Advanced Hydrologic Prediction Service: Sioux Falls: Missouri River at Sioux City

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Observations
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Over 200 USGS real-time streamgages used to support NWS river forecasts and warnings are at risk of being discontinued. Click here for more information from the USGS...
Weather Forecast Office Sioux Falls, SD	Missouri Basin River Forecast Center

Hydrograph

River at a Glance

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About this graph

Tabular Data

Datum: Not Available

Metadata

NOTE: 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.

NOTE: Gauge reading affected by reservoir operations.

NOTE: Forecasts for the Missouri River at Sioux City are issued routinely year-round.

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Upstream Gauge

Downstream Gauge

Flood Categories (in feet)

Major Flood Stage:	36
Moderate Flood Stage:	33
Flood Stage:	30
Action Stage:	27

Historical Crests
(1) 44.28 ft on 04/14/1952
(2) 38.72 ft on 04/10/1943
(3) 38.44 ft on 04/25/1950
(4) 35.72 ft on 04/10/1949
(5) 35.45 ft on 04/12/1944
Show More Historical Crests

Low Water Records
Currently none available.

	Legend Gauge Location	Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.

Flood Impacts & Photos

36	Extensive urban flooding in lower lying portions of Sioux City begins.
33	Some of the recreational areas and some pasture land along the river begin to flood.
30	Some of the boat docks and marinas along the river begin to flood. Hamilton Boulevard at exit 149 on Interstate 29 is flooded.
7	The power plants around Sioux City have problems as the water levels fall below what is needed for the cooling intake valves.
Photos (1) Upstream View (2) Downstream View

About This Location

Latitude: 42.485833° N, Longitude: 96.413611° W, Horizontal Datum: NAD83/WGS84

River Stage Reference Frame	Gauge Height	Flood Stage	Uses
NWS stage	0 ft	30 ft	Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum	Elevation (gauge height = 0)	Elevation (gauge height = flood stage)	Elevation information source
NAVD88	Not Available	Not Available	Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29	1056.98 ft	1086.98 ft	Older USGS topographic maps, NGVD29 benchmarks
MSL	Not Available	Not Available	Older USGS topographic maps, MSL benchmarks
Other	Not Available	Not Available

Other Data Sources:

Additional Information

All observed historical crests before 1971 were at a different zero datum. 20 feet has been added to those crests to adjust them to the current zero datum.

Resources

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.

NWS Information

National Weather Service
Sioux Falls Weather Forecast Office
26 Weather Lane
Sioux Falls, SD 57104-0198
(605) 330-4247
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Page last modified: 13-Mar-2013 6:33 PM

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Over 200 USGS real-time streamgages used to support NWS river forecasts and warnings are at risk of being discontinued. Click here for more information from the USGS...