Both Minnesota and Wisconsin were hit by tornadoes during Monday night's severe storms, the National Weather Service confirmed.

Severe thunderstorms rolled across the central U.S. on Monday, producing damaging winds, large hailstones and at least one tornado. And the system is forecast to bring the same threats to more than 50 million Americans from Texas to New York on Tuesday.

Monday is probably the peak, but a storm risk shifts eastward Tuesday. Cities in the highest risk for tornadoes include Minneapolis and Rochester in Minnesota.