Major Flood
31 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
27 ft
Minor Flood
20 ft
Action Stage
19 ft
What Floods at Each Level
34.5 ft
North Utica Village Hall, police department, and wastewater treatment plant property are threatened.
33 ft
A couple structures are threatened near the river in downtown La Salle.
32 ft
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 ft
A couple structures threatened in North Utica.
30 ft
La Salle water pumping station property is threatened.
28.5 ft
Water Street is threatened in Peru.
28 ft
Dee Bennet Road is threatened between Ottawa and Utica.
22 ft
Lower 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 ft
Agricultural areas in La Salle, Spring Valley, and Peru are inundated.
17.5 ft
Low-lying agricultural land near the river is inundated.
Impact statements from the National Weather Service, describing what typically happens at each water level.
Low-Water Impacts
8.7
Low water levels begin to impact shipping interests along the river.
What happens as water levels drop, per the National Weather Service.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Apr 19, 2013 | 34.44 ft | — |
| Sep 15, 2008 | 33.79 ft | — |
| May 19, 2020 | 33.14 ft | — |
About This Gauge
USGS Site
NWS LID
LSLI2
River
Illinois River
County
La Salle, IL
Coordinates
41.3236°N, 89.1108°W
Get Flood Alerts for Illinois River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Illinois River near La Salle?
The Illinois River near La Salle gauge is maintained by USGS (site 411925089063901) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Illinois River near La Salle?
The NWS-defined flood stage for Illinois River near La Salle is 20 feet. Action stage begins at 19 feet. Moderate flooding starts at 27 feet, and major flooding at 31 feet.
How do I get alerts when Illinois River rises?
Download StormCast free on Google Play, go to River Gauges, and add Illinois River near La Salle to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Illinois River near La Salle gauge located?
The gauge is located in La Salle County, Illinois at coordinates 41.3236°N, 89.1108°W. USGS site number: 411925089063901. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Illinois River
On This River
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Source & Notes
Data provided by: Observations courtesy of U.S. Geological Survey, Observations courtesy of U.S. Army Corps of Engineers
- 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.