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Hydrograph River at a Glance Download
Squannacook River at West Groton Stage (ft)Flow (kcfs)Highest Observation: 3.47 ft at 11:30PM Dec 18, 2014Highest Observation: 3.47 ft at 11:45PM Dec 18, 2014Highest Observation: 3.47 ft at 12:00AM Dec 19, 2014Observed: 3.46 ft at 12:15AM Dec 19, 2014Observed: 3.46 ft at 12:30AM Dec 19, 2014Observed: 3.46 ft at 12:45AM Dec 19, 2014Observed: 3.46 ft at 1:00AM Dec 19, 2014Observed: 3.45 ft at 1:15AM Dec 19, 2014Observed: 3.45 ft at 1:30AM Dec 19, 2014Observed: 3.45 ft at 1:45AM Dec 19, 2014Observed: 3.45 ft at 2:00AM Dec 19, 2014Observed: 3.44 ft at 2:15AM Dec 19, 2014Observed: 3.44 ft at 2:30AM Dec 19, 2014Observed: 3.44 ft at 2:45AM Dec 19, 2014Observed: 3.43 ft at 3:00AM Dec 19, 2014Observed: 3.43 ft at 3:15AM Dec 19, 2014Observed: 3.43 ft at 3:30AM Dec 19, 2014Observed: 3.42 ft at 3:45AM Dec 19, 2014Observed: 3.42 ft at 4:00AM Dec 19, 2014Observed: 3.42 ft at 4:15AM Dec 19, 2014Observed: 3.41 ft at 4:30AM Dec 19, 2014Observed: 3.41 ft at 4:45AM Dec 19, 2014Observed: 3.41 ft at 5:00AM Dec 19, 2014Observed: 3.41 ft at 5:15AM Dec 19, 2014Observed: 3.4 ft at 5:30AM Dec 19, 2014Observed: 3.4 ft at 5:45AM Dec 19, 2014Observed: 3.4 ft at 6:00AM Dec 19, 2014Observed: 3.4 ft at 6:15AM Dec 19, 2014Observed: 3.39 ft at 6:30AM Dec 19, 2014Observed: 3.39 ft at 6:45AM Dec 19, 2014Observed: 3.39 ft at 7:00AM Dec 19, 2014Observed: 3.38 ft at 7:15AM Dec 19, 2014Observed: 3.38 ft at 7:30AM Dec 19, 2014Observed: 3.38 ft at 7:45AM Dec 19, 2014Observed: 3.38 ft at 8:00AM Dec 19, 2014Observed: 3.37 ft at 8:15AM Dec 19, 2014Observed: 3.37 ft at 8:30AM Dec 19, 2014Observed: 3.36 ft at 8:45AM Dec 19, 2014Observed: 3.36 ft at 9:00AM Dec 19, 2014Observed: 3.36 ft at 9:15AM Dec 19, 2014Observed: 3.36 ft at 9:30AM Dec 19, 2014Observed: 3.35 ft at 9:45AM Dec 19, 2014Observed: 3.35 ft at 10:00AM Dec 19, 2014Observed: 3.34 ft at 10:15AM Dec 19, 2014Observed: 3.34 ft at 10:30AM Dec 19, 2014Observed: 3.34 ft at 10:45AM Dec 19, 2014Observed: 3.34 ft at 11:00AM Dec 19, 2014Observed: 3.33 ft at 11:15AM Dec 19, 2014Observed: 3.33 ft at 11:30AM Dec 19, 2014Observed: 3.33 ft at 11:45AM Dec 19, 2014Observed: 3.32 ft at 12:00PM Dec 19, 2014Observed: 3.32 ft at 12:15PM Dec 19, 2014Observed: 3.32 ft at 12:30PM Dec 19, 2014Observed: 3.32 ft at 12:45PM Dec 19, 2014Observed: 3.31 ft at 1:00PM Dec 19, 2014Observed: 3.31 ft at 1:15PM Dec 19, 2014Observed: 3.31 ft at 1:30PM Dec 19, 2014Observed: 3.3 ft at 1:45PM Dec 19, 2014Observed: 3.3 ft at 2:00PM Dec 19, 2014Observed: 3.3 ft at 2:15PM Dec 19, 2014Observed: 3.3 ft at 2:30PM Dec 19, 2014Observed: 3.29 ft at 2:45PM Dec 19, 2014Observed: 3.29 ft at 3:00PM Dec 19, 2014Observed: 3.29 ft at 3:15PM Dec 19, 2014Observed: 3.28 ft at 3:30PM Dec 19, 2014Observed: 3.28 ft at 3:45PM Dec 19, 2014Observed: 3.28 ft at 4:00PM Dec 19, 2014Observed: 3.28 ft at 4:15PM Dec 19, 2014Observed: 3.27 ft at 4:30PM Dec 19, 2014Observed: 3.27 ft at 4:45PM Dec 19, 2014Observed: 3.27 ft at 5:00PM Dec 19, 2014Observed: 3.27 ft at 5:15PM Dec 19, 2014Observed: 3.26 ft at 5:30PM Dec 19, 2014Observed: 3.26 ft at 5:45PM Dec 19, 2014Observed: 3.26 ft at 6:00PM Dec 19, 2014Observed: 3.26 ft at 6:15PM Dec 19, 2014Observed: 3.25 ft at 6:30PM Dec 19, 2014Observed: 3.25 ft at 6:45PM Dec 19, 2014Observed: 3.25 ft at 7:00PM Dec 19, 2014Observed: 3.25 ft at 7:15PM Dec 19, 2014Observed: 3.24 ft at 7:30PM Dec 19, 2014Observed: 3.24 ft at 7:45PM Dec 19, 2014Observed: 3.24 ft at 8:00PM Dec 19, 2014Observed: 3.24 ft at 8:15PM Dec 19, 2014Observed: 3.23 ft at 8:30PM Dec 19, 2014Observed: 3.23 ft at 8:45PM Dec 19, 2014Observed: 3.23 ft at 9:00PM Dec 19, 2014Observed: 3.22 ft at 9:15PM Dec 19, 2014Observed: 3.22 ft at 9:30PM Dec 19, 2014Observed: 3.22 ft at 9:45PM Dec 19, 2014Observed: 3.22 ft at 10:00PM Dec 19, 2014Observed: 3.21 ft at 10:15PM Dec 19, 2014Observed: 3.21 ft at 10:30PM Dec 19, 2014Observed: 3.21 ft at 10:45PM Dec 19, 2014Observed: 3.21 ft at 11:00PM Dec 19, 2014Observed: 3.2 ft at 11:15PM Dec 19, 2014Observed: 3.2 ft at 11:30PM Dec 19, 2014Observed: 3.2 ft at 11:45PM Dec 19, 2014Observed: 3.2 ft at 12:00AM Dec 20, 2014Observed: 3.19 ft at 12:15AM Dec 20, 2014Observed: 3.19 ft at 12:30AM Dec 20, 2014Observed: 3.19 ft at 12:45AM Dec 20, 2014Observed: 3.19 ft at 1:00AM Dec 20, 2014Observed: 3.19 ft at 1:15AM Dec 20, 2014Observed: 3.18 ft at 1:30AM Dec 20, 2014Observed: 3.18 ft at 1:45AM Dec 20, 2014Observed: 3.18 ft at 2:00AM Dec 20, 2014Observed: 3.18 ft at 2:15AM Dec 20, 2014Observed: 3.17 ft at 2:30AM Dec 20, 2014Observed: 3.17 ft at 2:45AM Dec 20, 2014Observed: 3.17 ft at 3:00AM Dec 20, 2014Observed: 3.16 ft at 3:15AM Dec 20, 2014Observed: 3.16 ft at 3:30AM Dec 20, 2014Observed: 3.16 ft at 3:45AM Dec 20, 2014Observed: 3.16 ft at 4:00AM Dec 20, 2014Observed: 3.15 ft at 4:15AM Dec 20, 2014Observed: 3.15 ft at 4:30AM Dec 20, 2014Observed: 3.15 ft at 4:45AM Dec 20, 2014Observed: 3.14 ft at 5:00AM Dec 20, 2014Observed: 3.14 ft at 5:15AM Dec 20, 2014Observed: 3.14 ft at 5:30AM Dec 20, 2014Observed: 3.14 ft at 5:45AM Dec 20, 2014Observed: 3.14 ft at 6:00AM Dec 20, 2014Observed: 3.13 ft at 6:15AM Dec 20, 2014Observed: 3.13 ft at 6:30AM Dec 20, 2014Observed: 3.13 ft at 6:45AM Dec 20, 2014Observed: 3.13 ft at 7:00AM Dec 20, 2014Observed: 3.12 ft at 7:15AM Dec 20, 2014Observed: 3.12 ft at 7:30AM Dec 20, 2014Observed: 3.12 ft at 7:45AM Dec 20, 2014Observed: 3.12 ft at 8:00AM Dec 20, 2014Observed: 3.12 ft at 8:15AM Dec 20, 2014Observed: 3.11 ft at 8:30AM Dec 20, 2014Observed: 3.11 ft at 8:45AM Dec 20, 2014Observed: 3.11 ft at 9:00AM Dec 20, 2014Observed: 3.11 ft at 9:15AM Dec 20, 2014Observed: 3.1 ft at 9:30AM Dec 20, 2014Observed: 3.1 ft at 9:45AM Dec 20, 2014Observed: 3.1 ft at 10:00AM Dec 20, 2014Observed: 3.1 ft at 10:15AM Dec 20, 2014Observed: 3.1 ft at 10:30AM Dec 20, 2014Observed: 3.09 ft at 10:45AM Dec 20, 2014Observed: 3.09 ft at 11:00AM Dec 20, 2014Observed: 3.09 ft at 11:15AM Dec 20, 2014Observed: 3.09 ft at 11:30AM Dec 20, 2014Observed: 3.08 ft at 11:45AM Dec 20, 2014Observed: 3.08 ft at 12:00PM Dec 20, 2014Observed: 3.08 ft at 12:15PM Dec 20, 2014Observed: 3.08 ft at 12:30PM Dec 20, 2014Observed: 3.08 ft at 12:45PM Dec 20, 2014Observed: 3.07 ft at 1:00PM Dec 20, 2014Observed: 3.07 ft at 1:15PM Dec 20, 2014Observed: 3.07 ft at 1:30PM Dec 20, 2014Observed: 3.07 ft at 1:45PM Dec 20, 2014Observed: 3.07 ft at 2:00PM Dec 20, 2014Observed: 3.07 ft at 2:15PM Dec 20, 2014Observed: 3.06 ft at 2:30PM Dec 20, 2014Observed: 3.06 ft at 2:45PM Dec 20, 2014Observed: 3.06 ft at 3:00PM Dec 20, 2014Observed: 3.06 ft at 3:15PM Dec 20, 2014Observed: 3.06 ft at 3:30PM Dec 20, 2014Observed: 3.06 ft at 3:45PM Dec 20, 2014Observed: 3.05 ft at 4:00PM Dec 20, 2014Observed: 3.05 ft at 4:15PM Dec 20, 2014Observed: 3.05 ft at 4:30PM Dec 20, 2014Observed: 3.05 ft at 4:45PM Dec 20, 2014Observed: 3.04 ft at 5:00PM Dec 20, 2014Observed: 3.04 ft at 5:15PM Dec 20, 2014Observed: 3.04 ft at 5:30PM Dec 20, 2014Observed: 3.04 ft at 5:45PM Dec 20, 2014Observed: 3.04 ft at 6:00PM Dec 20, 2014Observed: 3.04 ft at 6:15PM Dec 20, 2014Observed: 3.04 ft at 6:30PM Dec 20, 2014Observed: 3.03 ft at 6:45PM Dec 20, 2014Observed: 3.03 ft at 7:00PM Dec 20, 2014Observed: 3.03 ft at 7:15PM Dec 20, 2014Observed: 3.03 ft at 7:30PM Dec 20, 2014Observed: 3.03 ft at 7:45PM Dec 20, 2014Observed: 3.03 ft at 8:00PM Dec 20, 2014Observed: 3.02 ft at 8:15PM Dec 20, 2014Observed: 3.02 ft at 8:30PM Dec 20, 2014Observed: 3.02 ft at 8:45PM Dec 20, 2014Observed: 3.02 ft at 9:00PM Dec 20, 2014Observed: 3.02 ft at 9:15PM Dec 20, 2014Observed: 3.02 ft at 9:30PM Dec 20, 2014Observed: 3.01 ft at 9:45PM Dec 20, 2014Observed: 3.01 ft at 10:00PM Dec 20, 2014Observed: 3.01 ft at 10:15PM Dec 20, 2014Observed: 3.01 ft at 10:30PM Dec 20, 2014Observed: 3.01 ft at 10:45PM Dec 20, 2014Observed: 3.01 ft at 11:00PM Dec 20, 2014Observed: 3 ft at 11:15PM Dec 20, 2014Observed: 3 ft at 11:30PM Dec 20, 2014Observed: 3 ft at 11:45PM Dec 20, 2014Observed: 3 ft at 12:00AM Dec 21, 2014Observed: 3 ft at 12:15AM Dec 21, 2014Observed: 3 ft at 12:30AM Dec 21, 2014Observed: 3 ft at 12:45AM Dec 21, 2014Observed: 2.99 ft at 1:00AM Dec 21, 2014Observed: 2.99 ft at 1:15AM Dec 21, 2014Observed: 2.99 ft at 1:30AM Dec 21, 2014Observed: 2.99 ft at 1:45AM Dec 21, 2014Observed: 2.99 ft at 2:00AM Dec 21, 2014Observed: 2.99 ft at 2:15AM Dec 21, 2014Observed: 2.98 ft at 2:30AM Dec 21, 2014Observed: 2.98 ft at 2:45AM Dec 21, 2014Observed: 2.98 ft at 3:00AM Dec 21, 2014Observed: 2.98 ft at 3:15AM Dec 21, 2014Observed: 2.98 ft at 3:30AM Dec 21, 2014Observed: 2.98 ft at 3:45AM Dec 21, 2014Observed: 2.98 ft at 4:00AM Dec 21, 2014Observed: 2.98 ft at 4:15AM Dec 21, 2014Observed: 2.97 ft at 4:30AM Dec 21, 2014Observed: 2.97 ft at 4:45AM Dec 21, 2014Observed: 2.97 ft at 5:00AM Dec 21, 2014Observed: 2.97 ft at 5:15AM Dec 21, 2014Observed: 2.97 ft at 5:30AM Dec 21, 2014Observed: 2.97 ft at 5:45AM Dec 21, 2014Observed: 2.97 ft at 6:00AM Dec 21, 2014Observed: 2.96 ft at 6:15AM Dec 21, 2014Observed: 2.96 ft at 6:30AM Dec 21, 2014Observed: 2.96 ft at 6:45AM Dec 21, 2014Observed: 2.96 ft at 7:00AM Dec 21, 2014Observed: 2.96 ft at 7:15AM Dec 21, 2014Observed: 2.96 ft at 7:30AM Dec 21, 2014Observed: 2.96 ft at 7:45AM Dec 21, 2014Observed: 2.96 ft at 8:00AM Dec 21, 2014Observed: 2.96 ft at 8:15AM Dec 21, 2014Observed: 2.95 ft at 8:30AM Dec 21, 2014Observed: 2.95 ft at 8:45AM Dec 21, 2014Observed: 2.95 ft at 9:00AM Dec 21, 2014Observed: 2.95 ft at 9:15AM Dec 21, 2014Observed: 2.95 ft at 9:30AM Dec 21, 2014Observed: 2.95 ft at 9:45AM Dec 21, 2014Observed: 2.94 ft at 10:00AM Dec 21, 2014Observed: 2.94 ft at 10:15AM Dec 21, 2014Observed: 2.94 ft at 10:30AM Dec 21, 2014Observed: 2.94 ft at 10:45AM Dec 21, 2014Observed: 2.94 ft at 11:00AM Dec 21, 2014Observed: 2.94 ft at 11:15AM Dec 21, 2014Observed: 2.94 ft at 11:30AM Dec 21, 2014Observed: 2.94 ft at 11:45AM Dec 21, 2014Observed: 2.94 ft at 12:00PM Dec 21, 2014Observed: 2.94 ft at 12:15PM Dec 21, 2014Observed: 2.94 ft at 12:30PM Dec 21, 2014Observed: 2.93 ft at 12:45PM Dec 21, 2014Observed: 2.93 ft at 1:00PM Dec 21, 2014Observed: 2.93 ft at 1:15PM Dec 21, 2014Observed: 2.93 ft at 1:30PM Dec 21, 2014Observed: 2.93 ft at 1:45PM Dec 21, 2014Observed: 2.93 ft at 2:00PM Dec 21, 2014Observed: 2.93 ft at 2:15PM Dec 21, 2014Observed: 2.93 ft at 2:30PM Dec 21, 2014Observed: 2.93 ft at 2:45PM Dec 21, 2014Observed: 2.93 ft at 3:00PM Dec 21, 2014Observed: 2.92 ft at 3:15PM Dec 21, 2014Observed: 2.92 ft at 3:30PM Dec 21, 2014Observed: 2.92 ft at 3:45PM Dec 21, 2014Observed: 2.92 ft at 4:00PM Dec 21, 2014Observed: 2.92 ft at 4:15PM Dec 21, 2014Observed: 2.92 ft at 4:30PM Dec 21, 2014Observed: 2.92 ft at 4:45PM Dec 21, 2014Observed: 2.92 ft at 5:00PM Dec 21, 2014Observed: 2.92 ft at 5:15PM Dec 21, 2014Observed: 2.92 ft at 5:30PM Dec 21, 2014Observed: 2.91 ft at 5:45PM Dec 21, 2014Observed: 2.91 ft at 6:00PM Dec 21, 2014Observed: 2.91 ft at 6:15PM Dec 21, 2014Observed: 2.91 ft at 6:30PM Dec 21, 2014Observed: 2.91 ft at 6:45PM Dec 21, 2014Observed: 2.91 ft at 7:00PM Dec 21, 2014Observed: 2.91 ft at 7:15PM Dec 21, 2014Observed: 2.91 ft at 7:30PM Dec 21, 2014Observed: 2.91 ft at 7:45PM Dec 21, 2014Observed: 2.91 ft at 8:00PM Dec 21, 2014Observed: 2.91 ft at 8:15PM Dec 21, 2014Observed: 2.91 ft at 8:30PM Dec 21, 2014Observed: 2.9 ft at 8:45PM Dec 21, 2014Observed: 2.9 ft at 9:00PM Dec 21, 2014Observed: 2.9 ft at 9:15PM Dec 21, 2014Observed: 2.9 ft at 9:30PM Dec 21, 2014Observed: 2.9 ft at 9:45PM Dec 21, 2014Observed: 2.9 ft at 10:00PM Dec 21, 2014Highest Forecast: 2.9 ft 1:00AM Dec 22, 2014Forecast: 2.8 ft 7:00AM Dec 22, 2014Forecast: 2.8 ft 1:00PM Dec 22, 2014Forecast: 2.8 ft 7:00PM Dec 22, 2014Forecast: 2.8 ft 1:00AM Dec 23, 2014Forecast: 2.8 ft 7:00AM Dec 23, 2014Forecast: 2.7 ft 1:00PM Dec 23, 2014Forecast: 2.7 ft 7:00PM Dec 23, 2014Forecast: 2.7 ft 1:00AM Dec 24, 2014Forecast: 2.7 ft 7:00AM Dec 24, 2014USGS--Water Resources of the United StatesWGTM3(plotting HGIRG) Graph Created (11:16PM Dec 21, 2014)ObservedForecast (issued 10:56AM Dec 21)Latest observed value: 2.9 ft at 10:00 PM EST 21-Dec-2014. Flood Stage is 7 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EST)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts for the Squannacook River at West Groton are issued routinely year-round.
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Flood Categories (in feet)
Major Flood Stage: 9.5
Moderate Flood Stage: 8.5
Flood Stage: 7
Action Stage: 6
Low Stage (in feet): 0

Historic Crests
(1) 8.50 ft on 04/17/2007
(2) 8.16 ft on 04/06/1987
(3) 8.07 ft on 04/02/2004
(4) 8.04 ft on 10/16/1955
(5) 8.03 ft on 03/15/2010
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 7.21 ft on 03/08/2011
(2) 7.56 ft on 03/31/2010
(3) 8.03 ft on 03/15/2010
(4) 7.31 ft on 02/26/2010
(5) 8.50 ft on 04/17/2007
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
9 This is a serious flood event. Widespread flooding is expected along the river through Townsend, Shirley and Groton. Small brooks and tributaries trying to flow into the Squannacook will experience flooding as well. Some road closures may be needed. If asked to evacuate, do so immediately. Follow the directions of emergency management officials.
8.5 Flooding will affect portions of Townsend and Groton. Areas along Turnpike and Barker Hill Roads and along Squannacook Terrace should expect flooding. In addition, flooding also occurs on several access roads to the Townsend State Forest.
8 Minor flooding is expected in lower lying sections of Townsend including the farming areas along Turnpike and Barker Hill roads. Flooding may also spread into low lying areas along Squannacook Terrace.
7.5 Minor flooding affects the lowest lying sections of Townsend, including the farmland along Turnpike and Barker Hill roads.
About This Location Collapse

Latitude: 42.634167° N, Longitude: 71.658333° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 7 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 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other NULL NULL  

Current/Historical Observations:

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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.
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Page last modified: 20-Nov-2014 2:55 AM
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