Strong thunderstorms are moving through the Chicago area Saturday evening, prompting a severe thunderstorm warning across the western and southern suburbs, the National Weather Service said.

Aurora, Bolingbrook, Joliet and Chicago Heights, could see up to 70 mph wind gusts and small hail, the weather service said.

Strong to severe thunderstorms continue across the west and southwest suburbs of Chicago, and into NW Indiana. Additional storms will move into far northern Illinois this evening. pic.twitter.com/DKAKtkOmQk

— NWS Chicago (@NWSChicago) August 16, 2025

A severe thunderstorm watch was in effect through 7 p.m. for Cook County and the surrounding northern counties, the weather service said.

The severe weather also triggered a special marine warning for watercraft on Lake Michigan

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