Big Sioux River near Jefferson
Future / Actual / Minor
OWP 2.0 WWA Modal Title
01/11/2021, 10:04 PM UTC through 01/11/2021, 10:04 PM UTC
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Observed (OBS) 06/11/2025 10:30 AM CDTRecord: 44.5 ftCATEGORY STAGE 
Major Flooding 40 ft Moderate Flooding 35 ft Minor Flooding 31 ft Action 28 ft Reliability of the Forecast:
NOTE: Forecasts are not available. Only observed stages are available for this point.
No forecasts are available for this location
National Water Model Hydrograph
Official NWS streamflow forecasts are produced by NWS hydrologic forecasters for river gauge locations using hydrologic models which are calibrated to that location. This process considers additional guidance and information, including local expertise and experience, to produce the best forecast possible. The NWM output provides supplemental guidance to NWS forecasters and should not be considered an official NWS river forecast.
Flood Impacts
- 42 - The lowest portions of Hwy 12 may begin to flood.
- 40.5 - At least a couple farmsteads begin to flood.
- 37 - Water begins to surround some farmsteads near 329th.
- 35 - The lowest portions of 329th are flooded and the floodplain on the South Dakota side is over a mile wide in some areas.
- 31 - Significant flooding of crop and pasture land begins.
Gauge Location
Recent Crests
| 1. | 44.50 ft | on 06-24-2024 |
| 2. | 22.39 ft | on 04-15-2023 |
| 3. | 17.57 ft | on 06-02-2022 |
| 4. | 14.48 ft | on 08-31-2021 |
| 5. | 24.55 ft | on 04-01-2020 |
Recent Crests
| 1. | 44.50 ft | on 06-24-2024 | |
| 2. | 22.39 ft | on 04-15-2023 | |
| 3. | 17.57 ft | on 06-02-2022 | |
| 4. | 14.48 ft | on 08-31-2021 | |
| 5. | 24.55 ft | on 04-01-2020 | |
| 6. | 36.74 ft | on 09-18-2019 | |
| 7. | 40.42 ft | on 03-17-2019 | |
| 8. | 38.40 ft | on 06-26-2018 | |
| 9. | 20.92 ft | on 05-24-2017 | |
| 10. | 24.04 ft | on 05-04-2016 | |
| 11. | 17.78 ft | on 06-10-2015 | 1 |
Historic Crests
| 1. | 44.50 ft | on 06-24-2024 |
| 2. | 40.42 ft | on 03-17-2019 |
| 3. | 38.40 ft | on 06-26-2018 |
| 4. | 36.74 ft | on 09-18-2019 |
| 5. | 24.55 ft | on 04-01-2020 |
Historic Crests
| 1. | 44.50 ft | on 06-24-2024 | |
| 2. | 40.42 ft | on 03-17-2019 | |
| 3. | 38.40 ft | on 06-26-2018 | |
| 4. | 36.74 ft | on 09-18-2019 | |
| 5. | 24.55 ft | on 04-01-2020 | |
| 6. | 24.04 ft | on 05-04-2016 | |
| 7. | 22.39 ft | on 04-15-2023 | |
| 8. | 20.92 ft | on 05-24-2017 | |
| 9. | 17.78 ft | on 06-10-2015 | 1 |
| 10. | 17.57 ft | on 06-02-2022 | |
| 11. | 14.48 ft | on 08-31-2021 |
Vertical Datum Table
| type | NAVD88 |
|---|---|
| major Flooding | 1110.00 ft |
| moderate Flooding | 1105.00 ft |
| minor Flooding | 1101.00 ft |
| action | 1098.00 ft |
| Latest Value | 1079.84 ft |
| Gauge Zero | 1070.00 ft |
Probability Information
No Images Available
Collaborative Agencies
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
Resources
Hydrologic Resource Links
- River Forecast Centers
- NWS Sioux Falls Flooding Resource Page
- NOHRSC Snow Information
- USACE Missouri River Water Management
- USGS National Water Dashboard
- FEMA Flood Insurance Information
- South Dakota Flood Information System
- Iowa Flood Information System
- Missouri River Flood Information System
- Minnesota DNR
- Nebraska Real-Time Flood Forecasting
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