The Flood Warning is extended for the following rivers in South Dakota. Big Sioux River below Dell Rapids affecting Minnehaha County. . The Flood Warning continues for the following rivers in South Dakota. Iowa. Big Sioux River near Brookings affecting Moody and Brookings Counties. Big Sioux River above Hawarden affecting Lincoln, Sioux and Union Counties. Big Sioux River near Trent affecting Moody County. Big Sioux River near Egan affecting Moody County. Big Sioux River near Jefferson affecting Plymouth and Union Counties. Big Sioux River near Richland affecting Plymouth and Union Counties. Big Sioux River at Sioux Falls I-90 affecting Minnehaha County. Big Sioux River at Brandon affecting Lincoln, Minnehaha and Lyon Counties. Big Sioux River at Akron affecting Plymouth and Union Counties. Big Sioux River near Canton affecting Lincoln, Sioux and Lyon Counties. Spirit Lake near Orleans affecting Dickinson County. West Okoboji Lake near Milford affecting Dickinson County. Little Sioux River near Correctionville affecting Cherokee, Ida and Woodbury Counties. Waterman Creek near Sutherland affecting O'Brien County. Little Sioux River at Cherokee affecting Cherokee County. Little Sioux River near Montgomery affecting Dickinson County. Little Sioux River At Linn Grove affecting Cherokee, O'Brien, Clay and Buena Vista Counties. Ocheyedan River near Spencer affecting Clay County. Little Sioux River at Spencer affecting Clay County. Little Sioux River near Milford affecting Dickinson County. Little Sioux River above Spencer / Highway 18 affecting Clay County. * WHAT. Minor flooding is occurring and minor flooding is forecast. * WHERE. Big Sioux River above Hawarden. * WHEN. Until Friday afternoon. * IMPACTS. At 24.0 feet, Some farm houses on the South Dakota side of the river are isolated by high water. * ADDITIONAL DETAILS. - At 7:30 PM CDT Saturday the stage was 24.0 feet. - Recent Activity. The maximum river stage in the 24 hours ending at 7:30 PM CDT Saturday was 24.4 feet. - Forecast. The river is expected to fall below flood stage Thursday afternoon and continue falling to 20.4 feet Thursday evening. - Flood stage is 20.5 feet. - http://www.weather.gov/safety/flood