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Hydrograph River at a Glance Download
Pemigewasset River at Plymouth Stage (ft)Flow (kcfs)Observed: 0.9 ft at 1:45PM Aug 18, 2017Observed: 0.91 ft at 2:00PM Aug 18, 2017Observed: 0.91 ft at 2:15PM Aug 18, 2017Observed: 0.91 ft at 2:30PM Aug 18, 2017Observed: 0.92 ft at 2:45PM Aug 18, 2017Observed: 0.92 ft at 3:00PM Aug 18, 2017Observed: 0.95 ft at 3:15PM Aug 18, 2017Observed: 0.98 ft at 3:30PM Aug 18, 2017Observed: 0.98 ft at 3:45PM Aug 18, 2017Observed: 0.98 ft at 4:00PM Aug 18, 2017Observed: 0.99 ft at 4:15PM Aug 18, 2017Observed: 0.99 ft at 4:30PM Aug 18, 2017Observed: 0.99 ft at 4:45PM Aug 18, 2017Observed: 0.99 ft at 5:00PM Aug 18, 2017Observed: 0.99 ft at 5:15PM Aug 18, 2017Observed: 0.99 ft at 5:30PM Aug 18, 2017Observed: 0.99 ft at 5:45PM Aug 18, 2017Observed: 1 ft at 6:00PM Aug 18, 2017Observed: 1 ft at 6:15PM Aug 18, 2017Observed: 1.01 ft at 6:30PM Aug 18, 2017Observed: 1.02 ft at 6:45PM Aug 18, 2017Observed: 1.03 ft at 7:00PM Aug 18, 2017Observed: 1.03 ft at 7:15PM Aug 18, 2017Observed: 1.04 ft at 7:30PM Aug 18, 2017Observed: 1.05 ft at 7:45PM Aug 18, 2017Observed: 1.05 ft at 8:00PM Aug 18, 2017Observed: 1.06 ft at 8:15PM Aug 18, 2017Observed: 1.07 ft at 8:30PM Aug 18, 2017Observed: 1.08 ft at 8:45PM Aug 18, 2017Observed: 1.09 ft at 9:00PM Aug 18, 2017Observed: 1.1 ft at 9:15PM Aug 18, 2017Observed: 1.11 ft at 9:30PM Aug 18, 2017Observed: 1.13 ft at 9:45PM Aug 18, 2017Observed: 1.14 ft at 10:00PM Aug 18, 2017Observed: 1.15 ft at 10:15PM Aug 18, 2017Observed: 1.18 ft at 10:30PM Aug 18, 2017Observed: 1.2 ft at 10:45PM Aug 18, 2017Observed: 1.21 ft at 11:00PM Aug 18, 2017Observed: 1.23 ft at 11:15PM Aug 18, 2017Observed: 1.24 ft at 11:30PM Aug 18, 2017Observed: 1.25 ft at 11:45PM Aug 18, 2017Observed: 1.27 ft at 12:00AM Aug 19, 2017Observed: 1.29 ft at 12:15AM Aug 19, 2017Observed: 1.3 ft at 12:30AM Aug 19, 2017Observed: 1.31 ft at 12:45AM Aug 19, 2017Observed: 1.32 ft at 1:00AM Aug 19, 2017Observed: 1.33 ft at 1:15AM Aug 19, 2017Observed: 1.34 ft at 1:30AM Aug 19, 2017Observed: 1.36 ft at 1:45AM Aug 19, 2017Observed: 1.37 ft at 2:00AM Aug 19, 2017Observed: 1.37 ft at 2:15AM Aug 19, 2017Observed: 1.38 ft at 2:30AM Aug 19, 2017Observed: 1.39 ft at 2:45AM Aug 19, 2017Observed: 1.4 ft at 3:00AM Aug 19, 2017Observed: 1.4 ft at 3:15AM Aug 19, 2017Observed: 1.41 ft at 3:30AM Aug 19, 2017Observed: 1.41 ft at 3:45AM Aug 19, 2017Highest Observation: 1.42 ft at 4:00AM Aug 19, 2017Highest Observation: 1.42 ft at 4:15AM Aug 19, 2017Highest Observation: 1.42 ft at 4:30AM Aug 19, 2017Highest Observation: 1.42 ft at 4:45AM Aug 19, 2017Highest Observation: 1.42 ft at 5:00AM Aug 19, 2017Highest Observation: 1.42 ft at 5:15AM Aug 19, 2017Highest Observation: 1.42 ft at 5:30AM Aug 19, 2017Highest Observation: 1.42 ft at 5:45AM Aug 19, 2017Highest Observation: 1.42 ft at 6:00AM Aug 19, 2017Highest Observation: 1.42 ft at 6:15AM Aug 19, 2017Highest Observation: 1.42 ft at 6:30AM Aug 19, 2017Highest Observation: 1.42 ft at 6:45AM Aug 19, 2017Highest Observation: 1.42 ft at 7:00AM Aug 19, 2017Highest Observation: 1.42 ft at 7:15AM Aug 19, 2017Highest Observation: 1.42 ft at 7:30AM Aug 19, 2017Highest Observation: 1.42 ft at 7:45AM Aug 19, 2017Highest Observation: 1.42 ft at 8:00AM Aug 19, 2017Highest Observation: 1.42 ft at 8:15AM Aug 19, 2017Highest Observation: 1.42 ft at 8:30AM Aug 19, 2017Highest Observation: 1.42 ft at 8:45AM Aug 19, 2017Highest Observation: 1.42 ft at 9:00AM Aug 19, 2017Highest Observation: 1.42 ft at 9:15AM Aug 19, 2017Highest Observation: 1.42 ft at 9:30AM Aug 19, 2017Highest Observation: 1.42 ft at 9:45AM Aug 19, 2017Highest Observation: 1.42 ft at 10:00AM Aug 19, 2017Highest Observation: 1.42 ft at 10:15AM Aug 19, 2017Highest Observation: 1.42 ft at 10:30AM Aug 19, 2017Observed: 1.41 ft at 10:45AM Aug 19, 2017Observed: 1.41 ft at 11:00AM Aug 19, 2017Observed: 1.41 ft at 11:15AM Aug 19, 2017Observed: 1.41 ft at 11:30AM Aug 19, 2017Observed: 1.4 ft at 11:45AM Aug 19, 2017Observed: 1.4 ft at 12:00PM Aug 19, 2017Observed: 1.4 ft at 12:15PM Aug 19, 2017Observed: 1.4 ft at 12:30PM Aug 19, 2017Observed: 1.39 ft at 12:45PM Aug 19, 2017Observed: 1.39 ft at 1:00PM Aug 19, 2017Observed: 1.39 ft at 1:15PM Aug 19, 2017Observed: 1.38 ft at 1:30PM Aug 19, 2017Observed: 1.38 ft at 1:45PM Aug 19, 2017Observed: 1.38 ft at 2:00PM Aug 19, 2017Observed: 1.38 ft at 2:15PM Aug 19, 2017Observed: 1.37 ft at 2:30PM Aug 19, 2017Observed: 1.37 ft at 2:45PM Aug 19, 2017Observed: 1.36 ft at 3:00PM Aug 19, 2017Observed: 1.36 ft at 3:15PM Aug 19, 2017Observed: 1.36 ft at 3:30PM Aug 19, 2017Observed: 1.35 ft at 3:45PM Aug 19, 2017Observed: 1.35 ft at 4:00PM Aug 19, 2017Observed: 1.35 ft at 4:15PM Aug 19, 2017Observed: 1.35 ft at 4:30PM Aug 19, 2017Observed: 1.34 ft at 4:45PM Aug 19, 2017Observed: 1.34 ft at 5:00PM Aug 19, 2017Observed: 1.34 ft at 5:15PM Aug 19, 2017Observed: 1.34 ft at 5:30PM Aug 19, 2017Observed: 1.33 ft at 5:45PM Aug 19, 2017Observed: 1.33 ft at 6:00PM Aug 19, 2017Observed: 1.33 ft at 6:15PM Aug 19, 2017Observed: 1.33 ft at 6:30PM Aug 19, 2017Observed: 1.32 ft at 6:45PM Aug 19, 2017Observed: 1.32 ft at 7:00PM Aug 19, 2017Observed: 1.32 ft at 7:15PM Aug 19, 2017Observed: 1.32 ft at 7:30PM Aug 19, 2017Observed: 1.32 ft at 7:45PM Aug 19, 2017Observed: 1.32 ft at 8:00PM Aug 19, 2017Observed: 1.31 ft at 8:15PM Aug 19, 2017Observed: 1.31 ft at 8:30PM Aug 19, 2017Observed: 1.31 ft at 8:45PM Aug 19, 2017Observed: 1.31 ft at 9:00PM Aug 19, 2017Observed: 1.3 ft at 9:15PM Aug 19, 2017Observed: 1.3 ft at 9:30PM Aug 19, 2017Observed: 1.3 ft at 9:45PM Aug 19, 2017Observed: 1.3 ft at 10:00PM Aug 19, 2017Observed: 1.3 ft at 10:15PM Aug 19, 2017Observed: 1.3 ft at 10:30PM Aug 19, 2017Observed: 1.29 ft at 10:45PM Aug 19, 2017Observed: 1.29 ft at 11:00PM Aug 19, 2017Observed: 1.29 ft at 11:15PM Aug 19, 2017Observed: 1.28 ft at 11:30PM Aug 19, 2017Observed: 1.28 ft at 11:45PM Aug 19, 2017Observed: 1.28 ft at 12:00AM Aug 20, 2017Observed: 1.28 ft at 12:15AM Aug 20, 2017Observed: 1.28 ft at 12:30AM Aug 20, 2017Observed: 1.27 ft at 12:45AM Aug 20, 2017Observed: 1.27 ft at 1:00AM Aug 20, 2017Observed: 1.27 ft at 1:15AM Aug 20, 2017Observed: 1.26 ft at 1:30AM Aug 20, 2017Observed: 1.26 ft at 1:45AM Aug 20, 2017Observed: 1.26 ft at 2:00AM Aug 20, 2017Observed: 1.26 ft at 2:15AM Aug 20, 2017Observed: 1.25 ft at 2:30AM Aug 20, 2017Observed: 1.25 ft at 2:45AM Aug 20, 2017Observed: 1.25 ft at 3:00AM Aug 20, 2017Observed: 1.24 ft at 3:15AM Aug 20, 2017Observed: 1.24 ft at 3:30AM Aug 20, 2017Observed: 1.24 ft at 3:45AM Aug 20, 2017Observed: 1.24 ft at 4:00AM Aug 20, 2017Observed: 1.24 ft at 4:15AM Aug 20, 2017Observed: 1.23 ft at 4:30AM Aug 20, 2017Observed: 1.23 ft at 4:45AM Aug 20, 2017Observed: 1.23 ft at 5:00AM Aug 20, 2017Observed: 1.23 ft at 5:15AM Aug 20, 2017Observed: 1.22 ft at 5:30AM Aug 20, 2017Observed: 1.22 ft at 5:45AM Aug 20, 2017Observed: 1.22 ft at 6:00AM Aug 20, 2017Observed: 1.22 ft at 6:15AM Aug 20, 2017Observed: 1.22 ft at 6:30AM Aug 20, 2017Observed: 1.21 ft at 6:45AM Aug 20, 2017Observed: 1.21 ft at 7:00AM Aug 20, 2017Observed: 1.21 ft at 7:15AM Aug 20, 2017Observed: 1.2 ft at 7:30AM Aug 20, 2017Observed: 1.2 ft at 7:45AM Aug 20, 2017Observed: 1.2 ft at 8:00AM Aug 20, 2017Observed: 1.2 ft at 8:15AM Aug 20, 2017Observed: 1.2 ft at 8:30AM Aug 20, 2017Observed: 1.19 ft at 8:45AM Aug 20, 2017Observed: 1.19 ft at 9:00AM Aug 20, 2017Observed: 1.19 ft at 9:15AM Aug 20, 2017Observed: 1.18 ft at 9:30AM Aug 20, 2017Observed: 1.18 ft at 9:45AM Aug 20, 2017Observed: 1.18 ft at 10:00AM Aug 20, 2017Observed: 1.18 ft at 10:15AM Aug 20, 2017Observed: 1.17 ft at 10:30AM Aug 20, 2017Observed: 1.17 ft at 10:45AM Aug 20, 2017Observed: 1.17 ft at 11:00AM Aug 20, 2017Observed: 1.17 ft at 11:15AM Aug 20, 2017Observed: 1.16 ft at 11:30AM Aug 20, 2017Observed: 1.16 ft at 11:45AM Aug 20, 2017Observed: 1.16 ft at 12:00PM Aug 20, 2017Observed: 1.15 ft at 12:15PM Aug 20, 2017Observed: 1.15 ft at 12:30PM Aug 20, 2017Observed: 1.15 ft at 12:45PM Aug 20, 2017Observed: 1.15 ft at 1:00PM Aug 20, 2017Observed: 1.14 ft at 1:15PM Aug 20, 2017Observed: 1.14 ft at 1:30PM Aug 20, 2017Observed: 1.14 ft at 1:45PM Aug 20, 2017Observed: 1.14 ft at 2:00PM Aug 20, 2017Observed: 1.14 ft at 2:15PM Aug 20, 2017Observed: 1.13 ft at 2:30PM Aug 20, 2017Observed: 1.13 ft at 2:45PM Aug 20, 2017Observed: 1.12 ft at 3:00PM Aug 20, 2017Observed: 1.13 ft at 3:15PM Aug 20, 2017Observed: 1.12 ft at 3:30PM Aug 20, 2017Observed: 1.12 ft at 3:45PM Aug 20, 2017Observed: 1.12 ft at 4:00PM Aug 20, 2017Observed: 1.12 ft at 4:15PM Aug 20, 2017Observed: 1.11 ft at 4:30PM Aug 20, 2017Observed: 1.11 ft at 4:45PM Aug 20, 2017Observed: 1.11 ft at 5:00PM Aug 20, 2017Observed: 1.11 ft at 5:15PM Aug 20, 2017Observed: 1.1 ft at 5:30PM Aug 20, 2017Observed: 1.1 ft at 5:45PM Aug 20, 2017Observed: 1.1 ft at 6:00PM Aug 20, 2017Observed: 1.1 ft at 6:15PM Aug 20, 2017Observed: 1.1 ft at 6:30PM Aug 20, 2017Observed: 1.1 ft at 6:45PM Aug 20, 2017Observed: 1.1 ft at 7:00PM Aug 20, 2017Observed: 1.1 ft at 7:15PM Aug 20, 2017Observed: 1.1 ft at 7:30PM Aug 20, 2017Observed: 1.09 ft at 7:45PM Aug 20, 2017Observed: 1.09 ft at 8:00PM Aug 20, 2017Observed: 1.09 ft at 8:15PM Aug 20, 2017Observed: 1.09 ft at 8:30PM Aug 20, 2017Observed: 1.08 ft at 8:45PM Aug 20, 2017Observed: 1.08 ft at 9:00PM Aug 20, 2017Observed: 1.08 ft at 9:15PM Aug 20, 2017Observed: 1.08 ft at 9:30PM Aug 20, 2017Observed: 1.08 ft at 9:45PM Aug 20, 2017Observed: 1.07 ft at 10:00PM Aug 20, 2017Observed: 1.07 ft at 10:15PM Aug 20, 2017Observed: 1.07 ft at 10:30PM Aug 20, 2017Observed: 1.07 ft at 10:45PM Aug 20, 2017Observed: 1.07 ft at 11:00PM Aug 20, 2017Observed: 1.06 ft at 11:15PM Aug 20, 2017Observed: 1.06 ft at 11:30PM Aug 20, 2017Observed: 1.06 ft at 11:45PM Aug 20, 2017Observed: 1.06 ft at 12:00AM Aug 21, 2017Observed: 1.06 ft at 12:15AM Aug 21, 2017Observed: 1.06 ft at 12:30AM Aug 21, 2017Observed: 1.06 ft at 12:45AM Aug 21, 2017Observed: 1.05 ft at 1:00AM Aug 21, 2017Observed: 1.05 ft at 1:15AM Aug 21, 2017Observed: 1.05 ft at 1:30AM Aug 21, 2017Observed: 1.05 ft at 1:45AM Aug 21, 2017Observed: 1.05 ft at 2:00AM Aug 21, 2017Observed: 1.04 ft at 2:15AM Aug 21, 2017Observed: 1.04 ft at 2:30AM Aug 21, 2017Observed: 1.04 ft at 2:45AM Aug 21, 2017Observed: 1.04 ft at 3:00AM Aug 21, 2017Observed: 1.04 ft at 3:15AM Aug 21, 2017Observed: 1.04 ft at 3:30AM Aug 21, 2017Observed: 1.03 ft at 3:45AM Aug 21, 2017Observed: 1.03 ft at 4:00AM Aug 21, 2017Observed: 1.03 ft at 4:15AM Aug 21, 2017Observed: 1.03 ft at 4:30AM Aug 21, 2017Observed: 1.03 ft at 4:45AM Aug 21, 2017Observed: 1.03 ft at 5:00AM Aug 21, 2017Observed: 1.02 ft at 5:15AM Aug 21, 2017Observed: 1.02 ft at 5:30AM Aug 21, 2017Observed: 1.02 ft at 5:45AM Aug 21, 2017Observed: 1.02 ft at 6:00AM Aug 21, 2017Observed: 1.02 ft at 6:15AM Aug 21, 2017Observed: 1.02 ft at 6:30AM Aug 21, 2017Observed: 1.02 ft at 6:45AM Aug 21, 2017Observed: 1.02 ft at 7:00AM Aug 21, 2017Observed: 1.02 ft at 7:15AM Aug 21, 2017Observed: 1.01 ft at 7:30AM Aug 21, 2017Observed: 1.01 ft at 7:45AM Aug 21, 2017Observed: 1.01 ft at 8:00AM Aug 21, 2017Observed: 1.01 ft at 8:15AM Aug 21, 2017Observed: 1.01 ft at 8:30AM Aug 21, 2017Observed: 1.01 ft at 8:45AM Aug 21, 2017Observed: 1 ft at 9:00AM Aug 21, 2017Observed: 1 ft at 9:15AM Aug 21, 2017Observed: 1 ft at 9:30AM Aug 21, 2017Observed: 1 ft at 9:45AM Aug 21, 2017Observed: 1 ft at 10:00AM Aug 21, 2017Observed: 1 ft at 10:15AM Aug 21, 2017Observed: 1 ft at 10:30AM Aug 21, 2017Observed: 1 ft at 10:45AM Aug 21, 2017Observed: 0.99 ft at 11:00AM Aug 21, 2017Observed: 0.99 ft at 11:15AM Aug 21, 2017Observed: 0.99 ft at 11:30AM Aug 21, 2017Observed: 0.99 ft at 11:45AM Aug 21, 2017Observed: 0.99 ft at 12:00PM Aug 21, 2017Observed: 0.98 ft at 12:15PM Aug 21, 2017Observed: 0.98 ft at 12:30PM Aug 21, 2017Forecast: 1 ft 2:00PM Aug 21, 2017Forecast: 0.9 ft 8:00PM Aug 21, 2017Forecast: 0.9 ft 2:00AM Aug 22, 2017Forecast: 0.9 ft 8:00AM Aug 22, 2017Forecast: 0.9 ft 2:00PM Aug 22, 2017Forecast: 0.9 ft 8:00PM Aug 22, 2017Forecast: 0.9 ft 2:00AM Aug 23, 2017Forecast: 1 ft 8:00AM Aug 23, 2017Forecast: 1.2 ft 2:00PM Aug 23, 2017Highest Forecast: 1.3 ft 8:00PM Aug 23, 2017Highest Forecast: 1.3 ft 2:00AM Aug 24, 2017Forecast: 1.2 ft 8:00AM Aug 24, 2017USGS--Water Resources of the United StatesPLMN3(plotting HGIRG) Graph Created (1:35PM Aug 21, 2017)ObservedForecast (issued 11:16AM Aug 21)Latest observed value: 0.98 ft at 12:30 PM EDT 21-Aug-2017. Flood Stage is 13 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Gauge reading may be affected by ice. Forecast flows are unadjusted for ice.

NOTE: Forecasts for the Pemigewasset River at Plymouth are issued routinely year-round.

Return to Area Map
Upstream Gauge - at Woodstock Upstream Gauge
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) 21.69 ft on 08/29/2011
(2) 13.38 ft on 04/29/2008
(3) 13.55 ft on 10/29/2006
(4) 14.25 ft on 10/09/2005
(5) 14.73 ft on 04/24/2005
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to www.floodsmart.gov.

Zoom Level:16
KML Image
Gauge LocationGauge Map Marker
Disclaimer
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 5 to 6 feet of water on route 175A in Holderness
20.1 Water at the doors of the PSU physical education center. Water at the doors of the PSU ice arena
18 South River Road and Avery Street flooded in Holderness
15.5 Water over the road at Irving station on route 175A in Holderness
15 Water up to road at Irving station on route 175A in Holderness
14 Water entering parking lot behind PSU ice arena
13 Minor lowland flooding
About This Location Collapse

Latitude: 43.759239° N, Longitude: 71.685600° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 13 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
Elevation
(gauge height = flood stage)
Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 457.07 ft 470.07 ft Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  

Current/Historical Observations:

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

Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics. 

Click individual graphics to enlarge.

Resources Collapse
Hydrologic Resources Additional Resources
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: 21-Dec-2016 10:38 PM
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