National Weather Service United States Department of Commerce


Several rounds of thunderstorms producing heavy rainfall occurred from the evening of August 31st through the early morning of September 2nd. The most significant rainfall amounts occurred the evening of September 1st through the early morning of September 2nd over far northern Illinois. Additional heavy rainfall is expected late Sunday afternoon through at least Monday morning, especially into portions of northwest and north central Illinois. Finally, there was a very isolated area of wind damage over parts of the far northwest side of Chicago during the Saturday morning thunderstorms.

Fast Facts

  • The 1.72" that fell on September 1st at Rockford Airport set a new daily precipitation record for the city of Rockford, breaking the previous record for September 1st of 1.33" in 1930 and 1945. 
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