Illinois River near La Salle
Observed Wed, Sep 23, 1:45 AM CDT
- Flood stage
- 20.00 ft
- Forecast crest
- 16.20 ftWed, Sep 23, 7:00 AM CDT
- Record crest
- 34.44 ft2013
Flood stages and impacts
| Category | Stage |
|---|---|
| Major flood | 31.00 ft |
| Moderate flood | 27.00 ft |
| Minor flood | 20.00 ft |
| Action | 19.00 ft |
- 34.50 ftNorth Utica Village Hall, police department, and wastewater treatment plant property are threatened.
- 33.00 ftA couple structures are threatened near the river in downtown La Salle.
- 32.00 ftNumerous 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.
- 31.00 ftA couple structures threatened in North Utica.
- 30.00 ftLa Salle water pumping station property is threatened.
- 28.50 ftWater Street is threatened in Peru.
- 28.00 ftDee Bennet Road is threatened between Ottawa and Utica.
- 22.00 ftLower parking lot at Starved Rock State Park is inundated east of La Salle. High water levels begin to impact shipping interests along the river.
- 20.00 ftAgricultural areas in La Salle, Spring Valley, and Peru are inundated.
- 17.50 ftLow-lying agricultural land near the river is inundated.
Flood outlook
Chance of flooding, September to November
| Category | Chance |
|---|---|
| Minor flooding | 44% |
| Moderate flooding | 14% |
| Major flooding | 10% |
The three-month chances are the River Forecast Centers’ long-range flood outlook, issued August 28, 2026.
Crest history
62 crests on NOAA’s list since 1869.
| # | Date | Stage |
|---|---|---|
| 1 | April 20, 2013 | 34.44 ft |
| 2 | September 16, 2008 | 33.79 ft |
| 3 | May 20, 2020 | 33.14 ft |
| 4 | May 3, 2019 | 32.14 ft |
| 5 | December 5, 1982 | 32.05 ft |
| 6 | March 12, 2009 | 32.02 ft |
| 7 | March 21, 1979 | 31.75 ft |
| 8 | March 6, 1985 | 31.70 ft |
| 9 | May 22, 1943 | 31.00 ft |
| 10 | February 23, 1997 | 30.83 ft |
| 11 | February 23, 2018 | 30.61 ft |
| 12 | August 26, 2007 | 30.34 ft |
| 13 | January 22, 1916 | 30.20 ft |
| 14 | May 16, 1970 | 30.10 ft |
| 15 | December 31, 2015 | 29.73 ft |
| 16 | November 29, 1990 | 29.27 ft |
| 17 | March 27, 1904 | 29.20 ft |
| 18 | June 24, 2015 | 28.98 ft |
| 19 | January 15, 2005 | 28.94 ft |
| 20 | May 14, 2002 | 28.86 ft |
| 21 | March 8, 1908 | 28.80 ft |
| 22 | April 26, 1950 | 28.70 ft |
| 23 | January 21, 1907 | 28.60 ft |
| 24 | May 10, 1998 | 28.14 ft |
| 25 | March 29, 1913 | 28.00 ft |
Most recent crests
- May 20, 2020: 33.14 ft
- May 1, 2020: 26.54 ft
- January 13, 2020: 23.69 ft
- November 1, 2019: 24.56 ft
- September 30, 2019: 26.77 ft
- July 5, 2019: 21.89 ft
- May 3, 2019: 32.14 ft
- March 16, 2019: 22.29 ft
- February 9, 2019: 24.59 ft
- February 23, 2018: 30.61 ft
Nearby
Upstream, downstream and the gauges around this one.
What this means
Forecasts by the North Central River Forecast Center. Forecasts are issued routinely year-round. River forecasts for this location take into account past and future precipitation. The stages/flows that will occur may be different if future rainfall is different than forecast. River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.
Sources
Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.