 7.61 inches at Seneca, 7.53 at Morris, and 7.52 inches at Valparaiso  
  • Chicago O'Hare Daily Rainfall record set: 2.28 inches


Observed Rainfall - 24 hour period ending 10 am Saturday September 28

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