Damaging Winds, Torrential Rainfall Possible: Chicago Weather

CHICAGO, IL — A severe thunderstorm watch has been issued for the northern half of Illinois. According to the National Weather Service in Chicago, the watch is in effect until 12 a.m. Saturday for Boone, Bureau, Carroll, Cook, DeKalb, DuPage, Ford, Grundy, Henderson, Henry, Iroquois, Jo Daviess, Kane, Kankakee, Kendall, Knox, Lake, La Salle, Lee, Livingston, Marshall, McHenry, Mercer, Ogle, Peoria, Putnam, Rock Island, Stark, Stephenson, Warren, Whiteside, Will, Winnebago and Woodford counties.

A severe thunderstorm watch has been issued for parts of IL, IN, IA, MI, WI until 12 AM CDT pic.twitter.com/ujWl9Ap2yB
— NWS Chicago (@NWSChicago) July 21, 2017

According to the NWS, the main threat will be damaging winds up to 70 mph, with torrential rainfall and flooding possible.

Details and timing on the expected thunderstorms late this afternoon, this evening, and the overnight hours. #ilwx #inwx pic.twitter.com/1hqsgT1Spm
— NWS Chicago (@NWSChicago) July 21, 2017