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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 Merrill Stage (ft)Flow (kcfs)MRLI4(plotting HGIRZ) Graph Created (11:13AM May 23, 2013)Flood Stage is 12 ft
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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 Merrill are issued as needed during times of high water, but are not routinely available.

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Upstream Gauge - at Le Mars Upstream Gauge Downstream Gauge Downstream Gauge - at James
Flood Categories (in feet)
Major Flood Stage:16
Moderate Flood Stage:14
Flood Stage:12
Action Stage:10

Historical Crests
(1) 20.00 ft on 09/18/1926
(2) 18.40 ft on 06/07/1934
(3) 18.00 ft on 06/08/1953
(4) 17.00 ft on 06/16/1983
(5) 17.00 ft on 03/24/1979
Show More Historical Crests

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 Plymouth County Highway C44 at the east of the bridge at the gage will be flooded.
21 The bridge on County Road C38 is overtopped...and water reached the low steel on the bridge on Plymouth County Highway C44.
20.5 The railroad tracks at the bridge 750 feet upstream of the gage are flooded.
19 Approximately 2200 acres of farm land are flooded.
18 The water reaches the bottom of the bridge on County Road C38.
17.5 The levees protecting the sewage treatment lagoons on the left bank of the river are overtopped.
16 Flooding begins to affect the eastern edges of the city of Merrill...and about 2000 acres of farm land are flooded.
15.5 The west approach to the bridge on Plymouth County Highway C44 at the gaging location begins to flood.
14 Approximately 1600 acres of farm land are flooded.
12 Flooding of the low lying farm land begins.
Photos
(1) Upstream View
(2) Downstream View
About This Location Collapse

Latitude: 42.720833° N, Longitude: 96.240833° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 12 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 1154.4 ft 1166.4 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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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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