Severe thunderstorms will impact areas from the central High Plains to the Ohio Valley Saturday night and Sunday with large hail, damaging wind and torrential rainfall.
A line of thunderstorms brought heavy rainfall to parts of southern Illinois earlier Saturday. Radar estimations between 2 and 5 inches of rain may have fallen in this region with the hardest hit area around Carbondale.
More thunderstorms are expected to develop Saturday night throughout southern Illinois northwestward into the central High Plains. The greatest threat for strong thunderstorms will begin Saturday evening in this area where daytime heating destabilized the atmosphere. These thunderstorms will move southeastward into southern Missouri during the overnight and into Sunday morning.
More thunderstorms will develop again Sunday afternoon in the central Plains Sunday. Some of these thunderstorms could become severe. These thunderstorms will move southeastward once again during the evening and reach the mid-Mississippi Valley later Sunday night.
Meanwhile, conditions will be somewhat better throughout the Upper Midwest Sunday. There may be a strong storm in Iowa, but for the most part, thunderstorms will be weaker in Minnesota and Wisconsin. In fact, the 50th anniversary celebration of the Art Fair on the Square in Madison, Wis., should predominately stay dry. There may be an afternoon shower or thunderstorm, but the last day of the festival should turn out nice. Over 200,000 people are expected to attend the festival, which started Saturday.