Chicago Severe Weather July 12, 2023 7:26 pm Watch: Tornado forms over O'Hare Airport live during NBC Chicago coverage The threat of severe weather, including tornadoes and flash flooding, is rising on Wednesday afternoon, according to the National Weather Service. Local 1:58 The Blue Man Group wraps up Chicago residency with final performance 1:52 Lake-effect snow expected in part of Chicago area 0:26 Illinois father shot and killed in Mexico while visiting family for the holidays 1:43 Extreme cold moves into the Chicago area 2:09 Bally's Chicago hosts job fair in search for table dealers