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This probabilistic forecast is issued by the Missouri Basin River Forecast Center.
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About this graph
Forecasts for the Missouri River at Sioux City are issued routinely year-round.
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Downstream Gauge Downstream Gauge - at Decatur
Zoom Level:14
Flood Categories (in feet)
Major Flood Stage: 36
Moderate Flood Stage: 33
Flood Stage: 30
Action Stage: 25
Low Stage (in feet): -9999

Historic 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 Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 12.87 ft on 08/16/2022
(2) 18.12 ft on 04/01/2020
(3) 25.92 ft on 10/21/2019
(4) 30.27 ft on 06/01/2019
(5) 29.78 ft on 03/17/2019
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 2.97 ft on 01/02/2022
(2) 4.12 ft on 12/30/2013
(3) 6.93 ft on 01/19/1996
(4) 7.83 ft on 01/09/1989
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Gauge LocationGauge Map Marker
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 Collapse
If you notice any errors in the below information, please contact our Webmaster
39 Water reaches portions of 4th St in South Sioux City near the gauge location under the Hwy 20 bridge.
36 Extensive urban flooding in lower lying portions of Sioux City begins.
35 The levee protecting various structures in parks and memorials on the Iowa side of the river is overtopped.
33 Additional recreational areas and some pasture land along the river begin to flood.
31 The baseball fields at Scenic Park are flooded.
30 Some of the boat docks and marinas along the river begin to flood. The levee at the Scenic Park campground is overtopped at flooding may impact the parking lot at the Lewis and Clark Interpretive Center if the levee is breached.
29 The parking lot 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 Lower Scenic Park campground in South Sioux City may begin to be affected by flooding.
7 The power plants around Sioux City have problems as the water levels fall below what is needed for the cooling intake valves.
(1) Upstream View (IA Side 9/25/2023)
(2) Downstream View (IA Side 9/25/2023)

Other Real-time and/or Archive Data Sources:

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How low could the river get?
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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: 2-Nov-2020 7:29 PM
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