Drought conditions continue to persist across the area. The updated Spring Flood Outlook shows below normal chances of flooding across nearly all of southeastern SD, southwestern MN, northwestern IA, and northeastern NE. Most locations are showing probabilities of reaching flood stage this spring that are 20 to 30 percent lower than normal. The only area with normal to above normal chances for hitting flood stage is the Big Sioux River in Brookings and Moody counties. The increased flood chances in that area is due to the heavier snows that have fallen across northeastern SD in the past 4 to 8 weeks, along with deep frost in the soils that will lead to more runoff from the snowmelt and less infiltration. All areas have below normal chances for moderate or major flooding.
Images showing the chances for minor, moderate, and major flooding across the entire Missouri River basin can be found at http://www.crh.noaa.gov/mbrfc/?n=new_outlook.
For more information, please see the NWS AHPS pages at http://water.weather.gov/ahps2/index.php?wfo=fsd.