Overnight storms?

A severe thunderstorm watch is in effect just to our south. Thunderstorms have rapidly developed over Iowa in the past hour, and several severe thunderstorm warnings are already in effect. These storms could move north into Wisconsin overnight. Heavy rain and large hail would be the main threats.

Side note: You know it is April when a severe thunderstorm watch is in effect for southern Wisconsin, while a winter storm warning is in place across the north.