I've been watching this setup for the past few days, and the models continue to indicate strong warm air advection via a low moving through MN. Temperatures forecast to breach 70 with dewpoints approaching 65 acorss central IL into IN. SPC mentioned the cap being an issue, especially on the GFS. However, the nam indicates a relatively little cinh over the main instability axis. Cape is actually forecast to exceed 2000 JKg in eastern IL by 21z with speed shear over 50 knots. Directional shear looks adequate with a nice veering from the surface to 850mb, and 1km SRH values over 150 on the IN border. Saturday could turn out to be a nice chase setup, and a good first run for us midwest chasers.