Major Flood
28 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
26 ft
Minor Flood
25 ft
Action Stage
23 ft
What Floods at Each Level
25 ft
Flooding may be occurring downstream in Ontonagon...especially during above normal lake levels or ice coverage near the mouth of 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 |
|---|---|---|
| Aug 21, 1942 | 28.6 ft | 42,000 cfs |
| Apr 30, 2013 | 21.96 ft | 27,400 cfs |
| Apr 12, 2023 | 21.64 ft | 27,100 cfs |
About This Gauge
USGS Site
NWS LID
RKLM4
River
Ontonagon River
County
Ontonagon, MI
Coordinates
46.7208°N, 89.2069°W
Get Flood Alerts for Ontonagon 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 Ontonagon River near Rockland?
The Ontonagon River near Rockland gauge is maintained by USGS (site 04040000) 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 Ontonagon River near Rockland?
The NWS-defined flood stage for Ontonagon River near Rockland is 25 feet. Action stage begins at 23 feet. Moderate flooding starts at 26 feet, and major flooding at 28 feet.
How do I get alerts when Ontonagon River rises?
Download StormCast free on Google Play, go to River Gauges, and add Ontonagon River near Rockland 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 Ontonagon River near Rockland gauge located?
The gauge is located in Ontonagon County, Michigan at coordinates 46.7208°N, 89.2069°W. USGS site number: 04040000. Data is provided by the U.S. Geological Survey and the National Weather Service.
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.