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Over 200 USGS real-time streamgages used to support NWS river forecasts and warnings are at risk of being discontinued. Click here for more information from the USGS...
Weather Forecast Office Sioux Falls, SD Missouri Basin River Forecast Center
Hydrograph River at a Glance Download Weekly Chance of
Exceeding Levels		 Chance of Exceeding Levels
During Entire Period
Floyd River at Le Mars Stage (ft)LMRI4(plotting HGIRZ) Graph Created (10:32AM May 19, 2013)Flood Stage is 20 ft
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Datum: Not Available
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NOTE: Automated gauge readings are unavailable, readings taken manually.

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: Forecasts for the Floyd River at Le Mars are issued as needed during times of high water, but are not routinely available.

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Upstream Gauge - near Struble Upstream Gauge Downstream Gauge Downstream Gauge - at Merrill
Flood Categories (in feet)
Major Flood Stage:24
Moderate Flood Stage:21
Flood Stage:20
Action Stage:18

Historical Crests
(1) 26.40 ft on 06/08/1953
(2) 24.50 ft on 06/21/1996
(3) 24.40 ft on 04/03/1973
(4) 24.10 ft on 03/29/1962
(5) 24.00 ft on 06/21/1983
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Low Water Records
Currently none available.
Legend
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 Collapse
24 Approximately 2100 acres of farm land are flooded.
22 Approximately 1400 acres of farm land are flooded.
21 Flooding begins to affect 4th Avenue NE in Le Mars.
20.5 160th Street near Highway 60 is flooded.
20 Some agricultural land begins to flood...and the low lying areas in the western edges of Le Mars begin to flood.
Photos
(1) Upstream View
(2) Downstream View
About This Location Collapse

Latitude: 42.800278° N, Longitude: 96.173889° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 20 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 1180 ft 1200 ft Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  
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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Page last modified: 13-Mar-2013 6:27 PM 		Disclaimer
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