Major Flood
14 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
12 ft
Minor Flood
10 ft
Action Stage
8 ft
What Floods at Each Level
13 ft
Thornapple River Drive is flooded.
11 ft
High water begins to impact home on island below Cascade Dam.
10 ft
Minor flooding of low lying areas occurs.
8 ft
River is bankfull. Expect overflow into low lying areas along the river.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Apr 6, 1947 | 14.4 ft | — |
| Feb 23, 2018 | 11.79 ft | 7,560 cfs |
| Apr 19, 2013 | 11.69 ft | 7,440 cfs |
About This Gauge
Get Flood Alerts for Thornapple 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 Thornapple River at Caledonia?
The Thornapple River at Caledonia gauge is maintained by USGS (site 04118000) 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 Thornapple River at Caledonia?
The NWS-defined flood stage for Thornapple River at Caledonia is 10 feet. Action stage begins at 8 feet. Moderate flooding starts at 12 feet, and major flooding at 14 feet.
How do I get alerts when Thornapple River rises?
Download StormCast free on Google Play, go to River Gauges, and add Thornapple River at Caledonia 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 Thornapple River at Caledonia gauge located?
The gauge is located in Kent County, Michigan at coordinates 42.8111°N, 85.4834°W. USGS site number: 04118000. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Thornapple River
On This River
Upstream: Thornapple River at Hastings
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.
- River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 48 hours into the future from the forecast issuance time.
- Stage may be affected by ice during winter months.