A slow moving low pressure center will bring the potential for severe thunderstorms to the Plains and Upper Midwest the next few days. For today, the slight risk area is focused from the Black Hills to near Cheyenne, Wyoming. A marginal risk extends through the Plains from the Canadian Border to the Mexican Border. Isolated thunderstorms will be ongoing from midday into the afternoon across the High Plains. As a trough / dry line develops in the late afternoon, severe thunderstorms will likely form along and ahead of it. The storms will move east into the evening across South Dakota and Nebraska, diminishing in intensity during the overnight. For Thursday and Friday, south and southwesterly winds will push heat and humidity northward into the Upper Midwest. This will help to fuel severe thunderstorms as the low pressure center and cold front moves eastward. For WeatherNation: Meteorologist Mace Michaels