Illinois River at Seneca, IL
Is Illinois River at Seneca, IL flooding right now?
Illinois River at Seneca, IL measured 20.52 ft on 2026-11-11 14:45:00 UTC. No NWS minor flood stage is published for this gauge. Its action level is 26 ft; action level is not flood stage.
Gauge height
20.52 ft
Streamflow
—
The highest crest on record was 32.25 ft on Tue, May 19, 2020.
Flood stages at this gauge
| Category | Stage | Current distance |
|---|---|---|
| Action | 26 ft | 5.5 ft below |
Highest crests on record
| Stage | Date |
|---|---|
| 32.25 ft | 2020-05-19 |
| 32.16 ft | 2019-05-02 |
| 30.78 ft | 2018-02-21 |
| 27.94 ft | 2019-09-29 |
| 27.36 ft | 2017-05-02 |
Last 7 days
Nearby gauges
| Gauge | Distance | County |
|---|---|---|
| Illinois River at Marseilles, IL | 5.7 mi | LaSalle County |
| Hanson Gravel Pit at Culvert near Morris, IL | 8.0 mi | Grundy County |
| Illinois River at Morris, IL | 10.3 mi | Grundy County |
| Fox River at Dayton, IL | 10.8 mi | LaSalle County |
| Mazon River near Coal City, IL | 13.2 mi | Grundy County |
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.