National Weather Service United States Department of Commerce

Strong to severe thunderstorms are anticipated to develop tomorrow afternoon and last into the evening while a sharp cold front drops through the area. Primary concerns with storms are very large hail and damaging wind gusts, although a few tornadoes can't be ruled out, mainly south of a Streator to Rensselaer line.
Showers and storms are expected along and behind a passing cold front tomorrow afternoon and evening. Some of the storms may be strong to even severe.
A cold front will quickly move southward across the area tomorrow. Temperatures will drop rapidly, potentially by over degrees in about an hour. #ILwx #INwx
Warmer conditions are expected on Thursday before a powerful cold front races through the area in the afternoon and evening. Thunderstorms, possibly severe, are expected with this frontal passage.