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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 Illinois River near La Salle are issued routinely year-round.
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Downstream Gauge Downstream Gauge - near Henry
Zoom Level:15
Flood Categories (in feet)
Major Flood Stage: 31
Moderate Flood Stage: 27
Flood Stage: 20
Action Stage: 19
Low Stage (in feet): 8.7

Historic Crests
(1) 34.44 ft on 04/20/2013
(2) 33.79 ft on 09/16/2008
(3) 33.14 ft on 05/20/2020
(4) 32.14 ft on 05/03/2019
(5) 32.05 ft on 12/05/1982
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 33.14 ft on 05/20/2020
(2) 26.54 ft on 05/01/2020
(3) 23.69 ft on 01/13/2020
(4) 24.56 ft on 11/01/2019
(5) 26.77 ft on 09/30/2019
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 1.80 ft on 08/28/1868
KML Image
Gauge LocationGauge Map Marker
 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
If you notice any errors in the below information, please contact our Webmaster
34.5 North Utica Village Hall, police department, and wastewater treatement plant property are threatened.
33 A couple structures are threatened near the river in downtown La Salle.
32 Numerous industrial and utility properties are threatened along Water Street near downtown LaSalle. A few residences threatened in North Utica. IL-178 (Clark Street) threatened in North Utica.
31 A couple structures threatened in North Utica.
30 La Salle water pumping station property is threatened.
28.5 Water Street is threatened in Peru.
28 Dee Bennet Road is threatened between Ottawa and Utica.
22 Lower parking lot at Starved Rock State Park is inundated east of La Salle.
20 Agricultural areas in La Salle, Spring Valley, and Peru lowlands are flooded.
17.5 Low-lying agricultural land near the river is inundated.
Low Water Impacts Collapse
If you notice any errors in the below information, please contact our Webmaster
8.7 Low water levels begin to impact shipping interests along the river.

Other Real-time and/or Archive Data Sources:
Additional Information Collapse
How much forecast precipitation was used for the current river forecast?
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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