The National Weather Service and Storm Prediction seem to be going toe-to-toe with commercial weather agencies.
That is why I am choosing this time to issue an official forecast.
It is possible a couple storms will develop ahead of the cold front. If they should develop, given the instability, they would quickly become strong to severe.
As the cold front moves through, the main tornado threat will shift to the Wisconsin/North IL area.
There will be damaging thunderstorms in those areas.
The threat should end by midnight, CDT.
A main factor will be sunshine, which gives out instability.
Right now, there is considerable weak cloud cover that went unpredicted by the NWS.
Overall, this system is very hard to forecast.