Ontonagon River near Rockland, MI
River level and flood forecast · Ontonagon County
The river is 19.7 ft below flood stage (25 ft).
Flow: 508 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 7 PM. Forecasts change as rain falls and as upstream water arrives.
Get flood alerts for this river
An email when the National Weather Service forecasts Ontonagon River near Rockland to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 28 ft |
| Moderate flood stage | 26 ft |
| Flood stage | 25 ft |
| Action stage | 23 ft |
| Record crest (August 22, 1942) | 28.6 ft |
What floods at each level
From the National Weather Service, highest first.
- 25 ftFlooding may be occurring downstream in Ontonagon...especially during above normal lake levels or ice coverage near the mouth of the river.
Highest crests on record
- 28.6 ft — August 22, 1942
- 21.96 ft — May 1, 2013
- 21.64 ft — April 13, 2023
- 21.13 ft — April 23, 2019
- 20.9 ft — May 12, 2003
Recent crests: 14.41 ft (June 23, 2024) · 21.64 ft (April 13, 2023) · 17.39 ft (April 14, 2022) · 13.62 ft (March 22, 2021) · 14.23 ft (March 30, 2020)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (RKLM4); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.