Rivers in New Hampshire
Pemigewasset River at Plymouth
Below flood stage
0.62ftStage
Observed Thu, Sep 24, 3:30 AM EDT
- Flood stage
- 13.00 ft
- Forecast crest
- 0.60 ftThu, Sep 24, 8:00 AM EDT
- Record crest
- 29.00 ft1936
Flood stages and impacts
| Category | Stage |
|---|---|
| Major flood | 21.00 ft |
| Moderate flood | 18.00 ft |
| Minor flood | 13.00 ft |
| Action | 10.00 ft |
- 22.00 ftFlood waters 5 to 6 feet deep on route 175A in Holderness.
- 20.10 ftFlood waters rise to the doors of the PSU physical education center and the PSU ice arena.
- 18.00 ftSouth River Road and Avery Street flood in Holderness.
- 15.50 ftFlood waters over the road at the Irving station on route 175A in Holderness.
- 15.00 ftFlood waters up to the road at the Irving station on route 175A in Holderness.
- 14.00 ftWater enters the parking lot behind the PSU ice arena.
- 13.00 ftMinor lowland flooding begins.
Flood outlook
Chance of flooding, September to November
| Category | Chance |
|---|---|
| Minor flooding | 11% |
| Moderate flooding | 8% |
| Major flooding | Under 5% |
The three-month chances are the River Forecast Centers’ long-range flood outlook, issued September 21, 2026.
Crest history
67 crests on NOAA’s list since 1907.
| # | Date | Stage |
|---|---|---|
| 1 | March 19, 1936 | 29.00 ft |
| 2 | November 4, 1927 | 27.40 ft |
| 3 | September 21, 1938 | 23.62 ft |
| 4 | April 1, 1987 | 23.43 ft |
| 5 | October 25, 1959 | 22.68 ft |
| 6 | July 1, 1973 | 22.33 ft |
| 7 | August 29, 2011 | 21.69 ft |
| 8 | March 27, 1953 | 21.20 ft |
| 9 | December 22, 1973 | 20.61 ft |
| 10 | December 19, 2023 | 20.58 ft |
| 11 | January 27, 1986 | 20.28 ft |
| 12 | March 14, 1977 | 20.06 ft |
| 13 | December 21, 1973 | 20.05 ft |
| 14 | February 12, 1981 | 20.01 ft |
| 15 | October 30, 2017 | 19.77 ft |
| 16 | April 29, 1923 | 18.60 ft |
| 17 | April 20, 1914 | 17.50 ft |
| 18 | December 21, 1957 | 17.15 ft |
| 19 | April 9, 2000 | 16.41 ft |
| 20 | July 2, 2017 | 16.21 ft |
| 21 | April 13, 2024 | 16.08 ft |
| 22 | April 6, 1984 | 16.05 ft |
| 23 | March 28, 1913 | 16.00 ft |
| 24 | December 18, 2000 | 15.99 ft |
| 25 | March 29, 1925 | 15.95 ft |
Most recent crests
- April 13, 2024: 16.08 ft
- March 7, 2024: 13.85 ft
- December 19, 2023: 20.58 ft
- December 24, 2022: 15.18 ft
- October 30, 2017: 19.77 ft
- July 2, 2017: 16.21 ft
- August 29, 2011: 21.69 ft
- April 29, 2008: 13.38 ft
- October 29, 2006: 13.55 ft
- October 9, 2005: 14.25 ft
Nearby
Upstream, downstream and the gauges around this one.
What this means
Forecasts by the Northeast River Forecast Center. Forecasts are issued routinely year-round.
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.