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Hydrograph River at a Glance Download
Floyd River at Le Mars Stage (ft)Flow (cfs)Observed: 9.88 ft at 4:00PM Oct 13, 2017Observed: 9.85 ft at 5:00PM Oct 13, 2017Observed: 9.88 ft at 6:00PM Oct 13, 2017Highest Observation: 9.9 ft at 7:00PM Oct 13, 2017Observed: 9.87 ft at 7:00AM Oct 15, 2017Observed: 9.73 ft at 6:00AM Oct 16, 2017Observed: 9.75 ft at 7:00AM Oct 16, 2017Observed: 9.75 ft at 8:00AM Oct 16, 2017Observed: 9.85 ft at 9:00AM Oct 16, 2017Observed: 9.85 ft at 10:00AM Oct 16, 2017Observed: 9.73 ft at 11:00PM Oct 16, 2017Observed: 9.58 ft at 3:00PM Oct 17, 2017Observed: 9.5 ft at 1:00AM Oct 21, 2017Observed: 9.5 ft at 2:00AM Oct 21, 2017Iowa Flood CenterLMRI4(plotting HGIR5) Graph Created (3:18AM Oct 21, 2017)ObservedLatest observed value: 9.5 ft at 2:00 AM CDT 21-Oct-2017. Flood Stage is 20 ft
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Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: Not Available
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
Low Stage (in feet): -9999

Historic 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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(P): Preliminary values subject to further review.

Recent Crests
(1) 20.50 ft on 06/20/2014
(2) 24.00 ft on 05/27/2013
(3) 20.88 ft on 03/15/2010
(4) 16.00 ft on 04/14/2001
(5) 24.50 ft on 06/21/1996
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(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to

Zoom Level:14
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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.
Flood Impacts & Photos Collapse
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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.
(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)
(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  
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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
Sioux Falls Weather Forecast Office
26 Weather Lane
Sioux Falls, SD 57104-0198
(605) 330-4247
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Page last modified: 21-Dec-2016 10:37 PM
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