Major Flood
25 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
24 ft
Minor Flood
18 ft
Action Stage
17 ft
What Floods at Each Level
29.6 ft
Water reaches bottom of Route 52 bridge.
27 ft
Residences threatened near US-52/Main Street in Iroquois.
26.5 ft
US-52/Main Street threatened near the river in Iroquois.
26 ft
Widespread inundation of structures and roads begins in east Watseka.
25 ft
Flooding of some buildings near the river begins.
21.5 ft
County Road 1950N threatened north of Watseka.
18 ft
Agricultural areas near the river begin to flood.
Impact statements from the National Weather Service, describing what typically happens at each water level.
Low-Water Impacts
3.0
Approximate stage of the 1-in-10 annual chance flow (7-day average).
2.5
River nears zero flow.
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 |
|---|---|---|
| Jun 12, 1958 | 26.31 ft | 10,400 cfs |
| Feb 21, 2018 | 26.17 ft | 9,900 cfs |
| Jan 8, 2008 | 25.81 ft | 9,590 cfs |
About This Gauge
USGS Site
NWS LID
IRQI2
River
Iroquois River
County
Iroquois, IL
Coordinates
40.8231°N, 87.5817°W
Get Flood Alerts for Iroquois 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 Iroquois River at Iroquois?
The Iroquois River at Iroquois gauge is maintained by USGS (site 05525000) 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 Iroquois River at Iroquois?
The NWS-defined flood stage for Iroquois River at Iroquois is 18 feet. Action stage begins at 17 feet. Moderate flooding starts at 24 feet, and major flooding at 25 feet.
How do I get alerts when Iroquois River rises?
Download StormCast free on Google Play, go to River Gauges, and add Iroquois River at Iroquois 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 Iroquois River at Iroquois gauge located?
The gauge is located in Iroquois County, Illinois at coordinates 40.8231°N, 87.5817°W. USGS site number: 05525000. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Iroquois River
On This River
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Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- 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.