Little Missouri River at Marmarth, ND
River level and flood forecast · Slope County
Normal0.8 ftas of Mon 1 PM
The river is 17.2 ft below flood stage (18 ft).
Flow: 12 cubic feet per second (USGS).
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 | 23 ft |
| Flood stage | 18 ft |
| Action stage | 16 ft |
| Record crest (March 23, 1947) | 21.7 ft |
What floods at each level
From the National Weather Service, highest first.
- 30 ftCity of Marmarth will flood due to dike being overtopped at this height.
- 18 ftFlooding confined to grasslands used by ranchers in the area.
Highest crests on record
- 21.7 ft — March 23, 1947
- 21.5 ft — March 1, 1913
- 21.11 ft — May 23, 2011
- 20.2 ft — May 1, 1929
- 19.7 ft — March 1, 1920
Recent crests: 2.48 ft (February 27, 2021) · 8.97 ft (March 8, 2020) · 16.54 ft (March 24, 2019) · 12.42 ft (April 15, 2018) · 7.25 ft (February 21, 2017)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (MTHN8); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.