Model output shows the storms weakening as they move into Illinois, but how quickly that happens is still a question with this system. Right now there is a slight risk for severe storms over northern Illinois. Ample shear and CAPE over the Stateline support the threat for strong to severe storms with damaging winds and heavy rain.
The forecast can still shift and change, but Thursday evening will be a time period to make sure you have a way to receive watches and warnings if they are issued. We will continue to update you as we continue to forecast.