Big Sioux River at Lake Kampeska, SD
River level and flood forecast · Codington County
Normal18.5 ftas of Mon 2:15 PM
The river is 2.5 ft below flood stage (21 ft).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 6 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 24 ft |
| Moderate flood stage | 22 ft |
| Flood stage | 21 ft |
| Action stage | 20 ft |
| Record crest (March 15, 2010) | 22.4 ft |
What floods at each level
From the National Weather Service, highest first.
- 24 ftSignficant amounts of crop and pasture land will be flooded
- 22 ftPasture land begins to flood
- 21 ftThe low water crossing on 167th Street is flooded
Highest crests on record
- 22.4 ft — March 15, 2010
- 21.97 ft — April 13, 2023
- 21.82 ft — March 28, 2019
- 21.6 ft — April 8, 2011
- 20.77 ft — April 22, 2018
Recent crests: 20.63 ft (August 7, 2025) · 21.97 ft (April 13, 2023) · 20.22 ft (October 23, 2019) · 21.82 ft (March 28, 2019) · 20.77 ft (April 22, 2018)
Up and down the river, and nearby
- UpstreamBig Sioux River near Watertown, SD
- DownstreamBig Sioux River at Watertown Sioux Conifer Road, SD
- Lake Kampeska at Watertown Water Plant, SD
- South Branch Tributary Mud Creek near Rauville, SD
- Big Sioux River at Watertown Broadway Avenue, SD
- Mud Creek near Rauville, SD
- Willow Creek near Watertown, SD
- Big Sioux River below Watertown, SD
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (KAMS2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.