Major Flood
36 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
33 ft
Minor Flood
30 ft
Action Stage
25 ft
What Floods at Each Level
39 ft
Water reaches portions of 4th St in South Sioux City near the gauge location under the Hwy 20 bridge.
36 ft
Extensive urban flooding in lower lying portions of Sioux City begins.
35 ft
The levee protecting various structures in parks and memorials on the Iowa side of the river is overtopped.
33 ft
Additional recreational areas and some pasture land along the river begin to flood.
32 ft
Hamilton Blvd under I-29 is flooded.
31 ft
The baseball fields at Scenic Park are flooded.
30 ft
Some of the boat docks and marinas along the river begin to flood. The levee at the Scenic Park campground is overtopped and flooding may impact the parking lot at the Lewis and Clark Interpretive Center if the levee is breached.
29 ft
The parking lots of baseball fields at Scenic Park begin to flood on the Nebraska side of the river. The lowest portions near the Lewis and Clark Interpretive Center and Flight 232 Memorial begin to flood.
25 ft
Lower Scenic Park campground in South Sioux City may begin to be affected by flooding.
4 ft
The power and industrial plants around Sioux City may begin to encounter challenges as the water levels fall below what is needed for the cooling intake valves.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Jul 20, 2011 | 35.25 ft | 192,000 cfs |
| Jun 23, 2024 | 32.23 ft | 172,000 cfs |
| Jun 24, 1984 | 30.77 ft | 103,000 cfs |
About This Gauge
Get Flood Alerts for Missouri River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Missouri River at Sioux City?
The Missouri River at Sioux City gauge is maintained by USGS (site 06486000) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Missouri River at Sioux City?
The NWS-defined flood stage for Missouri River at Sioux City is 30 feet. Action stage begins at 25 feet. Moderate flooding starts at 33 feet, and major flooding at 36 feet.
How do I get alerts when Missouri River rises?
Download StormCast free on Google Play, go to River Gauges, and add Missouri River at Sioux City to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Missouri River at Sioux City gauge located?
The gauge is located in Dakota County, Nebraska at coordinates 42.4858°N, 96.4136°W. USGS site number: 06486000. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: Observations courtesy of U.S. Geological Survey, Observations courtesy of U.S. Army Corps of Engineers
- River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 48 hours into the future from the forecast issuance time.
- River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.
- Gauge reading affected by reservoir operations.