Tornadoes Moved Quickly Across Chicago's South SuburbsThe National Weather Service reported the radar-confirmed tornado near Homewood-Flossmoor at about 10:55 a.m. CDT, with the storm moving rapidly eastward. That rating remains preliminary unless confirmed by a post-storm National Weather Service survey. ABC7 Chicago reported tornado warnings affecting portions of Illinois and Indiana during the morning, while tornado sirens were heard in Chicago and surrounding suburbs. The National Weather Service identified destructive wind gusts as the primary broader threat, with ABC7 Chicago reporting that gusts could reach 80 mph. ABC7 Chicago reported about 250 cancellations at O'Hare around 11:30 a.m., along with delays of roughly an hour at both airports.