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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 Big Sioux River at Akron are issued as needed during times of high water, but are not routinely available.
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Upstream Gauge - above Hawarden Upstream Gauge
Zoom Level:14
Flood Categories (in feet)
Major Flood Stage: 20
Moderate Flood Stage: 18
Flood Stage: 16
Action Stage: 14
Low Stage (in feet): -9999

Historic Crests
(1) 25.59 ft on 06/18/2014
(2) 23.94 ft on 03/16/2019
(3) 23.50 ft on 06/23/2018
(4) 23.38 ft on 04/26/2001
(5) 23.05 ft on 05/10/1993
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 14.03 ft on 06/01/2022
(2) 11.45 ft on 08/30/2021
(3) 17.67 ft on 04/01/2020
(4) 23.94 ft on 03/16/2019
(5) 23.50 ft on 06/23/2018
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
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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
25 Much of Highway 48 east of the bridge is flooded and the remaining levees in Akron are overtopped.
23.25 Levee gates at Riverside in Sioux City will be closed.
23 The higher levees on the Iowa side of the river are in danger of being overtopped, Highway 50 near Westfield will be flooded, and the bridge east of Jefferson will be overtopped.
22 Highway 48 begins to flood where the railroad tracks cross, and Iowa Highway 3 begins to flood on the east side of the river.
21.5 Highway 48 near the intersection with Iowa Highway 12 north of Akron begins to flood.
20 Highway 48 near Akron is flooded and the parking lot at the boat ramp in Akron begins to flood.
19.5 Several farm houses are flooded.
17 About 6500 acres of farm land are flooded.
16 Several farm levees are overtopped with significant flooding of agricultural lands.
15 Some rural roads on the South Dakota side of the river begin to flood.
12 Some very minor flooding of the lowest lying areas along the river begins.
(1) Downstream View
(2) Upstream View

Other Real-time and/or Archive Data Sources:

Additional Information Collapse

View Live River Camera Images via USGS HIVIS Webpage

How low could the river get?

Collaborative Agencies Collapse
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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