National Weather Service United States Department of Commerce

Showers and storms will develop once again tonight as a warm front moves northward. Some storm may be strong to severe, though the threat for severe storms should diminish after midnight. Instances of flash flooding will be possible. Showers are expected to continue through daybreak tomorrow. #ILwx #INwx
Here is a look at expected rain trends through tonight. The highest chances for thunderstorms through late this evening will be near and south of I-80 (along with the main severe and flooding threat). Storms will expand across most of the area overnight.
Another round of thunderstorms, some of which could be strong to severe with heavy rain, will develop this evening and overnight. A cold front will bring drier conditions to the area Saturday afternoon into next week.
There is an increasing threat for flash flooding tonight as waves of torrential rain falls over saturated ground. The most widespread and heaviest rainfall is expected from about 10 PM to 4 AM CDT. Have multiple ways to receive weather warnings and NEVER drive through flooded roadways if you encounter one!