National Weather Service Advanced Hydrologic Prediction Service

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Visit https://www.weather.gov/owp/operations for access to new EXPERIMENTAL products and services from the National Water Center: National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook and the National Water Center Visualization Services, a suite of geospatial services depicting River Forecast Center and National Water Model information.

View the Enhanced Operating Capability Products and Services StoryMap here

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 (UTC)

Tabular Data (CST)

Datum: NAVD88

Metadata

NOTE: 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.

NOTE: Gauge reading may be affected by ice.

NOTE: Forecasts for the Big Sioux River near Brookings are issued as needed during times of high water, but are not routinely available.

Vertical Datum updated from NGVD29 to NAVD88 by gauge owner.

Return to Area Map

Upstream Gauge

Downstream Gauge

Flood Categories (in feet)

Major Flood Stage:	12
Moderate Flood Stage:	10.5
Flood Stage:	9
Action Stage:	8
Low Stage (in feet):	-9999

Historic Crests
(1) 14.77 ft on 04/09/1969
(2) 14.34 ft on 09/13/2019
(3) 13.70 ft on 06/22/1984
(4) 13.66 ft on 09/25/2010
(5) 13.50 ft on 07/04/1993
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 11.05 ft on 03/12/2020
(2) 14.34 ft on 09/13/2019
(3) 13.11 ft on 03/22/2019 (P)
(4) 12.30 ft on 04/24/2018
(5) 7.40 ft on 05/25/2017
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to www.floodsmart.gov.

Show FEMA's National Flood Hazard Layers

Zoom Level:14

	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

If you notice any errors in the below information, please contact our Webmaster
16	the bridges on 473rd Avenue and 475th Avenue are overtopped.
14	the water reaches the bottom of the bridges on 473rd Avenue and 475th Avenue.
13	the bridge 1 mile south of Medary on 471st Avenue is overtopped.
12	475th Avenue and 222nd Street being to flood.
11.7	473rd Avenue at 221st Street begins to flood.
11	some farm outbuildings begin to flood.
10.3	473rd Avenue north of the gauge begins to flood.
10	flooding begins to affect agricultural lands along the right bank of the river.
9	significant amounts of pasture and farm lands begin flooding on the left bank of the river. The road south of the Brookings water treatment plant is flooded, as is 217th Street between 468th and 469th Avenues.
8	there is some minor overflow of the lowest banks along this stretch of the river.
Photos (1) Upstream View (2) Downstream View

About This Location

Latitude: 44.180278° N, Longitude: 96.749167° W, Horizontal Datum: NAD27

River Stage Reference Frame	Gauge Height	Flood Stage	Uses
NWS stage	0 ft	9 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	1552.78	1561.78	Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29	Not Available	Not Available	Older USGS topographic maps, NGVD29 benchmarks
MSL	Not Available	Not Available	Older USGS topographic maps, MSL benchmarks
Other	Not Available	Not Available

Current/Historical Observations:

Additional Information

How low could the river get?

Resources

Hydrologic Resources

Additional 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: 2-Nov-2020 7:29 PM

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