RAPID CITY, S.D. (NWS/KOTA TV) - The Rapid City National Weather Service office has issued the first spring flood outlook for western South Dakota and northeastern Wyoming.
At this time, the probability of spring flooding from March through June is above average in the White River basin due to saturated soil conditions and above average precipitation over the winter.
The probability of spring flooding is at or below average for other river basins in the area; The Grand, Moreau, Bad, Cheyenne, Little Missouri, and Belle Fourche River basins.
For the Black Hills and higher elevations, flooding from snowmelt typically begins in late April and May. Flooding on the plains due to snowmelt and ice jams typically occurs between February and May.
The flood potential is still very dependent on weather conditions from now until the spring melt. The amount of additional snow and rain, the timing and rate of the spring thaw, and the timing of peak flows will have a significant effect on the flooding.
The outlook will be updated March 2.