Rivers in South Dakota
Big Sioux River near Jefferson
Below flood stage
9.59ftStage
Observed Tue, Sep 22, 3:30 PM CDT
- Flood stage
- 31.00 ft
- Record crest
- 44.50 ft2024
Flood stages and impacts
| Category | Stage |
|---|---|
| Major flood | 40.00 ft |
| Moderate flood | 35.00 ft |
| Minor flood | 31.00 ft |
| Action | 28.00 ft |
- 42.00 ftThe lowest portions of Hwy 12 may begin to flood.
- 40.50 ftAt least a couple farmsteads begin to flood.
- 37.00 ftWater begins to surround some farmsteads near 329th.
- 35.00 ftThe lowest portions of 329th are flooded and the floodplain on the South Dakota side is over a mile wide in some areas.
- 31.00 ftSignificant flooding of crop and pasture land begins.
Crest history
12 crests on NOAA’s list since 2015.
| # | Date | Stage |
|---|---|---|
| 1 | June 24, 2024 | 44.50 ft |
| 2 | March 17, 2019 | 40.42 ft |
| 3 | June 26, 2018 | 38.40 ft |
| 4 | September 18, 2019 | 36.74 ft |
| 5 | April 1, 2020 | 24.55 ft |
| 6 | May 4, 2016 | 24.04 ft |
| 7 | April 15, 2023 | 22.39 ft |
| 8 | May 24, 2017 | 20.92 ft |
| 9 | June 10, 2015 | 17.78 ft |
| 10 | June 2, 2022 | 17.57 ft |
| 11 | July 8, 2025 | 15.40 ft |
| 12 | August 31, 2021 | 14.48 ft |
Most recent crests
- July 8, 2025: 15.40 ft
- June 24, 2024: 44.50 ft
- April 15, 2023: 22.39 ft
- June 2, 2022: 17.57 ft
- August 31, 2021: 14.48 ft
- April 1, 2020: 24.55 ft
- September 18, 2019: 36.74 ft
- March 17, 2019: 40.42 ft
- June 26, 2018: 38.40 ft
- May 24, 2017: 20.92 ft
Nearby
Upstream, downstream and the gauges around this one.
What this means
Forecasts by the Missouri Basin River Forecast Center. Forecasts are not available. Only observed stages are available for this point. No forecasts are available for this location Gauge reading may be affected by ice.
Sources
Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.