The weather service issued a hazardous weather outlook for Winnebago, Boone, McHenry, Lake, Ogle, Lee, DeKalb, Kane, DuPage, La Salle, Kendall, Grundy, Kankakee, Livingston, Iroquois, Ford, Cook and Will counties.
The National Weather Service is forecasting severe storms beginning later Friday afternoon through the evening.
Residents need to brace for possible damaging winds and hail. A brief tornado can’t be ruled out, according to the NWS.
Torrential downpours also may cause pockets of street flooding.
The stormy weather pattern will continue into the weekend, followed by a cooler and drier start to next week, according to the NWS. There may be scattered strong thunderstorms on Saturday.