 with runoff in the Fort Peck to Oahe reaches being approximately 50 to 90 percent of average. Kevin Lau is a meteorologist with the Weather Service's Missouri River Basin Forecast Center in Kansas City. Lau says part of that increased runoff forecast was due to torrential rains in late June with some areas south of Sioux Falls, South Dakota, reporting three-day rainfall amounts exceeding 17 inches. He adds the Weather Service's Hydro-Meteorological Design Study Center conducted an analysis of the event.