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FloodSmart
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Hydrograph River at a Glance Download
Big Sioux River at Hawarden Stage (ft)USGS--Water Resources of the United StatesGYVS2(plotting HGIRG) Graph Created (2:03AM Aug 22, 2019)Flood Stage is 55 ft
About this graph
Tabular Data (UTC)
Tabular Data (CDT)
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Datum: Not Available
Metadata
NOTE: Flow values shown may be different than other data sources. All observations are preliminary data.

NOTE: River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.

NOTE: Graphical forecasts are not available for the Big Sioux River at Hawarden. During times of high water, forecast crest information can be found in the text products.

Return to Area Map
Upstream Gauge - above Hawarden Upstream Gauge Downstream Gauge Downstream Gauge - at Akron
Flood Categories (in feet)
Major Flood Stage: 23
Moderate Flood Stage: 20
Flood Stage: 15
Action Stage: 13
Low Stage (in feet): -9999

Historic Crests
(1) 27.92 ft on 06/17/2014
(2) 24.90 ft on 05/10/1993
(3) 24.70 ft on 09/27/2010
(4) 24.60 ft on 04/09/1969
(5) 24.20 ft on 06/23/1984
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 27.92 ft on 06/17/2014
(2) 19.40 ft on 05/27/2013
(3) 17.20 ft on 05/10/2012
(4) 20.30 ft on 03/26/2011
(5) 24.70 ft on 09/27/2010
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
23 Water backs up into the park in Hawarden, and some basements and sewers could begin to have problems.
21.5 Iowa Highway 10 begins to flood.
20 Some farm houses on the South Dakota side of the river are isolated by high water.
19 South Dakota Highway 46 begins to flood.
15 Agricultural flooding begins on the South Dakota side of the river.
12 The lowest banks overflow and begin to flood into sloughs.
Photos
(1) Upstream View
(2) Downstream View
About This Location Collapse

Latitude: 42.998333° N, Longitude: 96.498056° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 15 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 1147.27 ft 1162.27 ft  
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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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