Strong storms are expected to move across the Chicago area Tuesday ahead of a major cool down that will turn summer temps into fall-like weather in a matter of 24 hours.
Thunderstorms started moving through the area shortly after noon Tuesday with a line of strong weather hitting southeastern LaSalle and Kane counties along with central Cook, northwestern Livingston, southern DuPage and Kendall and Grundy counties.
The storms were moving northeast at 40 mph, bringing with them wind gusts of up to 50 mph and torrential rainfall.
Airports in the Chicago area reported the cancellation of more than 150 flights Tuesday afternoon.
O'Hare International Airport said delays of more than 35 minutes were expected and 180 flights had been canceled. Midway Airport reported delays of more than 90 minutes, officials said.
Scattered storms have the potential to bring heavy rain until the early hours of Wednesday. Many locations could receive upwards of 1 to 2 inches of rainfall, bringing the chance for mild flooding.
Waves of showers and high winds will likely roll through in the late afternoon hours before weakening overnight as the storm system moves towards northwest Indiana.
The Chicago area will be at a marginal risk for severe storms throughout the day, with the greatest byproduct of the storms being the heavy rainfall.
Wednesday is expected to bring fall-like temps with sunshine and breezy, cooler, less humid conditions.