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Hydrograph River at a Glance Download
Shell Rock River (Northeast IA) near Marble Rock Stage (ft)Flow (cfs)National Weather ServiceMBLI4(plotting HGIRZ) Graph Created (8:48PM May 16, 2022)Flood Stage is 4 ft
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Datum: Not Available
NOTE: Forecasts are not available for the Shell Rock River (Northeast IA) near Marble Rock. Only observed stages are available for this point.
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Upstream Gauge - near IFC--Rockford Foothill Ave Upstream Gauge Downstream Gauge Downstream Gauge - at Shell Rock
Flood Categories (in feet)
Major Flood Stage: 8
Moderate Flood Stage: 5
Flood Stage: 4
Action Stage: 3
Low Stage (in feet): -9999

Historic Crests
(1) 105.90 ft on 03/06/1937
(2) 101.70 ft on 06/25/1938
(3) 98.90 ft on 06/03/1941
(4) 98.80 ft on 03/14/1939
(5) 98.50 ft on 06/12/1941
(6) 97.70 ft on 09/15/1938
(7) 97.50 ft on 03/05/1935
(8) 97.40 ft on 06/01/1942
(9) 97.20 ft on 03/17/1936
(10) 97.10 ft on 03/12/1936
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(P): Preliminary values subject to further review.

Recent Crests
(1) 5.01 ft on 07/06/2004
(2) 8.20 ft on 04/12/2001
(3) 10.60 ft on 07/21/1999
(4) 4.69 ft on 03/21/1997
(5) 5.26 ft on 03/11/1997
(6) 4.02 ft on 06/24/1994 (P)
(7) 4.72 ft on 08/19/1993
(8) 6.02 ft on 07/18/1993
(9) 6.92 ft on 06/20/1993
(10) 7.92 ft on 04/01/1993
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(P): Preliminary values subject to further review.

Low Water Records
(1) 0.33 ft on 01/09/1945
(2) 0.35 ft on 07/31/1988
(3) 0.35 ft on 08/16/1988
(4) 0.45 ft on 07/24/1988
(5) 0.70 ft on 07/06/1956
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For more information on your flood risk go to

Zoom Level:14
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Gauge LocationGauge Map Marker
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
7 Several residences in Greene are threatened.
6 The Gates River bridge trailer park is partially flooded.
5 The Gates River bridge trailer park is affected and evacuations may occur. Residences may be threatened further downstream toward Greene.
4.5 Several summer cabins and trailers threatened between Marble Rock and Greene.
4 Water flows into adjacent lowland areas.
About This Location Collapse

Latitude: 42.965249° N, Longitude: 92.871028° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 4 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  

Current/Historical Observations:

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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
Des Moines Weather Forecast Office
9607 NW Beaver Dr.
Des Moines, IA 50131
(515) 270-2614
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Page last modified: 2-Nov-2020 7:29 PM
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