River stage
Henry, Illinois River
- River level
- 15.04 ft
- Status
- Below flood stage
- 7-day change
- -2.68 ft
- Recent high
- 24.19 ft
- Recent low
- 14.25 ft
Last reported 2026-10-13 | NWS HNYI2
- 30-day change
- +0.64 ft
- Average
- 17.82 ft
- Readings
- 122
- Data span
- 122 days
- Record crest
- 32.94 ft
In brief
The Illinois River at Henry, IL read 15.04 ft on Oct 13, 2026, 6.96 ft below action stage. That is 0.64 ft higher than 30 days earlier.
Source: National Weather Service gauge HNYI2
Water 69 °F (21 °C)
River level timeline
Stage threshold profile
Highest crests on record
| Rank | Crest | Date |
|---|---|---|
| 1 | 32.94 ft | 2013-04-22 |
| 2 | 32.67 ft | 1979-03-22 |
| 3 | 32.20 ft | 1943-05-23 |
| 4 | 32.02 ft | 1985-03-07 |
| 5 | 31.62 ft | 2020-05-21 |
| 6 | 31.49 ft | 2009-03-13 |
| 7 | 31.35 ft | 2019-05-06 |
| 8 | 31.25 ft | 1985-03-05 |
Flood crests recorded at this gauge by the National Weather Service.
What happens at each level
- 23.00 ft
Water begins to affect the marina in Henry along with minor flooding of land adjacent to the river.
- 28.00 ft
Flooding begins to affect buildings east of Illinois Route 29 in Sparland.
- 28.50 ft
Hennepin levee overtopped.
- 29.60 ft
A few homes begin to flood in Henry.
- 30.50 ft
The Marina building is flooded. Inundation from Waterworks Park on Cromwell Drive toward old grain elevator location on Water Street.
- 32.00 ft
Water begins flooding parts of Illinois Route 18 between Henry and Illinois Route 26. Parts of Illinois Route 17 begin to flood.
- 32.50 ft
Illinois Route 18 in Marshall County is closed. Parts of Illinois Route 17 between Sparland and Lacon are closed.
Written by the local National Weather Service forecast office for this exact gauge.
Frequently asked questions
Is the Illinois River flooding at Henry?
No. The Illinois River at Henry is at 15.04 ft, 6.96 ft below action stage.
What is the flood stage at Henry?
The National Weather Service sets action stage 22 ft, minor flooding 23 ft, moderate flooding 24 ft and major flooding 31 ft.
What is the highest the Illinois River has been at Henry?
The highest crest on record is 32.94 ft, on 2013-04-22.
Is the Illinois River high or low right now at Henry?
At 15.04 ft it is higher than 19% of readings over the last 122 days.
How warm is the water at Henry, Illinois River?
The water temperature at Henry, Illinois River is 69 °F (20.8 °C), measured 6:45 pm by USGS. It has risen 0.9 °F in the last 24 hours.
Stage and flood information from the NOAA National Weather Service (gauge HNYI2); daily history from the U.S. Geological Survey (site 05558300). Last reading 2026-10-13. For flood safety decisions always follow official National Weather Service warnings.