A Tornado Watch for several Chicago-area counties expired at around 11:30 p.m. Saturday.
The watch, which included Grundy, Kane, Kendall, Will, Kankakee, DeKalb and LaSalle counties, was set to be in effect until 2 a.m. Sunday, but was ultimately canceled early.
The threat for severe weather started at around 5 p.m. and is likely to continue until midnight Saturday. The National Weather Service warns that some areas could see large hail, strong gusty winds and possibly isolated tornadoes.
A tornado was reported in the town of Oregon, but it wasn't immediately clear if there was any damage.