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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 Henry are issued routinely year-round.

Vertical Datum updated from NGVD29 to NAVD88 by gauge owner.

Return to Area Map

Upstream Gauge - near La Salle Upstream Gauge
Zoom Level:15
Flood Categories (in feet)
Major Flood Stage: 31
Moderate Flood Stage: 24
Flood Stage: 23
Action Stage: 22
Low Stage (in feet): -9999

Historic Crests
(1) 32.94 ft on 04/22/2013
(2) 32.67 ft on 03/22/1979
(3) 32.20 ft on 05/23/1943
(4) 32.02 ft on 03/07/1985
(5) 31.62 ft on 05/21/2020
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 25.55 ft on 01/31/2024 (P)
(2) 21.01 ft on 04/07/2023
(3) 21.33 ft on 03/09/2023 (P)
(4) 21.36 ft on 03/08/2023
(5) 21.20 ft on 05/09/2022
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
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
32.5 Illinois Route 18 in Marshall County is closed. Parts of Illinois Route 17 between Sparland and Lacon are closed.
32 Water begins flooding parts of Illinois Route 18 between Henry and Illinois Route 26. Parts of Illinois Route 17 begin to flood.
30.5 The Marina building, Waterworks Park, and grain loading facility in Henry are flooded.
29.6 A few homes begin to flood in Henry.
28.5 Hennepin levee overtopped.
28 Flooding begins to affect buildings east of Illinois Route 29 in Sparland.
23 Water begins to affect the marina in Henry along with minor flooding of land adjacent to the river.
Photos
(1) Looking Downstream (Stage: 15.45 ft)
(2) Looking Upstream (Stage: 15.45 ft)
(3) Gauge House

Other Real-time and/or Archive Data Sources:
Additional Information Collapse
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
Lincoln Weather Forecast Office
1362 State Route 10
Lincoln, IL 62656
(217) 732-3089
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