Moreau River (SD) at Promise, SD
River level and flood forecast · Dewey County
Normal5.7 ftas of Mon 2:30 PM
The river is 15.3 ft below flood stage (21 ft).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 5 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 30 ft |
| Moderate flood stage | 26 ft |
| Flood stage | 21 ft |
| Action stage | 18 ft |
What floods at each level
From the National Weather Service, highest first.
- 38 ftStructures south of Promise Rd are in danger of flooding.
- 30 ftThe bridge at the gauge location on BIA-7 is overtopped.
- 28 ftWater reaches the bottom of the bridge at the gauge location on BIA-7.
- 26 ftThe nearby higher ridges begin to be overtopped which may begin to threaten some lower lying roads.
- 24 ftMost of the floodplain is underwater.
- 21 ftThe higher banks are overtopped and water enters the broader floodplain. Flooding possible along Promise Rd at bridge on Virgin Creek south of Moreau River.
- 18 ftThe lowest banks are overtopped and some ditches begin to fill.
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (MRPS2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.