Chicago, Illinois – Drivers across northern Illinois could face rapidly deteriorating road conditions by 3 p.m. Thursday as fast-moving thunderstorms begin sweeping east at 40 to 50 mph, threatening major corridors including I-55, I-80, and I-94 through the evening commute.
According to the National Weather Service in Chicago, scattered storms will develop Thursday afternoon, with the highest risk for severe weather concentrated between 3 p.m. and 9 p.m., especially along and south of the I-80 corridor. Forecasters warn that some storms may produce hail exceeding 2 inches in diameter and wind gusts strong enough to down tree limbs and power lines.
Cities including Joliet, Kankakee, Bloomington, and Champaign sit in the highest impact zone, while Chicago, Rockford, and Milwaukee remain under a lower but still active threat. The timing aligns with peak travel hours, increasing the risk of sudden visibility drops and debris on roadways.
Residents should secure outdoor items, charge devices, and avoid unnecessary travel during peak storm hours. If warnings are issued, move indoors immediately and stay away from windows.
Storm intensity may shift depending on the speed of an approaching cold front, but additional alerts remain possible through Thursday night.
