Skip Navigation Link weather.gov  
NOAA logo - Click to go to the NOAA homepage National Weather Service NWS logo - Click to go to the NWS homepage
Advanced Hydrologic Prediction Service
Image background of Navigation bar Left Home News Organization
Navigation Bar End Cap

  

National Conditions
    Rivers
    Satellite
    Climate
    Observed Precip

Local Conditions
    Warnings
    Weather Forecast
    Radar (Enhanced)
    Radar (Standard-Low Bandwidth)

AHPS Documentation
    User Guide
    User Brochure

What is AHPS?
    Facts
    Our Partners

Feedback/Questions
    Provide Feedback
    Ask Questions

When flooded turn around don't drown
FloodSmart
USA.gov Official Web Portal
 

This probabilistic forecast is issued by the Missouri Basin River Forecast Center.
tab left off Hydrograph tab right off tab left off River at a Glance tab right off tab left off Download tab right off tab left on tab right on
Experimental Short Range Forecast Uncertainty (AHPS) - External Links: Product Description Document | Customer Survey
About this graph
Forecasts for the Big Sioux River at Sioux City are issued as needed during times of high water, but are not routinely available.
Return to Area Map

Zoom Level:14
Flood Categories (in feet)
Major Flood Stage: 41
Moderate Flood Stage: 38
Flood Stage: 32
Action Stage: 29
Low Stage (in feet): -9999

Historic Crests
(1) 37.70 ft on 06/20/2014
(2) 37.46 ft on 03/17/2019
(3) 31.57 ft on 06/25/2018
(4) 21.89 ft on 04/02/2020
(5) 19.04 ft on 05/04/2016
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 14.94 ft on 06/02/2022
(2) 12.37 ft on 09/01/2021
(3) 21.89 ft on 04/02/2020
(4) 37.46 ft on 03/17/2019
(5) 31.57 ft on 06/25/2018
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
KML Image
Gauge LocationGauge Map Marker
 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 Collapse
If you notice any errors in the below information, please contact our Webmaster
48 The levees on the South Dakota side are overtopped.
45.5 More significant levee overtopping occurs in the Iowa Riverside Community.
43 The lower levees in the Iowa Riverside community are in danger of being overtopped if not sandbagged.
38 Most of the storm drains are submerged.
37 Several structures south of River Dr on the SD will flood if a levee failure occurs.
35 Some lower portions south of River Dr on the SD may be at risk of flooding with a levee failure.
32 Agricultural land north of the leveed area begins to flood.
Photos
(1) Downstream View
(2) Upstream View

Other Real-time and/or Archive Data Sources:
Additional Information Collapse
Flood stage and impact levels have recently changed due to a change in the zero datum for this gauge. 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
Ask Questions/Webmaster
Page last modified: 2-Nov-2020 7:29 PM 		Disclaimer
Credits
Glossary 		Privacy Policy
About Us
Career Opportunities