Big Sioux River near Richland
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) 06/14/2025 10:00 PM CDTRecord: 1128.7 ftCATEGORY STAGE 
Major Flooding 1123 ft Moderate Flooding 1119 ft Minor Flooding 1117 ft Action 1116 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
- 1124.5 - South Dakota Highway 50 begins flooding.
- 1123.5 - Iowa Highway 3 begins flooding.
- 1121 - Some farm levees will be overtopped and some farm buildings will be flooded.
- 1119 - Widespread flooding of crop and pasture land begins.
- 1117 - Lower pasture lands begin to flood, and the Millsite Access is flooded.
Gauge Info
| Coordinates | 42.7617, -96.6326 |
| RFC | MBRFC |
| State | SD |
| WFO | FSD |
| County | Union |
| Data Provider(s) | |
| South Dakota DANR | Observations courtesy of South Dakota DANR |
Gauge Location
Recent Crests
| 1. | 1128.70 ft | on 06-23-2024 |
| 2. | 1118.36 ft | on 04-15-2023 |
| 3. | 1118.67 ft | on 04-01-2020 |
| 4. | 1123.51 ft | on 09-17-2019 |
| 5. | 1124.50 ft | on 03-16-2019 |
Recent Crests
| 1. | 1128.70 ft | on 06-23-2024 |
| 2. | 1118.36 ft | on 04-15-2023 |
| 3. | 1118.67 ft | on 04-01-2020 |
| 4. | 1123.51 ft | on 09-17-2019 |
| 5. | 1124.50 ft | on 03-16-2019 |
| 6. | 1124.40 ft | on 06-24-2018 |
| 7. | 1118.80 ft | on 04-01-2018 |
| 8. | 1125.63 ft | on 06-18-2014 |
Historic Crests
| 1. | 1128.70 ft | on 06-23-2024 |
| 2. | 1125.63 ft | on 06-18-2014 |
| 3. | 1124.50 ft | on 03-16-2019 |
| 4. | 1124.40 ft | on 06-24-2018 |
| 5. | 1123.51 ft | on 09-17-2019 |
Historic Crests
| 1. | 1128.70 ft | on 06-23-2024 |
| 2. | 1125.63 ft | on 06-18-2014 |
| 3. | 1124.50 ft | on 03-16-2019 |
| 4. | 1124.40 ft | on 06-24-2018 |
| 5. | 1123.51 ft | on 09-17-2019 |
| 6. | 1118.80 ft | on 04-01-2018 |
| 7. | 1118.67 ft | on 04-01-2020 |
| 8. | 1118.36 ft | on 04-15-2023 |
Vertical Datum Table
| type | NAVD88 |
|---|---|
| major Flooding | 1123.00 ft |
| moderate Flooding | 1119.00 ft |
| minor Flooding | 1117.00 ft |
| action | 1116.00 ft |
| Latest Value | 1107.02 ft |
| Gauge Zero | 0.00 ft |
Gauge Photos
No Images Found
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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