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  The 2019 National Hydrologic Assessment - Spring Flood Outlook has been released (3/21/19) - Visit website, story map, or download file

Hydrograph River at a Glance Download
Minnesota River at Big Stone Lake Pool (ft)Observed: 967.25 ft at 8:00AM Mar 18, 2019Observed: 967.2 ft at 8:00AM Mar 19, 2019Observed: 967.15 ft at 8:00AM Mar 20, 2019Observed: 967.4 ft at 4:00PM Mar 21, 2019Observed: 967.7 ft at 8:00AM Mar 22, 2019Observed: 967.8 ft at 1:30PM Mar 22, 2019Observed: 968 ft at 4:30PM Mar 22, 2019Observed: 968.1 ft at 8:30PM Mar 22, 2019Observed: 968.35 ft at 4:30AM Mar 23, 2019Observed: 968.4 ft at 11:30AM Mar 23, 2019Observed: 968.45 ft at 3:00PM Mar 23, 2019Observed: 968.5 ft at 6:00PM Mar 23, 2019Observed: 968.65 ft at 9:30PM Mar 23, 2019Observed: 968.9 ft at 6:00AM Mar 24, 2019Observed: 969 ft at 11:00AM Mar 24, 2019Highest Observation: 969.15 ft at 4:00PM Mar 24, 2019Forecast: 968.5 ft 7:00PM Mar 24, 2019Forecast: 968.6 ft 1:00AM Mar 25, 2019Forecast: 968.7 ft 7:00AM Mar 25, 2019Forecast: 968.9 ft 1:00PM Mar 25, 2019Forecast: 969 ft 7:00PM Mar 25, 2019Forecast: 969.1 ft 1:00AM Mar 26, 2019Forecast: 969.2 ft 7:00AM Mar 26, 2019Forecast: 969.3 ft 1:00PM Mar 26, 2019Forecast: 969.4 ft 7:00PM Mar 26, 2019Forecast: 969.4 ft 1:00AM Mar 27, 2019Forecast: 969.5 ft 7:00AM Mar 27, 2019Highest Forecast: 969.6 ft 1:00PM Mar 27, 2019BSLM5(plotting HPIRZ) Graph Created (6:30PM Mar 24, 2019)ObservedForecast (issued 9:14AM Mar 24)Latest observed value: 969.15 ft at 4:00 PM CDT 24-Mar-2019. Flood Stage is 971.5 ft
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Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: Not Available
NOTE: Automated gauge readings are unavailable, readings taken manually.

Reliability of the Forecast: Forecast data shown here are guidance values only. Please refer to your local NWS office.

NOTE: Forecasts for the Minnesota River at Big Stone Lake are issued as needed during times of high water, but are not routinely available.

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Downstream Gauge Downstream Gauge - at Ortonville
Flood Categories (in feet)
Major Flood Stage: 975
Moderate Flood Stage: 973
Flood Stage: 971.5
Action Stage: 0
Low Stage (in feet): -9999

Historic Crests
(1) 975.40 ft on 01/01/1900

(P): Preliminary values subject to further review.

Recent Crests
(1) 975.40 ft on 01/01/1900

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to

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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.
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Latitude: 45.309167° N, Longitude: 96.468056° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 971.5 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
(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 Not Available Not Available  
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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
Aberdeen Weather Forecast Office
824 Brown County 14 South
Aberdeen, SD 57401
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Page last modified: 1-Mar-2019 12:34 AM
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