Osage River at Mari-Osa Campground
Flood stages and impacts
| Category | Stage |
|---|---|
| Major flood | 25.00 ft |
| Moderate flood | 22.00 ft |
| Minor flood | 19.00 ft |
| Action | 17.00 ft |
- 28.50 ftA multi-story home across the river and downstream from the gage will begin flooding near this height.
- 27.00 ftNumerous campsites, garages, and sheds on both sides of the river become flooded near this height.
- 25.40 ftA house directly across the river from the gage begins flooding near this height.
- 25.00 ftAcross the Maries River from the gage, considerable cropland becomes inundated. This flooding probably begins between 20 and 23 feet.
- 24.00 ftA storage shed across the river and downstream of the gage begins flooding near this height. Also, lower driveways across the river begin flooding near this height.
- 22.00 ftA storage shed across the river from the gage begins flooding near this height.
- 20.00 ftNear this stage the lowest two campsites at Mari-Osa campground begin flooding.
Flood outlook
Chance of flooding, September to November
| Category | Chance |
|---|---|
| Minor flooding | 17% |
| Moderate flooding | 8% |
| Major flooding | Under 5% |
The three-month chances are the River Forecast Centers’ long-range flood outlook, issued September 23, 2026.
Crest history
19 crests on NOAA’s list since 2015.
| # | Date | Stage |
|---|---|---|
| 1 | December 29, 2015 | 30.30 ft |
| 2 | June 6, 2019 | 30.20 ft |
| 3 | May 4, 2017 | 27.90 ft |
| 4 | June 28, 2021 | 23.00 ft |
| 5 | March 19, 2021 | 22.80 ft |
| 6 | January 11, 2020 | 22.50 ft |
| 7 | March 31, 2019 | 22.50 ft |
| 8 | December 18, 2015 | 22.10 ft |
| 9 | May 30, 2020 | 21.60 ft |
| 10 | April 30, 2024 | 21.50 ft |
| 11 | October 11, 2019 | 21.40 ft |
| 12 | March 20, 2020 | 21.20 ft |
| 13 | May 31, 2016 | 20.70 ft |
| 14 | October 13, 2018 | 20.30 ft |
| 15 | June 10, 2020 | 20.30 ft |
| 16 | April 12, 2021 | 20.30 ft |
| 17 | September 2, 2019 | 20.10 ft |
| 18 | March 23, 2020 | 19.50 ft |
| 19 | June 5, 2020 | 19.00 ft |
Most recent crests
- April 30, 2024: 21.50 ft
- June 28, 2021: 23.00 ft
- April 12, 2021: 20.30 ft
- March 19, 2021: 22.80 ft
- June 10, 2020: 20.30 ft
- June 5, 2020: 19.00 ft
- May 30, 2020: 21.60 ft
- March 23, 2020: 19.50 ft
- March 20, 2020: 21.20 ft
- January 11, 2020: 22.50 ft
Nearby
Upstream, downstream and the gauges around this one.
What this means
Forecasts by the Missouri Basin River Forecast Center. Forecasts are issued as needed during times of high water, but are not routinely available. 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.
Sources
Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service.