The risk for severe thunderstorms expands into the Upper Midwest and Northern Plains on Tuesday as a storm system slides slowly to the southeast. There is a slight risk for large hail, damaging wind, and isolated tornadoes from the Black Hills of South Dakota into Northern Nebraska. A marginal risk covers most of the rest of the region. A low pressure center moving through North Dakota will fire a first round of shower and storms in the early morning hours. Strong wind gusts are possible with this wave of storms as it races eastward through the Dakotas. A second round will fire in the later afternoon and evening in the Black Hills and along the Missouri River. Large hail, damaging winds, and isolated tornadoes will all be possible. As a cold front pushes to the east on Wednesday, more severe thunderstorms will be possible in the Great Lakes. A slight risk for severe weather has been outlined from the Storm Prediction Center from Lake Superior to St. Louis. For WeatherNation: Meteorologist Mace Michaels