Across the Corn Belt, a record crest was established on Thursday along the Big Sioux River near Florence, South Dakota, topping a high-water mark set in April 1997. Moderate flooding is occurring on the Big Sioux River as far south as Brookings, South Dakota. Meanwhile, rain showers developing across the upper Midwest are contributing to runoff that has become heavy in recent days due to rapidly melting snow. In advance of an approaching cold front, unusually warm weather lingers across the central and eastern Corn Belt.
