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Hydrograph River at a Glance Download
Contoocook River at Henniker Stage (ft)Flow (kcfs)Observed: 7.25 ft at 6:45PM Sep 24, 2021Observed: 7.32 ft at 7:00PM Sep 24, 2021Observed: 7.32 ft at 7:15PM Sep 24, 2021Observed: 7.35 ft at 7:30PM Sep 24, 2021Observed: 7.36 ft at 7:45PM Sep 24, 2021Observed: 7.35 ft at 8:00PM Sep 24, 2021Observed: 7.43 ft at 8:15PM Sep 24, 2021Observed: 7.46 ft at 8:30PM Sep 24, 2021Observed: 7.44 ft at 8:45PM Sep 24, 2021Observed: 7.46 ft at 9:00PM Sep 24, 2021Observed: 7.49 ft at 9:15PM Sep 24, 2021Observed: 7.48 ft at 9:30PM Sep 24, 2021Observed: 7.51 ft at 9:45PM Sep 24, 2021Observed: 7.53 ft at 10:00PM Sep 24, 2021Observed: 7.56 ft at 10:15PM Sep 24, 2021Observed: 7.56 ft at 10:16PM Sep 24, 2021Observed: 7.57 ft at 10:30PM Sep 24, 2021Observed: 7.57 ft at 10:45PM Sep 24, 2021Observed: 7.62 ft at 11:00PM Sep 24, 2021Observed: 7.62 ft at 11:15PM Sep 24, 2021Observed: 7.64 ft at 11:30PM Sep 24, 2021Observed: 7.66 ft at 11:45PM Sep 24, 2021Observed: 7.66 ft at 12:00AM Sep 25, 2021Observed: 7.65 ft at 12:15AM Sep 25, 2021Observed: 7.7 ft at 12:30AM Sep 25, 2021Observed: 7.67 ft at 12:45AM Sep 25, 2021Observed: 7.7 ft at 1:00AM Sep 25, 2021Observed: 7.72 ft at 1:15AM Sep 25, 2021Observed: 7.71 ft at 1:30AM Sep 25, 2021Observed: 7.72 ft at 1:45AM Sep 25, 2021Observed: 7.74 ft at 2:00AM Sep 25, 2021Observed: 7.74 ft at 2:15AM Sep 25, 2021Observed: 7.79 ft at 2:30AM Sep 25, 2021Observed: 7.76 ft at 2:45AM Sep 25, 2021Observed: 7.8 ft at 3:00AM Sep 25, 2021Observed: 7.78 ft at 3:15AM Sep 25, 2021Observed: 7.81 ft at 3:30AM Sep 25, 2021Observed: 7.81 ft at 3:45AM Sep 25, 2021Observed: 7.79 ft at 4:00AM Sep 25, 2021Highest Observation: 7.82 ft at 4:15AM Sep 25, 2021Highest Observation: 7.82 ft at 4:16AM Sep 25, 2021Observed: 7.8 ft at 4:30AM Sep 25, 2021Observed: 7.79 ft at 4:45AM Sep 25, 2021Observed: 7.79 ft at 5:00AM Sep 25, 2021Observed: 7.76 ft at 5:15AM Sep 25, 2021Observed: 7.75 ft at 5:30AM Sep 25, 2021Observed: 7.76 ft at 5:45AM Sep 25, 2021Observed: 7.76 ft at 6:00AM Sep 25, 2021Observed: 7.74 ft at 6:15AM Sep 25, 2021Observed: 7.71 ft at 6:30AM Sep 25, 2021Observed: 7.73 ft at 6:45AM Sep 25, 2021Observed: 7.74 ft at 7:00AM Sep 25, 2021Observed: 7.76 ft at 7:15AM Sep 25, 2021Observed: 7.75 ft at 7:30AM Sep 25, 2021Observed: 7.72 ft at 7:45AM Sep 25, 2021Observed: 7.72 ft at 8:00AM Sep 25, 2021Observed: 7.71 ft at 8:15AM Sep 25, 2021Observed: 7.7 ft at 8:30AM Sep 25, 2021Observed: 7.72 ft at 8:45AM Sep 25, 2021Observed: 7.73 ft at 9:00AM Sep 25, 2021Observed: 7.73 ft at 9:15AM Sep 25, 2021Observed: 7.73 ft at 9:30AM Sep 25, 2021Observed: 7.73 ft at 9:45AM Sep 25, 2021Observed: 7.73 ft at 10:00AM Sep 25, 2021Observed: 7.71 ft at 10:15AM Sep 25, 2021Observed: 7.71 ft at 10:17AM Sep 25, 2021Observed: 7.75 ft at 10:30AM Sep 25, 2021Observed: 7.71 ft at 10:45AM Sep 25, 2021Observed: 7.71 ft at 11:00AM Sep 25, 2021Observed: 7.74 ft at 11:15AM Sep 25, 2021Observed: 7.72 ft at 11:30AM Sep 25, 2021Observed: 7.77 ft at 11:45AM Sep 25, 2021Observed: 7.74 ft at 12:00PM Sep 25, 2021Observed: 7.72 ft at 12:15PM Sep 25, 2021Observed: 7.73 ft at 12:30PM Sep 25, 2021Observed: 7.79 ft at 12:45PM Sep 25, 2021Observed: 7.79 ft at 1:00PM Sep 25, 2021Observed: 7.76 ft at 1:15PM Sep 25, 2021Observed: 7.75 ft at 1:30PM Sep 25, 2021Observed: 7.76 ft at 1:45PM Sep 25, 2021Observed: 7.76 ft at 2:00PM Sep 25, 2021Observed: 7.73 ft at 2:15PM Sep 25, 2021Observed: 7.74 ft at 2:30PM Sep 25, 2021Observed: 7.8 ft at 2:45PM Sep 25, 2021Observed: 7.78 ft at 3:00PM Sep 25, 2021Observed: 7.79 ft at 3:15PM Sep 25, 2021Observed: 7.8 ft at 3:30PM Sep 25, 2021Observed: 7.75 ft at 3:45PM Sep 25, 2021Observed: 7.78 ft at 4:00PM Sep 25, 2021Observed: 7.78 ft at 4:15PM Sep 25, 2021Observed: 7.78 ft at 4:16PM Sep 25, 2021Observed: 7.78 ft at 4:30PM Sep 25, 2021Observed: 7.79 ft at 4:45PM Sep 25, 2021Observed: 7.76 ft at 5:00PM Sep 25, 2021Observed: 7.8 ft at 5:15PM Sep 25, 2021Observed: 7.75 ft at 5:30PM Sep 25, 2021Observed: 7.78 ft at 5:45PM Sep 25, 2021Observed: 7.75 ft at 6:00PM Sep 25, 2021Observed: 7.79 ft at 6:15PM Sep 25, 2021Observed: 7.77 ft at 6:30PM Sep 25, 2021Observed: 7.78 ft at 6:45PM Sep 25, 2021Observed: 7.76 ft at 7:00PM Sep 25, 2021Observed: 7.77 ft at 7:15PM Sep 25, 2021Observed: 7.78 ft at 7:30PM Sep 25, 2021Observed: 7.78 ft at 7:45PM Sep 25, 2021Observed: 7.79 ft at 8:00PM Sep 25, 2021Observed: 7.8 ft at 8:15PM Sep 25, 2021Observed: 7.77 ft at 8:30PM Sep 25, 2021Observed: 7.72 ft at 8:45PM Sep 25, 2021Observed: 7.78 ft at 9:00PM Sep 25, 2021Observed: 7.78 ft at 9:15PM Sep 25, 2021Observed: 7.75 ft at 9:30PM Sep 25, 2021Observed: 7.72 ft at 9:45PM Sep 25, 2021Observed: 7.77 ft at 10:00PM Sep 25, 2021Observed: 7.76 ft at 10:15PM Sep 25, 2021Observed: 7.76 ft at 10:16PM Sep 25, 2021Observed: 7.74 ft at 10:30PM Sep 25, 2021Observed: 7.75 ft at 10:45PM Sep 25, 2021Observed: 7.76 ft at 11:00PM Sep 25, 2021Observed: 7.76 ft at 11:15PM Sep 25, 2021Observed: 7.73 ft at 11:30PM Sep 25, 2021Observed: 7.71 ft at 11:45PM Sep 25, 2021Observed: 7.71 ft at 12:00AM Sep 26, 2021Observed: 7.72 ft at 12:15AM Sep 26, 2021Observed: 7.75 ft at 12:30AM Sep 26, 2021Observed: 7.75 ft at 12:45AM Sep 26, 2021Observed: 7.7 ft at 1:00AM Sep 26, 2021Observed: 7.71 ft at 1:15AM Sep 26, 2021Observed: 7.67 ft at 1:30AM Sep 26, 2021Observed: 7.7 ft at 1:45AM Sep 26, 2021Observed: 7.71 ft at 2:00AM Sep 26, 2021Observed: 7.72 ft at 2:15AM Sep 26, 2021Observed: 7.68 ft at 2:30AM Sep 26, 2021Observed: 7.68 ft at 2:45AM Sep 26, 2021Observed: 7.67 ft at 3:00AM Sep 26, 2021Observed: 7.65 ft at 3:15AM Sep 26, 2021Observed: 7.65 ft at 3:30AM Sep 26, 2021Observed: 7.66 ft at 3:45AM Sep 26, 2021Observed: 7.65 ft at 4:00AM Sep 26, 2021Observed: 7.68 ft at 4:15AM Sep 26, 2021Observed: 7.68 ft at 4:16AM Sep 26, 2021Observed: 7.63 ft at 4:30AM Sep 26, 2021Observed: 7.64 ft at 4:45AM Sep 26, 2021Observed: 7.66 ft at 5:00AM Sep 26, 2021Observed: 7.64 ft at 5:15AM Sep 26, 2021Observed: 7.62 ft at 5:30AM Sep 26, 2021Observed: 7.63 ft at 5:45AM Sep 26, 2021Observed: 7.61 ft at 6:00AM Sep 26, 2021Observed: 7.59 ft at 6:15AM Sep 26, 2021Observed: 7.56 ft at 6:30AM Sep 26, 2021Observed: 7.58 ft at 6:45AM Sep 26, 2021Observed: 7.59 ft at 7:00AM Sep 26, 2021Observed: 7.54 ft at 7:15AM Sep 26, 2021Observed: 7.55 ft at 7:30AM Sep 26, 2021Observed: 7.54 ft at 7:45AM Sep 26, 2021Observed: 7.53 ft at 8:00AM Sep 26, 2021Observed: 7.54 ft at 8:15AM Sep 26, 2021Observed: 7.53 ft at 8:30AM Sep 26, 2021Observed: 7.53 ft at 8:45AM Sep 26, 2021Observed: 7.52 ft at 9:00AM Sep 26, 2021Observed: 7.47 ft at 9:15AM Sep 26, 2021Observed: 7.54 ft at 9:30AM Sep 26, 2021Observed: 7.55 ft at 9:45AM Sep 26, 2021Observed: 7.53 ft at 10:00AM Sep 26, 2021Observed: 7.56 ft at 10:15AM Sep 26, 2021Observed: 7.56 ft at 10:17AM Sep 26, 2021Observed: 7.54 ft at 10:30AM Sep 26, 2021Observed: 7.54 ft at 10:45AM Sep 26, 2021Observed: 7.55 ft at 11:00AM Sep 26, 2021Observed: 7.55 ft at 11:15AM Sep 26, 2021Observed: 7.57 ft at 11:30AM Sep 26, 2021Observed: 7.54 ft at 11:45AM Sep 26, 2021Observed: 7.56 ft at 12:00PM Sep 26, 2021Observed: 7.5 ft at 12:15PM Sep 26, 2021Observed: 7.52 ft at 12:30PM Sep 26, 2021Observed: 7.51 ft at 12:45PM Sep 26, 2021Observed: 7.55 ft at 1:00PM Sep 26, 2021Observed: 7.53 ft at 1:15PM Sep 26, 2021Observed: 7.51 ft at 1:30PM Sep 26, 2021Observed: 7.5 ft at 1:45PM Sep 26, 2021Observed: 7.5 ft at 2:00PM Sep 26, 2021Observed: 7.53 ft at 2:15PM Sep 26, 2021Observed: 7.49 ft at 2:30PM Sep 26, 2021Observed: 7.53 ft at 2:45PM Sep 26, 2021Observed: 7.5 ft at 3:00PM Sep 26, 2021Observed: 7.51 ft at 3:15PM Sep 26, 2021Observed: 7.49 ft at 3:30PM Sep 26, 2021Observed: 7.49 ft at 3:45PM Sep 26, 2021Observed: 7.5 ft at 4:00PM Sep 26, 2021Observed: 7.5 ft at 4:15PM Sep 26, 2021Observed: 7.45 ft at 4:30PM Sep 26, 2021Observed: 7.45 ft at 4:31PM Sep 26, 2021Observed: 7.46 ft at 4:45PM Sep 26, 2021Observed: 7.47 ft at 5:00PM Sep 26, 2021Observed: 7.44 ft at 5:15PM Sep 26, 2021Observed: 7.43 ft at 5:30PM Sep 26, 2021Observed: 7.47 ft at 5:45PM Sep 26, 2021Observed: 7.46 ft at 6:00PM Sep 26, 2021Observed: 7.43 ft at 6:15PM Sep 26, 2021Observed: 7.42 ft at 6:30PM Sep 26, 2021Observed: 7.45 ft at 6:45PM Sep 26, 2021Observed: 7.45 ft at 7:00PM Sep 26, 2021Observed: 7.43 ft at 7:15PM Sep 26, 2021Observed: 7.44 ft at 7:30PM Sep 26, 2021Observed: 7.46 ft at 7:45PM Sep 26, 2021Observed: 7.43 ft at 8:00PM Sep 26, 2021Observed: 7.42 ft at 8:15PM Sep 26, 2021Observed: 7.42 ft at 8:30PM Sep 26, 2021Observed: 7.42 ft at 8:45PM Sep 26, 2021Observed: 7.4 ft at 9:00PM Sep 26, 2021Observed: 7.41 ft at 9:15PM Sep 26, 2021Observed: 7.4 ft at 9:30PM Sep 26, 2021Observed: 7.43 ft at 9:45PM Sep 26, 2021Observed: 7.41 ft at 10:00PM Sep 26, 2021Observed: 7.4 ft at 10:15PM Sep 26, 2021Observed: 7.43 ft at 10:30PM Sep 26, 2021Observed: 7.43 ft at 10:31PM Sep 26, 2021Observed: 7.4 ft at 10:45PM Sep 26, 2021Observed: 7.41 ft at 11:00PM Sep 26, 2021Observed: 7.39 ft at 11:15PM Sep 26, 2021Observed: 7.38 ft at 11:30PM Sep 26, 2021Observed: 7.41 ft at 11:45PM Sep 26, 2021Observed: 7.37 ft at 12:00AM Sep 27, 2021Observed: 7.39 ft at 12:15AM Sep 27, 2021Observed: 7.39 ft at 12:30AM Sep 27, 2021Observed: 7.36 ft at 12:45AM Sep 27, 2021Observed: 7.4 ft at 1:00AM Sep 27, 2021Observed: 7.38 ft at 1:15AM Sep 27, 2021Observed: 7.37 ft at 1:30AM Sep 27, 2021Observed: 7.4 ft at 1:45AM Sep 27, 2021Observed: 7.35 ft at 2:00AM Sep 27, 2021Observed: 7.39 ft at 2:15AM Sep 27, 2021Observed: 7.37 ft at 2:30AM Sep 27, 2021Observed: 7.36 ft at 2:45AM Sep 27, 2021Observed: 7.35 ft at 3:00AM Sep 27, 2021Observed: 7.36 ft at 3:15AM Sep 27, 2021Observed: 7.35 ft at 3:30AM Sep 27, 2021Observed: 7.36 ft at 3:45AM Sep 27, 2021Observed: 7.34 ft at 4:00AM Sep 27, 2021Observed: 7.31 ft at 4:15AM Sep 27, 2021Observed: 7.33 ft at 4:30AM Sep 27, 2021Observed: 7.33 ft at 4:31AM Sep 27, 2021Observed: 7.31 ft at 4:45AM Sep 27, 2021Observed: 7.3 ft at 5:00AM Sep 27, 2021Observed: 7.23 ft at 5:15AM Sep 27, 2021Observed: 7.26 ft at 5:30AM Sep 27, 2021Observed: 7.25 ft at 5:45AM Sep 27, 2021Observed: 7.25 ft at 6:00AM Sep 27, 2021Observed: 7.22 ft at 6:15AM Sep 27, 2021Observed: 7.21 ft at 6:30AM Sep 27, 2021Observed: 7.21 ft at 6:45AM Sep 27, 2021Observed: 7.2 ft at 7:00AM Sep 27, 2021Observed: 7.18 ft at 7:15AM Sep 27, 2021Observed: 7.17 ft at 7:30AM Sep 27, 2021Observed: 7.16 ft at 7:45AM Sep 27, 2021Observed: 7.16 ft at 8:00AM Sep 27, 2021Observed: 7.14 ft at 8:15AM Sep 27, 2021Observed: 7.13 ft at 8:30AM Sep 27, 2021Observed: 7.08 ft at 8:45AM Sep 27, 2021Observed: 7.13 ft at 9:00AM Sep 27, 2021Observed: 7.13 ft at 9:15AM Sep 27, 2021Observed: 7.16 ft at 9:30AM Sep 27, 2021Observed: 7.14 ft at 9:45AM Sep 27, 2021Observed: 7.14 ft at 10:00AM Sep 27, 2021Observed: 7.11 ft at 10:15AM Sep 27, 2021Observed: 7.11 ft at 10:30AM Sep 27, 2021Observed: 7.1 ft at 10:45AM Sep 27, 2021Observed: 7.11 ft at 11:00AM Sep 27, 2021Observed: 7.09 ft at 11:15AM Sep 27, 2021Observed: 7.08 ft at 11:30AM Sep 27, 2021Observed: 7.08 ft at 11:45AM Sep 27, 2021Observed: 7.09 ft at 12:00PM Sep 27, 2021Observed: 7.08 ft at 12:15PM Sep 27, 2021Observed: 7.07 ft at 12:30PM Sep 27, 2021Observed: 7.06 ft at 12:45PM Sep 27, 2021Observed: 7.05 ft at 1:00PM Sep 27, 2021Observed: 7.05 ft at 1:15PM Sep 27, 2021Observed: 7.04 ft at 1:30PM Sep 27, 2021Observed: 7.03 ft at 1:45PM Sep 27, 2021Observed: 7.03 ft at 2:00PM Sep 27, 2021Observed: 7.03 ft at 2:15PM Sep 27, 2021Observed: 7.03 ft at 2:30PM Sep 27, 2021Observed: 7.02 ft at 2:45PM Sep 27, 2021Observed: 7.03 ft at 3:00PM Sep 27, 2021Observed: 7.02 ft at 3:15PM Sep 27, 2021Observed: 7.01 ft at 3:30PM Sep 27, 2021Observed: 7.02 ft at 3:45PM Sep 27, 2021Observed: 7.02 ft at 4:00PM Sep 27, 2021Observed: 7.01 ft at 4:15PM Sep 27, 2021Observed: 6.99 ft at 4:30PM Sep 27, 2021Observed: 6.99 ft at 4:32PM Sep 27, 2021Highest Forecast: 7 ft 8:00PM Sep 27, 2021Highest Forecast: 7 ft 2:00AM Sep 28, 2021Forecast: 6.9 ft 8:00AM Sep 28, 2021Forecast: 6.9 ft 2:00PM Sep 28, 2021Forecast: 6.9 ft 8:00PM Sep 28, 2021Forecast: 6.8 ft 2:00AM Sep 29, 2021Forecast: 6.8 ft 8:00AM Sep 29, 2021Forecast: 6.8 ft 2:00PM Sep 29, 2021Forecast: 6.7 ft 8:00PM Sep 29, 2021Forecast: 6.7 ft 2:00AM Sep 30, 2021Forecast: 6.7 ft 8:00AM Sep 30, 2021USGS--Water Resources of the United StatesHENN3(plotting HGIRG) Graph Created (6:36PM Sep 27, 2021)ObservedForecast (issued 11:18AM Sep 27)Latest observed value: 6.99 ft at 4:32 PM EDT 27-Sep-2021. Flood Stage is 12 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts for the Contoocook River at Henniker are issued routinely year-round.
Return to Area Map
Upstream Gauge - at Peterborough Upstream Gauge
Flood Categories (in feet)
Major Flood Stage: 20
Moderate Flood Stage: 16
Flood Stage: 12
Action Stage: 10
Low Stage (in feet): -9999

Historic Crests
(1) 21.30 ft on 09/21/1938
(2) 14.54 ft on 04/17/2007
(3) 13.75 ft on 10/16/2005
(4) 13.48 ft on 05/15/2006
(5) 13.32 ft on 04/03/2004
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 13.25 ft on 03/16/2010
(2) 14.54 ft on 04/17/2007
(3) 13.48 ft on 05/15/2006
(4) 13.75 ft on 10/16/2005
(5) 12.36 ft on 04/04/2005
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
15 In Hillsborough, Henniker Street floods with 3 feet of water and Bear Hill road is impassible.
14 In Hillsborough, Henniker Street floods with 2 feet of water and the High Tide restaurant is inaccessible. In Henniker, Western Avenue floods.
13 In Hillsborough, Bear Hill road floods as well as Henniker Street from High Tide restaurant to Old Henniker Road.
12 In the town of Hillsborough, Hennicker street, Bear Hill Road, and the parking lot at High Tide restaurant flood. In Henniker, flood waters encroach on parts of Western Avenue.
10 Lowland flooding begins.
About This Location Collapse

Latitude: 43.152024° N, Longitude: 71.857800° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 12 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 29 475 ft 487 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
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 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.

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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: 2-Nov-2020 7:30 PM
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