A severe weather outbreak should get going in the next few hours. Conditions are highly favorable for large tornados (see map) and damaging winds, with a smaller hail threat. The orange outline shows the highest risk of severe weather, especially damaging winds. The tornado outline shows the highest probability of a tornado, the damaging wind threat is also prevalent here.
A strong upper level jet will continue to follow a cold front behind a strengthening surface cyclone. A line of storms will develop in western wisconsin and central Iowa, and push east throughout the later afternoon and evening. While this may help the harsh drought in some areas, these storms can be dangerous and local forecasts and warnings should be monitored. Keep it here to midwest weather talk
EDIT 7:55 central time... severe threat not as high, but still prevalent: