River stage
Caledonia, Thornapple River
- River level
- 3.50 ft
- Status
- Below flood stage
- 7-day change
- -0.36 ft
- Recent high
- 4.98 ft
- Recent low
- 3.08 ft
Last reported 2026-10-13 | NWS CLDM4
- 30-day change
- +0.09 ft
- Average
- 3.66 ft
- Readings
- 122
- Data span
- 122 days
- Record crest
- 14.40 ft
In brief
The Thornapple River at Caledonia, MI read 3.50 ft on Oct 13, 2026, 4.50 ft below action stage. That is 0.09 ft higher than 30 days earlier.
Source: National Weather Service gauge CLDM4
River level timeline
Stage threshold profile
Highest crests on record
| Rank | Crest | Date |
|---|---|---|
| 1 | 14.40 ft | 1947-04-07 |
| 2 | 11.79 ft | 2018-02-24 |
| 3 | 11.69 ft | 2013-04-19 |
| 4 | 11.50 ft | 2020-05-21 |
| 5 | 11.43 ft | 1985-02-27 |
| 6 | 11.35 ft | 2023-04-06 |
| 7 | 11.21 ft | 2004-05-26 |
| 8 | 10.96 ft | 1975-04-22 |
Flood crests recorded at this gauge by the National Weather Service.
What happens at each level
- 8.00 ft
River is bankfull. Expect overflow into low lying areas along the river.
- 10.00 ft
Minor flooding of low lying areas occurs.
- 11.00 ft
High water begins to impact home on island below Cascade Dam.
- 13.00 ft
Thornapple River Drive is flooded.
Written by the local National Weather Service forecast office for this exact gauge.
Frequently asked questions
Is the Thornapple River flooding at Caledonia?
No. The Thornapple River at Caledonia is at 3.5 ft, 4.5 ft below action stage.
What is the flood stage at Caledonia?
The National Weather Service sets action stage 8 ft, minor flooding 10 ft, moderate flooding 12 ft and major flooding 14 ft.
What is the highest the Thornapple River has been at Caledonia?
The highest crest on record is 14.4 ft, on 1947-04-07.
Is the Thornapple River high or low right now at Caledonia?
At 3.5 ft it is higher than 44% of readings over the last 122 days.
Stage and flood information from the NOAA National Weather Service (gauge CLDM4); daily history from the U.S. Geological Survey (site 04118000). Last reading 2026-10-13. For flood safety decisions always follow official National Weather Service warnings.