National Weather Service United States Department of Commerce

A strong low pressure system will move through the area on Wednesday, bringing widespread showers and thunderstorms throughout the day. Some of these storms could be strong to severe, especially in the afternoon, especially in Illinois. Primary threats will be hail, damaging winds, and heavy rainfall with a few tornadoes possible.
Multiple rounds of storms are expected Wednesday bringing severe weather to the region.
Several rounds of storms are expected Wednesday and those that see multiple rounds could bring a risk of flash flooding.
Severe storms are possible Wednesday. Here are some safety tips to prepare ahead of the storms.