Arkansas River at Portland
Observed Mon, Sep 28, 4:15 AM MDT
- Flood stage
- 9.00 ft
- Record crest
- 12.94 ft2006
Flood stages and impacts
| Category | Stage |
|---|---|
| Major flood | 11.00 ft |
| Moderate flood | 10.00 ft |
| Minor flood | 9.00 ft |
| Action | 7.00 ft |
- 15.00 ftFlood waters flow into parking lot of Holcim Cement Plant.
- 12.50 ftFlood waters reach base of railroad bridge near Holcim Cement Plant.
- 11.00 ftMajor Flood Stage.
- 10.00 ftModerate Flood.
- 9.50 ftWater rises to railroad tracks on east side of Holcim Cement Plant.
- 9.00 ftMinor Flood. Considerable lowland and meadow flooding occurs.
- 8.00 ftMinor agricultural flooding occurs.
- 7.00 ftThe river is bankfull.
Flood outlook
Chance of flooding, September to November
| Category | Chance |
|---|---|
| Minor flooding | Under 5% |
| Moderate flooding | Under 5% |
| Major flooding | Under 5% |
The three-month chances are the River Forecast Centers’ long-range flood outlook, issued September 23, 2024.
Crest history
16 crests on NOAA’s list since 1975.
| # | Date | Stage |
|---|---|---|
| 1 | July 6, 2006 | 12.94 ft |
| 2 | August 2, 1976 | 11.26 ft |
| 3 | August 2, 1975 | 10.09 ft |
| 4 | September 12, 2013 | 9.46 ft |
| 5 | July 23, 1985 | 8.93 ft |
| 6 | August 12, 1991 | 8.81 ft |
| 7 | June 18, 1995 | 8.51 ft |
| 8 | June 18, 2015 | 8.09 ft |
| 9 | June 24, 1999 | 8.03 ft |
| 10 | August 17, 1992 | 8.03 ft |
| 11 | June 7, 1997 | 7.70 ft |
| 12 | July 1, 2019 | 7.52 ft |
| 13 | June 10, 2024 | 7.48 ft |
| 14 | June 6, 2010 | 7.13 ft |
| 15 | July 23, 2018 | 7.04 ft |
| 16 | June 23, 2017 | 6.43 ft |
Most recent crests
- June 10, 2024: 7.48 ft
- July 1, 2019: 7.52 ft
- July 23, 2018: 7.04 ft
- June 23, 2017: 6.43 ft
- June 18, 2015: 8.09 ft
- September 12, 2013: 9.46 ft
- June 6, 2010: 7.13 ft
- July 6, 2006: 12.94 ft
- June 24, 1999: 8.03 ft
- June 7, 1997: 7.70 ft
Nearby
Upstream, downstream and the gauges around this one.
What this means
Forecasts by the Arkansas-Red Basin RFC. 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. Stage may be affected by ice during winter months.
Sources
Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.