South Branch Ontonagon at Ewen
Highest listed crest 33.87 ftFlood stage 33.0 ft3 crests since 2013
The South Branch Ontonagon at Ewen crested above flood stage 3 times among the 3 crests the National Weather Service lists from 2013 to 2023. The highest, 33.87 ft on April 30, 2013, was minor flooding, 0.87 feet above flood stage.
The gauge
- Highest listed crest
- 33.87 ft
- April 30, 2013; 9,040 cubic feet per second
- Flood stage
- 33.0 ft
- Major flooding from 37.5 ft
- Crests at major
- 0
- 3 above flood stage
- Most recent flood crest
- April 14, 2023
- 33.00 ft, minor flooding
Flood stages
The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.
| Action stage | 31.5 | 0 | — |
| Flood stage (minor) | 33.0 | 3 | Apr 14, 2023 |
| Moderate flood stage | 36.5 | 0 | — |
| Major flood stage | 37.5 | 0 | — |
Every listed crest
3 crests from 2013 to 2023. Filled: at or above flood stage. Hover a crest for its date and stage.
Crests at or above flood stage, by decade
- These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
- Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.
Highest crests
| 1 | Apr 30, 2013 | 33.87 | +0.87 | Minor |
| 2 | Apr 23, 2019 | 33.00 | 0.00 | Minor |
| 3 | Apr 14, 2023 | 33.00 | 0.00 | Minor |
Other gauges in Ontonagon County
| Rockland | 28.60 ft, Aug 22, 1942 | 1 |
Ontonagon County: every hazard · River floods across the country · Michigan
NOAA National Water Prediction Service, gauge EWNM4, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.