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Hydrograph River at a Glance Download
Squannacook River at West Groton Stage (ft)Flow (kcfs)Observed: 1.96 ft at 3:30AM May 22, 2016Observed: 1.97 ft at 3:45AM May 22, 2016Observed: 1.96 ft at 4:00AM May 22, 2016Observed: 1.97 ft at 4:15AM May 22, 2016Observed: 1.96 ft at 4:30AM May 22, 2016Observed: 1.97 ft at 4:45AM May 22, 2016Observed: 1.96 ft at 5:00AM May 22, 2016Observed: 1.96 ft at 5:15AM May 22, 2016Observed: 1.95 ft at 5:30AM May 22, 2016Observed: 1.96 ft at 5:45AM May 22, 2016Observed: 1.95 ft at 6:00AM May 22, 2016Observed: 1.96 ft at 6:15AM May 22, 2016Observed: 1.95 ft at 6:30AM May 22, 2016Observed: 1.96 ft at 6:45AM May 22, 2016Observed: 1.95 ft at 7:00AM May 22, 2016Observed: 1.96 ft at 7:15AM May 22, 2016Observed: 1.95 ft at 7:30AM May 22, 2016Observed: 1.96 ft at 7:45AM May 22, 2016Observed: 1.95 ft at 8:00AM May 22, 2016Observed: 1.96 ft at 8:15AM May 22, 2016Observed: 1.95 ft at 8:30AM May 22, 2016Observed: 1.96 ft at 8:45AM May 22, 2016Observed: 1.95 ft at 9:00AM May 22, 2016Observed: 1.96 ft at 9:15AM May 22, 2016Observed: 1.94 ft at 9:30AM May 22, 2016Observed: 1.95 ft at 9:45AM May 22, 2016Observed: 1.94 ft at 10:00AM May 22, 2016Observed: 1.95 ft at 10:15AM May 22, 2016Observed: 1.94 ft at 10:30AM May 22, 2016Observed: 1.95 ft at 10:45AM May 22, 2016Observed: 1.94 ft at 11:00AM May 22, 2016Observed: 1.95 ft at 11:15AM May 22, 2016Observed: 1.94 ft at 11:30AM May 22, 2016Observed: 1.95 ft at 11:45AM May 22, 2016Observed: 1.94 ft at 12:00PM May 22, 2016Observed: 1.95 ft at 12:15PM May 22, 2016Observed: 1.94 ft at 12:30PM May 22, 2016Observed: 1.95 ft at 12:45PM May 22, 2016Observed: 1.94 ft at 1:00PM May 22, 2016Observed: 1.95 ft at 1:15PM May 22, 2016Observed: 1.94 ft at 1:30PM May 22, 2016Observed: 1.95 ft at 1:45PM May 22, 2016Observed: 1.94 ft at 2:00PM May 22, 2016Observed: 1.95 ft at 2:15PM May 22, 2016Observed: 1.94 ft at 2:30PM May 22, 2016Observed: 1.95 ft at 2:45PM May 22, 2016Observed: 1.94 ft at 3:00PM May 22, 2016Observed: 1.94 ft at 3:15PM May 22, 2016Observed: 1.93 ft at 3:30PM May 22, 2016Observed: 1.95 ft at 3:45PM May 22, 2016Observed: 1.93 ft at 4:00PM May 22, 2016Observed: 1.94 ft at 4:15PM May 22, 2016Observed: 1.93 ft at 4:30PM May 22, 2016Observed: 1.94 ft at 4:45PM May 22, 2016Observed: 1.93 ft at 5:00PM May 22, 2016Observed: 1.94 ft at 5:15PM May 22, 2016Observed: 1.93 ft at 5:30PM May 22, 2016Observed: 1.94 ft at 5:45PM May 22, 2016Observed: 1.93 ft at 6:00PM May 22, 2016Observed: 1.94 ft at 6:15PM May 22, 2016Observed: 1.93 ft at 6:30PM May 22, 2016Observed: 1.94 ft at 6:45PM May 22, 2016Observed: 1.93 ft at 7:00PM May 22, 2016Observed: 1.94 ft at 7:15PM May 22, 2016Observed: 1.93 ft at 7:30PM May 22, 2016Observed: 1.94 ft at 7:45PM May 22, 2016Observed: 1.93 ft at 8:00PM May 22, 2016Observed: 1.95 ft at 8:15PM May 22, 2016Observed: 1.94 ft at 8:30PM May 22, 2016Observed: 1.95 ft at 8:45PM May 22, 2016Observed: 1.94 ft at 9:00PM May 22, 2016Observed: 1.96 ft at 9:15PM May 22, 2016Observed: 1.95 ft at 9:30PM May 22, 2016Observed: 1.96 ft at 9:45PM May 22, 2016Observed: 1.95 ft at 10:00PM May 22, 2016Observed: 1.96 ft at 10:15PM May 22, 2016Observed: 1.95 ft at 10:30PM May 22, 2016Observed: 1.96 ft at 10:45PM May 22, 2016Observed: 1.95 ft at 11:00PM May 22, 2016Observed: 1.96 ft at 11:15PM May 22, 2016Observed: 1.95 ft at 11:30PM May 22, 2016Observed: 1.96 ft at 11:45PM May 22, 2016Observed: 1.95 ft at 12:00AM May 23, 2016Observed: 1.96 ft at 12:15AM May 23, 2016Observed: 1.95 ft at 12:30AM May 23, 2016Observed: 1.96 ft at 12:45AM May 23, 2016Observed: 1.95 ft at 1:00AM May 23, 2016Observed: 1.96 ft at 1:15AM May 23, 2016Observed: 1.95 ft at 1:30AM May 23, 2016Observed: 1.96 ft at 1:45AM May 23, 2016Observed: 1.95 ft at 2:00AM May 23, 2016Observed: 1.95 ft at 2:15AM May 23, 2016Observed: 1.94 ft at 2:30AM May 23, 2016Observed: 1.95 ft at 2:45AM May 23, 2016Observed: 1.94 ft at 3:00AM May 23, 2016Observed: 1.95 ft at 3:15AM May 23, 2016Observed: 1.94 ft at 3:30AM May 23, 2016Observed: 1.95 ft at 3:45AM May 23, 2016Observed: 1.94 ft at 4:00AM May 23, 2016Observed: 1.94 ft at 4:15AM May 23, 2016Observed: 1.93 ft at 4:30AM May 23, 2016Observed: 1.94 ft at 4:45AM May 23, 2016Observed: 1.93 ft at 5:00AM May 23, 2016Observed: 1.94 ft at 5:15AM May 23, 2016Observed: 1.93 ft at 5:30AM May 23, 2016Observed: 1.94 ft at 5:45AM May 23, 2016Observed: 1.93 ft at 6:00AM May 23, 2016Observed: 1.94 ft at 6:15AM May 23, 2016Observed: 1.93 ft at 6:30AM May 23, 2016Observed: 1.94 ft at 6:45AM May 23, 2016Observed: 1.93 ft at 7:00AM May 23, 2016Observed: 1.93 ft at 7:15AM May 23, 2016Observed: 1.92 ft at 7:30AM May 23, 2016Observed: 1.93 ft at 7:45AM May 23, 2016Observed: 1.92 ft at 8:00AM May 23, 2016Observed: 1.93 ft at 8:15AM May 23, 2016Observed: 1.92 ft at 8:30AM May 23, 2016Observed: 1.93 ft at 8:45AM May 23, 2016Observed: 1.92 ft at 9:00AM May 23, 2016Observed: 1.93 ft at 9:15AM May 23, 2016Observed: 1.92 ft at 9:30AM May 23, 2016Observed: 1.93 ft at 9:45AM May 23, 2016Observed: 1.92 ft at 10:00AM May 23, 2016Observed: 1.92 ft at 10:15AM May 23, 2016Observed: 1.92 ft at 10:30AM May 23, 2016Observed: 1.92 ft at 10:45AM May 23, 2016Observed: 1.92 ft at 11:00AM May 23, 2016Observed: 1.92 ft at 11:15AM May 23, 2016Observed: 1.91 ft at 11:30AM May 23, 2016Observed: 1.92 ft at 11:45AM May 23, 2016Observed: 1.91 ft at 12:00PM May 23, 2016Observed: 1.92 ft at 12:15PM May 23, 2016Observed: 1.91 ft at 12:30PM May 23, 2016Observed: 1.92 ft at 12:45PM May 23, 2016Observed: 1.91 ft at 1:00PM May 23, 2016Observed: 1.91 ft at 1:15PM May 23, 2016Observed: 1.9 ft at 1:30PM May 23, 2016Observed: 1.91 ft at 1:45PM May 23, 2016Observed: 1.9 ft at 2:00PM May 23, 2016Observed: 1.91 ft at 2:15PM May 23, 2016Observed: 1.9 ft at 2:30PM May 23, 2016Observed: 1.91 ft at 2:45PM May 23, 2016Observed: 1.9 ft at 3:00PM May 23, 2016Observed: 1.9 ft at 3:15PM May 23, 2016Observed: 1.89 ft at 3:30PM May 23, 2016Observed: 1.9 ft at 3:45PM May 23, 2016Observed: 1.89 ft at 4:00PM May 23, 2016Observed: 1.9 ft at 4:15PM May 23, 2016Observed: 1.89 ft at 4:30PM May 23, 2016Observed: 1.9 ft at 4:45PM May 23, 2016Observed: 1.89 ft at 5:00PM May 23, 2016Observed: 1.9 ft at 5:15PM May 23, 2016Observed: 1.89 ft at 5:30PM May 23, 2016Observed: 1.9 ft at 5:45PM May 23, 2016Observed: 1.89 ft at 6:00PM May 23, 2016Observed: 1.9 ft at 6:15PM May 23, 2016Observed: 1.89 ft at 6:30PM May 23, 2016Observed: 1.9 ft at 6:45PM May 23, 2016Observed: 1.89 ft at 7:00PM May 23, 2016Observed: 1.9 ft at 7:15PM May 23, 2016Observed: 1.89 ft at 7:30PM May 23, 2016Observed: 1.89 ft at 7:45PM May 23, 2016Observed: 1.89 ft at 8:00PM May 23, 2016Observed: 1.89 ft at 8:15PM May 23, 2016Observed: 1.89 ft at 8:30PM May 23, 2016Observed: 1.9 ft at 8:45PM May 23, 2016Observed: 1.89 ft at 9:00PM May 23, 2016Observed: 1.9 ft at 9:15PM May 23, 2016Observed: 1.89 ft at 9:30PM May 23, 2016Observed: 1.9 ft at 9:45PM May 23, 2016Observed: 1.89 ft at 10:00PM May 23, 2016Observed: 1.9 ft at 10:15PM May 23, 2016Observed: 1.89 ft at 10:30PM May 23, 2016Observed: 1.9 ft at 10:45PM May 23, 2016Observed: 1.89 ft at 11:00PM May 23, 2016Observed: 1.9 ft at 11:15PM May 23, 2016Observed: 1.89 ft at 11:30PM May 23, 2016Observed: 1.9 ft at 11:45PM May 23, 2016Observed: 1.89 ft at 12:00AM May 24, 2016Observed: 1.9 ft at 12:15AM May 24, 2016Observed: 1.89 ft at 12:30AM May 24, 2016Observed: 1.9 ft at 12:45AM May 24, 2016Observed: 1.89 ft at 1:00AM May 24, 2016Observed: 1.9 ft at 1:15AM May 24, 2016Observed: 1.89 ft at 1:30AM May 24, 2016Observed: 1.9 ft at 1:45AM May 24, 2016Observed: 1.89 ft at 2:00AM May 24, 2016Observed: 1.9 ft at 2:15AM May 24, 2016Observed: 1.89 ft at 2:30AM May 24, 2016Observed: 1.9 ft at 2:45AM May 24, 2016Observed: 1.89 ft at 3:00AM May 24, 2016Observed: 1.89 ft at 3:15AM May 24, 2016Observed: 1.88 ft at 3:30AM May 24, 2016Observed: 1.89 ft at 3:45AM May 24, 2016Observed: 1.88 ft at 4:00AM May 24, 2016Observed: 1.89 ft at 4:15AM May 24, 2016Observed: 1.88 ft at 4:30AM May 24, 2016Observed: 1.89 ft at 4:45AM May 24, 2016Observed: 1.88 ft at 5:00AM May 24, 2016Observed: 1.9 ft at 5:15AM May 24, 2016Observed: 1.89 ft at 5:30AM May 24, 2016Observed: 1.91 ft at 5:45AM May 24, 2016Observed: 1.9 ft at 6:00AM May 24, 2016Observed: 1.91 ft at 6:15AM May 24, 2016Observed: 1.9 ft at 6:30AM May 24, 2016Observed: 1.91 ft at 6:45AM May 24, 2016Observed: 1.9 ft at 7:00AM May 24, 2016Observed: 1.93 ft at 7:15AM May 24, 2016Observed: 1.92 ft at 7:30AM May 24, 2016Observed: 1.94 ft at 7:45AM May 24, 2016Observed: 1.93 ft at 8:00AM May 24, 2016Observed: 1.96 ft at 8:15AM May 24, 2016Observed: 1.95 ft at 8:30AM May 24, 2016Observed: 1.97 ft at 8:45AM May 24, 2016Observed: 1.96 ft at 9:00AM May 24, 2016Observed: 1.98 ft at 9:15AM May 24, 2016Observed: 1.97 ft at 9:30AM May 24, 2016Observed: 1.98 ft at 9:45AM May 24, 2016Observed: 1.97 ft at 10:00AM May 24, 2016Observed: 1.98 ft at 10:15AM May 24, 2016Observed: 1.97 ft at 10:30AM May 24, 2016Observed: 1.98 ft at 10:45AM May 24, 2016Observed: 1.97 ft at 11:00AM May 24, 2016Observed: 1.98 ft at 11:15AM May 24, 2016Observed: 1.97 ft at 11:30AM May 24, 2016Observed: 1.98 ft at 11:45AM May 24, 2016Observed: 1.97 ft at 12:00PM May 24, 2016Observed: 1.98 ft at 12:15PM May 24, 2016Observed: 1.97 ft at 12:30PM May 24, 2016Observed: 1.99 ft at 12:45PM May 24, 2016Observed: 1.97 ft at 1:00PM May 24, 2016Observed: 1.99 ft at 1:15PM May 24, 2016Observed: 1.97 ft at 1:30PM May 24, 2016Observed: 1.99 ft at 1:45PM May 24, 2016Observed: 1.97 ft at 2:00PM May 24, 2016Observed: 1.99 ft at 2:15PM May 24, 2016Observed: 1.98 ft at 2:30PM May 24, 2016Observed: 1.99 ft at 2:45PM May 24, 2016Observed: 1.98 ft at 3:00PM May 24, 2016Observed: 1.99 ft at 3:15PM May 24, 2016Observed: 1.98 ft at 3:30PM May 24, 2016Observed: 1.99 ft at 3:45PM May 24, 2016Observed: 1.98 ft at 4:00PM May 24, 2016Observed: 1.99 ft at 4:15PM May 24, 2016Observed: 1.98 ft at 4:30PM May 24, 2016Observed: 2 ft at 4:45PM May 24, 2016Observed: 1.98 ft at 5:00PM May 24, 2016Observed: 2 ft at 5:15PM May 24, 2016Observed: 1.99 ft at 5:30PM May 24, 2016Observed: 2 ft at 5:45PM May 24, 2016Observed: 1.99 ft at 6:00PM May 24, 2016Observed: 2 ft at 6:15PM May 24, 2016Observed: 1.99 ft at 6:30PM May 24, 2016Observed: 2.01 ft at 6:45PM May 24, 2016Observed: 1.99 ft at 7:00PM May 24, 2016Observed: 2.01 ft at 7:15PM May 24, 2016Observed: 2 ft at 7:30PM May 24, 2016Observed: 2.01 ft at 7:45PM May 24, 2016Observed: 2 ft at 8:00PM May 24, 2016Observed: 2.02 ft at 8:15PM May 24, 2016Observed: 2.01 ft at 8:30PM May 24, 2016Observed: 2.02 ft at 8:45PM May 24, 2016Observed: 2.01 ft at 9:00PM May 24, 2016Observed: 2.03 ft at 9:15PM May 24, 2016Observed: 2.01 ft at 9:30PM May 24, 2016Observed: 2.03 ft at 9:45PM May 24, 2016Observed: 2.02 ft at 10:00PM May 24, 2016Observed: 2.04 ft at 10:15PM May 24, 2016Observed: 2.03 ft at 10:30PM May 24, 2016Observed: 2.04 ft at 10:45PM May 24, 2016Observed: 2.03 ft at 11:00PM May 24, 2016Observed: 2.05 ft at 11:15PM May 24, 2016Observed: 2.04 ft at 11:30PM May 24, 2016Observed: 2.05 ft at 11:45PM May 24, 2016Observed: 2.04 ft at 12:00AM May 25, 2016Observed: 2.06 ft at 12:15AM May 25, 2016Observed: 2.05 ft at 12:30AM May 25, 2016Observed: 2.07 ft at 12:45AM May 25, 2016Observed: 2.05 ft at 1:00AM May 25, 2016Observed: 2.07 ft at 1:15AM May 25, 2016Observed: 2.06 ft at 1:30AM May 25, 2016Highest Observation: 2.08 ft at 1:45AM May 25, 2016Observed: 2.07 ft at 2:00AM May 25, 2016Highest Forecast: 2 ft 8:00AM May 25, 2016Highest Forecast: 2 ft 2:00PM May 25, 2016Highest Forecast: 2 ft 8:00PM May 25, 2016Highest Forecast: 2 ft 2:00AM May 26, 2016Highest Forecast: 2 ft 8:00AM May 26, 2016Forecast: 1.9 ft 2:00PM May 26, 2016Forecast: 1.9 ft 8:00PM May 26, 2016Forecast: 1.9 ft 2:00AM May 27, 2016Forecast: 1.8 ft 8:00AM May 27, 2016USGS--Water Resources of the United StatesWGTM3(plotting HGIRG) Graph Created (3:16AM May 25, 2016)ObservedForecast (issued 11:00AM May 24)Latest observed value: 2.07 ft at 2:00 AM EDT 25-May-2016. Flood Stage is 7 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: NGVD29
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: 42.634256° N, Longitude: 71.657848° W, Horizontal Datum: NAD27

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 29 244.279 251.279 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: 13-Aug-2015 1:57 AM
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