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This probabilistic forecast is issued by the North Central River Forecast Center.
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About this graph
Forecasts for the Iroquois River at Iroquois are issued as needed during times of high water, but are not routinely available.
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Upstream Gauge - near Foresman Upstream Gauge Downstream Gauge Downstream Gauge - near Chebanse
Zoom Level:15
Flood Categories (in feet)
Major Flood Stage: 25
Moderate Flood Stage: 24
Flood Stage: 18
Action Stage: 17
Low Stage (in feet): 3

Historic Crests
(1) 26.31 ft on 06/13/1958
(2) 26.17 ft on 02/22/2018
(3) 25.81 ft on 01/09/2008
(4) 25.74 ft on 07/12/2003
(5) 25.27 ft on 06/21/2015
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 22.03 ft on 06/28/2020
(2) 17.25 ft on 05/19/2020
(3) 19.10 ft on 01/14/2020
(4) 20.59 ft on 05/03/2019
(5) 17.89 ft on 02/08/2019
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 2.93 ft on 09/22/1991
(2) 3.26 ft on 09/07/1995
(3) 3.36 ft on 09/27/1999
(4) 3.59 ft on 08/01/2012
(5) 3.79 ft on 09/08/2005
Show More Low Water Records
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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
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29.6 Water reaches bottom of Route 52 bridge.
27 Residences threatened near US-52/Main Street in Iroquois.
26.5 US-52/Main Street threatened near the river in Iroquois.
26 Widespread inundation of structures and roads begins in east Watseka.
25 Flooding of some buildings near the river begins.
21.5 County Road 1950N threatened north of Watseka.
18 Agricultural areas near the river begin to flood.
(1) Looking downstream 10/14/2010. Gage height 3.98 ft.
(2) Looking upstream 10/14/2010. Gage height 3.98 ft.
Low Water Impacts Collapse
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2.5 River nears zero flow.
3.0 Approximate stage of the 1-in-10 annual chance flow (7-day average).

Other Real-time and/or Archive Data Sources:

Additional Information Collapse
How much forecast precipitation was used for the current river forecast?
USGS Streamflow Duration Hydrograph
How low could the river get?
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
Chicago Weather Forecast Office
333 W. University Dr.
Romeoville, IL 60446
(815) 834-1435
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Page last modified: 2-Nov-2020 7:29 PM
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