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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 at Starved Rock Lock (tailwater) are issued routinely year-round.
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Upstream Gauge - at Ottawa Upstream Gauge Downstream Gauge Downstream Gauge - near La Salle
Zoom Level:15
Flood Categories (in feet)
Major Flood Stage: 465
Moderate Flood Stage: 460
Flood Stage: 450
Action Stage: 449
Low Stage (in feet): 438.7

Historic Crests
(1) 467.81 ft on 04/19/2013
(2) 467.31 ft on 09/16/2008
(3) 465.86 ft on 05/19/2020
(4) 464.70 ft on 12/05/1982
(5) 464.61 ft on 05/03/2019
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 465.86 ft on 05/19/2020
(2) 464.61 ft on 05/03/2019
(3) 463.65 ft on 02/22/2018
(4) 460.14 ft on 05/02/2017
(5) 461.82 ft on 12/30/2015
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 439.90 ft on 10/03/2012
(2) 440.34 ft on 10/01/2017
(3) 440.38 ft on 10/16/2015
(4) 440.78 ft on 09/28/2020
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
467.5 North Utica Village Hall and North Utica Police Department are threatened.
464.5 A few residences threatened in North Utica. IL-178 (Clark Street) threatened in North Utica.
463 A couple structures threatened in North Utica.
461.5 High water causes the Starved Rock Lock to shut down.
459 Dee Bennet Road is threatened between Ottawa and Utica.
458 High water levels begin to impact shipping interests along the river.
455 High water causes the Starved Rock Hydroelectric Power Station to shut down.
Photos
(1) Starved Rock
(2) Gates at lock and dam September 2010.
(3) Looking upstream. September 2010.
Low Water Impacts Collapse
If you notice any errors in the below information, please contact our Webmaster
438.7 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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