Des Plaines River near Lemont, IL
Is Des Plaines River near Lemont, IL flooding right now?
Des Plaines River near Lemont, IL measured 9.05 ft on 2026-09-22 21:00:00 UTC. That observation was 0.9 ft below its 10 ft flood stage. This is the latest available reading, not a guarantee of current conditions.
Gauge height
9.05 ft
Streamflow
2,800 cfs
Minor flooding here begins at 10 ft, with major flooding at 15 ft. The highest crest on record was 13.24 ft on Mon, May 18, 2020.
Flood forecast
Flood stages at this gauge
| Category | Stage | Current distance |
|---|---|---|
| Action | 9.5 ft | 0.4 ft below |
| Minor flood | 10 ft | 0.9 ft below |
| Moderate flood | 13 ft | 3.9 ft below |
| Major flood | 15 ft | 5.9 ft below |
Highest crests on record
| Stage | Date |
|---|---|
| 13.24 ft | 2020-05-18 |
| 12.58 ft | 2013-04-19 |
| 12.41 ft | 2017-10-15 |
| 12.3 ft | 1957-07-14 |
| 12.2 ft | 2008-09-15 |
Nearby gauges
| Gauge | Distance | County |
|---|---|---|
| Chicago Sanitary and Ship Canal at Lemont, IL | 1.5 mi | Cook County |
| Long Run near Lemont, IL | 2.5 mi | Cook County |
| Chicago Sanitary and Ship Canal at Romeoville, IL | 2.8 mi | Will County |
| Des Plaines River at Romeoville, IL | 3.0 mi | Will County |
| Chicago Sanitary and Ship Canal near Lemont, IL | 3.6 mi | DuPage County |
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Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.