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This probabilistic forecast is issued by the Northeast River Forecast Center.
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About this graph
Forecasts for the Pemigewasset River at Plymouth are issued routinely year-round.
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Upstream Gauge - at Woodstock Upstream Gauge
Zoom Level:16
Flood Categories (in feet)
Major Flood Stage: 21
Moderate Flood Stage: 18
Flood Stage: 13
Action Stage: 10
Low Stage (in feet): -9999

Historic Crests
(1) 29.00 ft on 03/19/1936
(2) 27.40 ft on 11/04/1927
(3) 23.62 ft on 09/21/1938
(4) 23.43 ft on 04/01/1987
(5) 22.68 ft on 10/25/1959
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 16.08 ft on 04/13/2024 (P)
(2) 13.85 ft on 03/07/2024 (P)
(3) 20.58 ft on 12/19/2023 (P)
(4) 15.18 ft on 12/24/2022
(5) 19.77 ft on 10/30/2017
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
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Gauge LocationGauge Map Marker
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
22 Flood waters 5 to 6 feet deep on route 175A in Holderness.
20.1 Flood waters rise to the doors of the PSU physical education center and the PSU ice arena.
18 South River Road and Avery Street flood in Holderness.
15.5 Flood waters over the road at the Irving station on route 175A in Holderness.
15 Flood waters up to the road at the Irving station on route 175A in Holderness.
14 Water enters the parking lot behind the PSU ice arena.
13 Minor lowland flooding begins.
(1) Gage house and staff gage

Other Real-time and/or Archive Data Sources:

Additional Information Collapse
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
10 Day (HEFS) 7 Day (NAEFS) 7 Day (GEFS)
HEFS Ensemble NAEFS Ensemble GEFS Ensemble

Note: Use the official hydrograph at the top of this web page for river levels within the next 72 hours.

Click individual graphics to enlarge.

Collaborative Agencies Collapse
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
Gray Weather Forecast Office
P.O. Box 1208, 1 Weather Lane, Route 231
Gray, ME 04039
(207) 688-3216
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Page last modified: 2-Nov-2020 7:30 PM
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