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Hydrograph River at a Glance Download
Big Sioux River at Flandreau Stage (ft)Flow (cfs)Highest Observation: 4.92 ft at 1:30PM Feb 25, 2021Observed: 4.59 ft at 1:45PM Feb 25, 2021Observed: 4.59 ft at 1:46PM Feb 25, 2021Observed: 4.57 ft at 2:00PM Feb 25, 2021Observed: 4.57 ft at 2:01PM Feb 25, 2021Observed: 4.55 ft at 2:15PM Feb 25, 2021Observed: 4.55 ft at 2:16PM Feb 25, 2021Observed: 4.53 ft at 2:30PM Feb 25, 2021Observed: 4.52 ft at 2:45PM Feb 25, 2021Observed: 4.51 ft at 3:00PM Feb 25, 2021Observed: 4.5 ft at 3:15PM Feb 25, 2021Observed: 4.49 ft at 3:30PM Feb 25, 2021Observed: 4.49 ft at 3:45PM Feb 25, 2021Observed: 4.49 ft at 3:46PM Feb 25, 2021Observed: 4.48 ft at 4:00PM Feb 25, 2021Observed: 4.48 ft at 4:01PM Feb 25, 2021Observed: 4.47 ft at 4:15PM Feb 25, 2021Observed: 4.47 ft at 4:16PM Feb 25, 2021Observed: 4.56 ft at 4:30PM Feb 25, 2021Observed: 4.55 ft at 4:45PM Feb 25, 2021Observed: 4.55 ft at 4:46PM Feb 25, 2021Observed: 4.53 ft at 5:00PM Feb 25, 2021Observed: 4.53 ft at 5:01PM Feb 25, 2021Observed: 4.5 ft at 5:15PM Feb 25, 2021Observed: 4.5 ft at 5:16PM Feb 25, 2021Observed: 4.5 ft at 5:30PM Feb 25, 2021Observed: 4.49 ft at 5:45PM Feb 25, 2021Observed: 4.45 ft at 6:00PM Feb 25, 2021Observed: 4.45 ft at 6:15PM Feb 25, 2021Observed: 4.47 ft at 6:30PM Feb 25, 2021Observed: 4.47 ft at 6:45PM Feb 25, 2021Observed: 4.47 ft at 6:46PM Feb 25, 2021Observed: 4.48 ft at 7:00PM Feb 25, 2021Observed: 4.48 ft at 7:01PM Feb 25, 2021Observed: 4.48 ft at 7:15PM Feb 25, 2021Observed: 4.48 ft at 7:16PM Feb 25, 2021Observed: 4.48 ft at 7:30PM Feb 25, 2021Observed: 4.47 ft at 7:45PM Feb 25, 2021Observed: 4.47 ft at 8:00PM Feb 25, 2021Observed: 4.46 ft at 8:15PM Feb 25, 2021Observed: 4.45 ft at 8:30PM Feb 25, 2021Observed: 4.44 ft at 8:45PM Feb 25, 2021Observed: 4.42 ft at 9:00PM Feb 25, 2021Observed: 4.42 ft at 9:01PM Feb 25, 2021Observed: 4.41 ft at 9:15PM Feb 25, 2021Observed: 4.41 ft at 9:16PM Feb 25, 2021Observed: 4.41 ft at 9:30PM Feb 25, 2021Observed: 4.41 ft at 9:31PM Feb 25, 2021Observed: 4.4 ft at 9:45PM Feb 25, 2021Observed: 4.39 ft at 10:00PM Feb 25, 2021Observed: 4.39 ft at 10:01PM Feb 25, 2021Observed: 4.38 ft at 10:15PM Feb 25, 2021Observed: 4.38 ft at 10:16PM Feb 25, 2021Observed: 4.37 ft at 10:30PM Feb 25, 2021Observed: 4.37 ft at 10:31PM Feb 25, 2021Observed: 4.36 ft at 10:45PM Feb 25, 2021Observed: 4.35 ft at 11:00PM Feb 25, 2021Observed: 4.35 ft at 11:01PM Feb 25, 2021Observed: 4.35 ft at 11:15PM Feb 25, 2021Observed: 4.35 ft at 11:16PM Feb 25, 2021Observed: 4.34 ft at 11:30PM Feb 25, 2021Observed: 4.34 ft at 11:31PM Feb 25, 2021Observed: 4.33 ft at 11:45PM Feb 25, 2021Observed: 4.32 ft at 12:00AM Feb 26, 2021Observed: 4.32 ft at 12:01AM Feb 26, 2021Observed: 4.32 ft at 12:15AM Feb 26, 2021Observed: 4.32 ft at 12:16AM Feb 26, 2021Observed: 4.31 ft at 12:30AM Feb 26, 2021Observed: 4.31 ft at 12:31AM Feb 26, 2021Observed: 4.3 ft at 12:45AM Feb 26, 2021Observed: 4.3 ft at 1:00AM Feb 26, 2021Observed: 4.29 ft at 1:15AM Feb 26, 2021Observed: 4.28 ft at 1:30AM Feb 26, 2021Observed: 4.22 ft at 1:45AM Feb 26, 2021Observed: 4.2 ft at 2:00AM Feb 26, 2021Observed: 4.2 ft at 2:01AM Feb 26, 2021Observed: 4.19 ft at 2:15AM Feb 26, 2021Observed: 4.19 ft at 2:16AM Feb 26, 2021Observed: 4.18 ft at 2:30AM Feb 26, 2021Observed: 4.18 ft at 2:31AM Feb 26, 2021Observed: 4.18 ft at 2:45AM Feb 26, 2021Observed: 4.17 ft at 3:00AM Feb 26, 2021Observed: 4.17 ft at 3:15AM Feb 26, 2021Observed: 4.16 ft at 3:30AM Feb 26, 2021Observed: 4.16 ft at 3:45AM Feb 26, 2021Observed: 4.15 ft at 4:00AM Feb 26, 2021Observed: 4.15 ft at 4:01AM Feb 26, 2021Observed: 4.14 ft at 4:15AM Feb 26, 2021Observed: 4.14 ft at 4:16AM Feb 26, 2021Observed: 4.13 ft at 4:30AM Feb 26, 2021Observed: 4.13 ft at 4:31AM Feb 26, 2021Observed: 4.12 ft at 4:45AM Feb 26, 2021Observed: 4.12 ft at 5:00AM Feb 26, 2021Observed: 4.11 ft at 5:15AM Feb 26, 2021Observed: 4.11 ft at 5:30AM Feb 26, 2021Observed: 4.1 ft at 5:45AM Feb 26, 2021Observed: 4.09 ft at 6:00AM Feb 26, 2021Observed: 4.08 ft at 6:15AM Feb 26, 2021Observed: 4.08 ft at 6:16AM Feb 26, 2021Observed: 4.07 ft at 6:30AM Feb 26, 2021Observed: 4.07 ft at 6:31AM Feb 26, 2021Observed: 4.06 ft at 6:45AM Feb 26, 2021Observed: 4.06 ft at 6:46AM Feb 26, 2021Observed: 4.05 ft at 7:00AM Feb 26, 2021Observed: 4.04 ft at 7:15AM Feb 26, 2021Observed: 4.04 ft at 7:16AM Feb 26, 2021Observed: 4.04 ft at 7:30AM Feb 26, 2021Observed: 4.04 ft at 7:31AM Feb 26, 2021Observed: 4.03 ft at 7:45AM Feb 26, 2021Observed: 4.03 ft at 7:46AM Feb 26, 2021Observed: 4.02 ft at 8:00AM Feb 26, 2021Observed: 4.02 ft at 8:15AM Feb 26, 2021Observed: 4.02 ft at 8:30AM Feb 26, 2021Observed: 4.02 ft at 8:45AM Feb 26, 2021Observed: 4.02 ft at 9:00AM Feb 26, 2021Observed: 4.01 ft at 9:15AM Feb 26, 2021Observed: 4.01 ft at 9:30AM Feb 26, 2021Observed: 4.01 ft at 9:45AM Feb 26, 2021Observed: 4.01 ft at 10:00AM Feb 26, 2021Observed: 4 ft at 10:15AM Feb 26, 2021Observed: 4.01 ft at 10:30AM Feb 26, 2021Observed: 4 ft at 10:45AM Feb 26, 2021Observed: 4.01 ft at 11:00AM Feb 26, 2021Observed: 4.01 ft at 11:15AM Feb 26, 2021Observed: 4.01 ft at 11:16AM Feb 26, 2021Observed: 4.01 ft at 11:30AM Feb 26, 2021Observed: 4.01 ft at 11:31AM Feb 26, 2021Observed: 4.01 ft at 11:45AM Feb 26, 2021Observed: 4.01 ft at 11:46AM Feb 26, 2021Observed: 4.01 ft at 12:00PM Feb 26, 2021Observed: 4.01 ft at 12:15PM Feb 26, 2021Observed: 3.99 ft at 12:30PM Feb 26, 2021Observed: 4.02 ft at 12:45PM Feb 26, 2021Observed: 4.02 ft at 1:00PM Feb 26, 2021Observed: 4.02 ft at 1:15PM Feb 26, 2021Observed: 4.02 ft at 1:16PM Feb 26, 2021Observed: 4.03 ft at 1:30PM Feb 26, 2021Observed: 4.03 ft at 1:31PM Feb 26, 2021Observed: 4.04 ft at 1:45PM Feb 26, 2021Observed: 4.04 ft at 1:46PM Feb 26, 2021Observed: 4.03 ft at 2:00PM Feb 26, 2021Observed: 4.03 ft at 2:15PM Feb 26, 2021Observed: 4.06 ft at 2:30PM Feb 26, 2021Observed: 4.06 ft at 2:45PM Feb 26, 2021Observed: 4.07 ft at 3:00PM Feb 26, 2021Observed: 4.06 ft at 3:15PM Feb 26, 2021Observed: 4.07 ft at 3:30PM Feb 26, 2021Observed: 4.07 ft at 3:31PM Feb 26, 2021Observed: 4.08 ft at 3:45PM Feb 26, 2021Observed: 4.08 ft at 3:46PM Feb 26, 2021Observed: 4.07 ft at 4:00PM Feb 26, 2021Observed: 4.07 ft at 4:01PM Feb 26, 2021Observed: 4.09 ft at 4:15PM Feb 26, 2021Observed: 4.06 ft at 4:30PM Feb 26, 2021Observed: 4.06 ft at 4:31PM Feb 26, 2021Observed: 4.07 ft at 4:45PM Feb 26, 2021Observed: 4.07 ft at 4:46PM Feb 26, 2021Observed: 4.11 ft at 5:00PM Feb 26, 2021Observed: 4.11 ft at 5:01PM Feb 26, 2021Observed: 4.07 ft at 5:15PM Feb 26, 2021Observed: 4.07 ft at 5:30PM Feb 26, 2021Observed: 4.07 ft at 5:31PM Feb 26, 2021Observed: 4.08 ft at 5:45PM Feb 26, 2021Observed: 4.08 ft at 5:46PM Feb 26, 2021Observed: 4.08 ft at 6:00PM Feb 26, 2021Observed: 4.08 ft at 6:01PM Feb 26, 2021Observed: 4.08 ft at 6:15PM Feb 26, 2021Observed: 4.12 ft at 6:30PM Feb 26, 2021Observed: 4.14 ft at 6:45PM Feb 26, 2021Observed: 4.14 ft at 7:00PM Feb 26, 2021Observed: 4.14 ft at 7:15PM Feb 26, 2021Observed: 4.15 ft at 7:30PM Feb 26, 2021Observed: 4.15 ft at 7:31PM Feb 26, 2021Observed: 4.15 ft at 7:45PM Feb 26, 2021Observed: 4.15 ft at 7:46PM Feb 26, 2021Observed: 4.16 ft at 8:00PM Feb 26, 2021Observed: 4.16 ft at 8:01PM Feb 26, 2021Observed: 4.16 ft at 8:15PM Feb 26, 2021Observed: 4.15 ft at 8:30PM Feb 26, 2021Observed: 4.15 ft at 8:31PM Feb 26, 2021Observed: 4.17 ft at 8:45PM Feb 26, 2021Observed: 4.17 ft at 8:46PM Feb 26, 2021Observed: 4.17 ft at 9:00PM Feb 26, 2021Observed: 4.17 ft at 9:01PM Feb 26, 2021Observed: 4.16 ft at 9:15PM Feb 26, 2021Observed: 4.16 ft at 9:30PM Feb 26, 2021Observed: 4.15 ft at 9:45PM Feb 26, 2021Observed: 4.15 ft at 10:00PM Feb 26, 2021Observed: 4.14 ft at 10:15PM Feb 26, 2021Observed: 4.13 ft at 10:30PM Feb 26, 2021Observed: 4.13 ft at 10:31PM Feb 26, 2021Observed: 4.14 ft at 10:45PM Feb 26, 2021Observed: 4.14 ft at 10:46PM Feb 26, 2021Observed: 4.14 ft at 11:00PM Feb 26, 2021Observed: 4.14 ft at 11:01PM Feb 26, 2021Observed: 4.13 ft at 11:15PM Feb 26, 2021Observed: 4.13 ft at 11:30PM Feb 26, 2021Observed: 4.13 ft at 11:45PM Feb 26, 2021Observed: 4.13 ft at 12:00AM Feb 27, 2021Observed: 4.12 ft at 12:15AM Feb 27, 2021Observed: 4.12 ft at 12:30AM Feb 27, 2021Observed: 4.12 ft at 12:31AM Feb 27, 2021Observed: 4.12 ft at 12:45AM Feb 27, 2021Observed: 4.12 ft at 12:46AM Feb 27, 2021Observed: 4.12 ft at 1:00AM Feb 27, 2021Observed: 4.12 ft at 1:01AM Feb 27, 2021Observed: 4.12 ft at 1:15AM Feb 27, 2021Observed: 4.11 ft at 1:30AM Feb 27, 2021Observed: 4.11 ft at 1:45AM Feb 27, 2021Observed: 4.11 ft at 2:00AM Feb 27, 2021Observed: 4.11 ft at 2:15AM Feb 27, 2021Observed: 4.11 ft at 2:30AM Feb 27, 2021Observed: 4.11 ft at 2:45AM Feb 27, 2021Observed: 4.11 ft at 2:46AM Feb 27, 2021Observed: 4.11 ft at 3:00AM Feb 27, 2021Observed: 4.11 ft at 3:01AM Feb 27, 2021Observed: 4.1 ft at 3:15AM Feb 27, 2021Observed: 4.1 ft at 3:16AM Feb 27, 2021Observed: 4.1 ft at 3:30AM Feb 27, 2021Observed: 4.09 ft at 3:45AM Feb 27, 2021Observed: 4.09 ft at 3:46AM Feb 27, 2021Observed: 4.08 ft at 4:00AM Feb 27, 2021Observed: 4.08 ft at 4:01AM Feb 27, 2021Observed: 4.08 ft at 4:15AM Feb 27, 2021Observed: 4.08 ft at 4:16AM Feb 27, 2021Observed: 4.07 ft at 4:30AM Feb 27, 2021Observed: 4.07 ft at 4:45AM Feb 27, 2021Observed: 4.07 ft at 5:00AM Feb 27, 2021Observed: 4.06 ft at 5:15AM Feb 27, 2021Observed: 4.06 ft at 5:30AM Feb 27, 2021Observed: 4.06 ft at 5:45AM Feb 27, 2021Observed: 4.06 ft at 5:46AM Feb 27, 2021Observed: 4.06 ft at 6:00AM Feb 27, 2021Observed: 4.06 ft at 6:01AM Feb 27, 2021Observed: 4.06 ft at 6:15AM Feb 27, 2021Observed: 4.06 ft at 6:16AM Feb 27, 2021Observed: 4.05 ft at 6:30AM Feb 27, 2021Observed: 4.05 ft at 6:45AM Feb 27, 2021Observed: 4.05 ft at 6:46AM Feb 27, 2021Observed: 4.05 ft at 7:01AM Feb 27, 2021Observed: 4.05 ft at 7:16AM Feb 27, 2021USGS--Water Resources of the United StatesFCRS2(plotting HGIRG) Graph Created (8:04AM Feb 27, 2021)ObservedLatest observed value: 4.05 ft at 7:16 AM CST 27-Feb-2021. Flood Stage is 9 ft
About this graph
Tabular Data (UTC)
Tabular Data (CST)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: No forecasts are available for this location

NOTE: Gauge reading may be affected by ice.

NOTE: Forecasts are not available for the Big Sioux River at Flandreau. Only observed stages are available for this point.

Return to Area Map
Upstream Gauge - above Flandreau Upstream Gauge Downstream Gauge Downstream Gauge - near Dell Rapids
Flood Categories (in feet)
Major Flood Stage: 15
Moderate Flood Stage: 12
Flood Stage: 11
Action Stage: 9
Low Stage (in feet): -9999

Historic Crests
(1) 17.80 ft on 04/09/1969
(2) 15.30 ft on 09/12/2019
(3) 15.00 ft on 06/22/1984
(4) 14.20 ft on 06/17/1957
(5) 14.00 ft on 07/04/1993
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 15.30 ft on 09/12/2019
(2) 13.90 ft on 03/23/2011 (P)
(3) 12.20 ft on 03/17/2010
(4) 12.60 ft on 04/23/2001
(5) 13.60 ft on 04/03/1997
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.
Zoom Level:14
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
15 There is significant flooding at the Flandreau Indian School and the water pumping plant begins to flood.
13.5 About 20 homes in Trent are surrounded by water, and the Flandreau Creek Country Club golf course is flooded.
13 240th Street west of Trent is flooded and water threatens some homes in Trent.
12 The Road leading to the Flandreau Indian School begins to flood, and there is significant flooding in the Flandreau city park.
11 The Flandreau city park begins to flood.
Photos
(1) Upstream View
(2) Downstream View
About This Location Collapse

Latitude: 44.053611° N, Longitude: 96.593611° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 11 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 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other 1519.2 ft 1530.2 ft  
Resources Collapse
Hydrologic Resources Additional Resources
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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