 It says the 2024 calendar year runoff forecast for the Missouri River Basin above Sioux City has increased to 24.6 million acre feet, or 96% of average. The 2024 calendar year forecast reflects current improved soil moisture conditions in eastern portions of the basin, current higher than normal stream flow, and the Climate Prediction Centers, or CPC, outlook. Observed June runoff above Sioux City, Iowa was approximately 120% of average.