I gave my reasoning in my previous comment. the low pressure is set to track up this way. currently looks like it will through eastern iowa and into the great lakes. that will drag the warm front with it northward. yes the best shear, instability, and moisture will prolly line up south, there will most likely be some instability in this area and plenty of upper air dynamics. yes i know it is probabilistic. their outlooks just make it look like the severe weather will only track in the far southern US and i disagree with this