Severe thunderstorms are expected from the Plains into the Upper Midwest and Great Lakes, with the highest risk being in southern Minnesota and Wisconsin. The active storm pattern is expected to continue into Tuesday across the Midwest, Plains, and parts of the Northeast. The highest-impact weather is expected from southern Minnesota to Wisconsin, where storms could quickly become strong supercells capable of producing large hail, damaging winds, and tornadoes. The main hazards include very large hail up to 2 to 3 inches in diameter, damaging straight-line wind gusts, and a few tornadoes near a stalled frontal boundary. Additional severe thunderstorms will be expected across the mid-western U.S.