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Hydrograph River at a Glance Download
Squannacook River at West Groton Stage (ft)Flow (kcfs)Highest Observation: 2.41 ft at 10:15PM Oct 17, 2014Observed: 2.4 ft at 10:30PM Oct 17, 2014Observed: 2.4 ft at 10:45PM Oct 17, 2014Observed: 2.39 ft at 11:00PM Oct 17, 2014Observed: 2.38 ft at 11:15PM Oct 17, 2014Observed: 2.38 ft at 11:30PM Oct 17, 2014Observed: 2.37 ft at 11:45PM Oct 17, 2014Observed: 2.37 ft at 12:00AM Oct 18, 2014Observed: 2.36 ft at 12:15AM Oct 18, 2014Observed: 2.35 ft at 12:30AM Oct 18, 2014Observed: 2.35 ft at 12:45AM Oct 18, 2014Observed: 2.34 ft at 1:00AM Oct 18, 2014Observed: 2.34 ft at 1:15AM Oct 18, 2014Observed: 2.33 ft at 1:30AM Oct 18, 2014Observed: 2.33 ft at 1:45AM Oct 18, 2014Observed: 2.32 ft at 2:00AM Oct 18, 2014Observed: 2.32 ft at 2:15AM Oct 18, 2014Observed: 2.32 ft at 2:30AM Oct 18, 2014Observed: 2.31 ft at 2:45AM Oct 18, 2014Observed: 2.31 ft at 3:00AM Oct 18, 2014Observed: 2.3 ft at 3:15AM Oct 18, 2014Observed: 2.3 ft at 3:30AM Oct 18, 2014Observed: 2.3 ft at 3:45AM Oct 18, 2014Observed: 2.29 ft at 4:00AM Oct 18, 2014Observed: 2.29 ft at 4:15AM Oct 18, 2014Observed: 2.28 ft at 4:30AM Oct 18, 2014Observed: 2.28 ft at 4:45AM Oct 18, 2014Observed: 2.28 ft at 5:00AM Oct 18, 2014Observed: 2.27 ft at 5:15AM Oct 18, 2014Observed: 2.27 ft at 5:30AM Oct 18, 2014Observed: 2.26 ft at 5:45AM Oct 18, 2014Observed: 2.26 ft at 6:00AM Oct 18, 2014Observed: 2.26 ft at 6:15AM Oct 18, 2014Observed: 2.25 ft at 6:30AM Oct 18, 2014Observed: 2.25 ft at 6:45AM Oct 18, 2014Observed: 2.24 ft at 7:00AM Oct 18, 2014Observed: 2.24 ft at 7:15AM Oct 18, 2014Observed: 2.24 ft at 7:30AM Oct 18, 2014Observed: 2.23 ft at 7:45AM Oct 18, 2014Observed: 2.23 ft at 8:00AM Oct 18, 2014Observed: 2.22 ft at 8:15AM Oct 18, 2014Observed: 2.22 ft at 8:30AM Oct 18, 2014Observed: 2.22 ft at 8:45AM Oct 18, 2014Observed: 2.21 ft at 9:00AM Oct 18, 2014Observed: 2.21 ft at 9:15AM Oct 18, 2014Observed: 2.2 ft at 9:30AM Oct 18, 2014Observed: 2.2 ft at 9:45AM Oct 18, 2014Observed: 2.19 ft at 10:00AM Oct 18, 2014Observed: 2.17 ft at 10:15AM Oct 18, 2014Observed: 2.14 ft at 10:30AM Oct 18, 2014Observed: 2.11 ft at 10:45AM Oct 18, 2014Observed: 2.09 ft at 11:00AM Oct 18, 2014Observed: 2.06 ft at 11:15AM Oct 18, 2014Observed: 2.04 ft at 11:30AM Oct 18, 2014Observed: 2.02 ft at 11:45AM Oct 18, 2014Observed: 2.01 ft at 12:00PM Oct 18, 2014Observed: 2 ft at 12:15PM Oct 18, 2014Observed: 2 ft at 12:30PM Oct 18, 2014Observed: 2 ft at 12:45PM Oct 18, 2014Observed: 2 ft at 1:00PM Oct 18, 2014Observed: 2 ft at 1:15PM Oct 18, 2014Observed: 2.01 ft at 1:30PM Oct 18, 2014Observed: 2.01 ft at 1:45PM Oct 18, 2014Observed: 2.02 ft at 2:00PM Oct 18, 2014Observed: 2.02 ft at 2:15PM Oct 18, 2014Observed: 2.02 ft at 2:30PM Oct 18, 2014Observed: 2.03 ft at 2:45PM Oct 18, 2014Observed: 2.03 ft at 3:00PM Oct 18, 2014Observed: 2.03 ft at 3:15PM Oct 18, 2014Observed: 2.04 ft at 3:30PM Oct 18, 2014Observed: 2.04 ft at 3:45PM Oct 18, 2014Observed: 2.05 ft at 4:00PM Oct 18, 2014Observed: 2.06 ft at 4:15PM Oct 18, 2014Observed: 2.06 ft at 4:30PM Oct 18, 2014Observed: 2.06 ft at 4:45PM Oct 18, 2014Observed: 2.07 ft at 5:00PM Oct 18, 2014Observed: 2.07 ft at 5:15PM Oct 18, 2014Observed: 2.07 ft at 5:30PM Oct 18, 2014Observed: 2.07 ft at 5:45PM Oct 18, 2014Observed: 2.07 ft at 6:00PM Oct 18, 2014Observed: 2.07 ft at 6:15PM Oct 18, 2014Observed: 2.07 ft at 6:30PM Oct 18, 2014Observed: 2.07 ft at 6:45PM Oct 18, 2014Observed: 2.07 ft at 7:00PM Oct 18, 2014Observed: 2.07 ft at 7:15PM Oct 18, 2014Observed: 2.06 ft at 7:30PM Oct 18, 2014Observed: 2.06 ft at 7:45PM Oct 18, 2014Observed: 2.06 ft at 8:00PM Oct 18, 2014Observed: 2.06 ft at 8:15PM Oct 18, 2014Observed: 2.06 ft at 8:30PM Oct 18, 2014Observed: 2.05 ft at 8:45PM Oct 18, 2014Observed: 2.05 ft at 9:00PM Oct 18, 2014Observed: 2.05 ft at 9:15PM Oct 18, 2014Observed: 2.05 ft at 9:30PM Oct 18, 2014Observed: 2.05 ft at 9:45PM Oct 18, 2014Observed: 2.04 ft at 10:00PM Oct 18, 2014Observed: 2.04 ft at 10:15PM Oct 18, 2014Observed: 2.04 ft at 10:30PM Oct 18, 2014Observed: 2.03 ft at 10:45PM Oct 18, 2014Observed: 2.03 ft at 11:00PM Oct 18, 2014Observed: 2.03 ft at 11:15PM Oct 18, 2014Observed: 2.03 ft at 11:30PM Oct 18, 2014Observed: 2.02 ft at 11:45PM Oct 18, 2014Observed: 2.02 ft at 12:00AM Oct 19, 2014Observed: 2.02 ft at 12:15AM Oct 19, 2014Observed: 2.02 ft at 12:30AM Oct 19, 2014Observed: 2.01 ft at 12:45AM Oct 19, 2014Observed: 2.01 ft at 1:00AM Oct 19, 2014Observed: 2.01 ft at 1:15AM Oct 19, 2014Observed: 2 ft at 1:30AM Oct 19, 2014Observed: 2 ft at 1:45AM Oct 19, 2014Observed: 2 ft at 2:00AM Oct 19, 2014Observed: 1.99 ft at 2:15AM Oct 19, 2014Observed: 1.99 ft at 2:30AM Oct 19, 2014Observed: 1.99 ft at 2:45AM Oct 19, 2014Observed: 1.99 ft at 3:00AM Oct 19, 2014Observed: 1.99 ft at 3:15AM Oct 19, 2014Observed: 1.98 ft at 3:30AM Oct 19, 2014Observed: 1.98 ft at 3:45AM Oct 19, 2014Observed: 1.98 ft at 4:00AM Oct 19, 2014Observed: 1.98 ft at 4:15AM Oct 19, 2014Observed: 1.97 ft at 4:30AM Oct 19, 2014Observed: 1.97 ft at 4:45AM Oct 19, 2014Observed: 1.97 ft at 5:00AM Oct 19, 2014Observed: 1.97 ft at 5:15AM Oct 19, 2014Observed: 1.96 ft at 5:30AM Oct 19, 2014Observed: 1.96 ft at 5:45AM Oct 19, 2014Observed: 1.96 ft at 6:00AM Oct 19, 2014Observed: 1.96 ft at 6:15AM Oct 19, 2014Observed: 1.95 ft at 6:30AM Oct 19, 2014Observed: 1.95 ft at 6:45AM Oct 19, 2014Observed: 1.95 ft at 7:00AM Oct 19, 2014Observed: 1.94 ft at 7:15AM Oct 19, 2014Observed: 1.94 ft at 7:30AM Oct 19, 2014Observed: 1.94 ft at 7:45AM Oct 19, 2014Observed: 1.94 ft at 8:00AM Oct 19, 2014Observed: 1.94 ft at 8:15AM Oct 19, 2014Observed: 1.94 ft at 8:30AM Oct 19, 2014Observed: 1.93 ft at 8:45AM Oct 19, 2014Observed: 1.93 ft at 9:00AM Oct 19, 2014Observed: 1.93 ft at 9:15AM Oct 19, 2014Observed: 1.93 ft at 9:30AM Oct 19, 2014Observed: 1.93 ft at 9:45AM Oct 19, 2014Observed: 1.92 ft at 10:00AM Oct 19, 2014Observed: 1.92 ft at 10:15AM Oct 19, 2014Observed: 1.92 ft at 10:30AM Oct 19, 2014Observed: 1.92 ft at 10:45AM Oct 19, 2014Observed: 1.92 ft at 11:00AM Oct 19, 2014Observed: 1.92 ft at 11:15AM Oct 19, 2014Observed: 1.91 ft at 11:30AM Oct 19, 2014Observed: 1.91 ft at 11:45AM Oct 19, 2014Observed: 1.91 ft at 12:00PM Oct 19, 2014Observed: 1.91 ft at 12:15PM Oct 19, 2014Observed: 1.91 ft at 12:30PM Oct 19, 2014Observed: 1.9 ft at 12:45PM Oct 19, 2014Observed: 1.9 ft at 1:00PM Oct 19, 2014Observed: 1.9 ft at 1:15PM Oct 19, 2014Observed: 1.9 ft at 1:30PM Oct 19, 2014Observed: 1.89 ft at 1:45PM Oct 19, 2014Observed: 1.89 ft at 2:00PM Oct 19, 2014Observed: 1.89 ft at 2:15PM Oct 19, 2014Observed: 1.88 ft at 2:30PM Oct 19, 2014Observed: 1.88 ft at 2:45PM Oct 19, 2014Observed: 1.88 ft at 3:00PM Oct 19, 2014Observed: 1.88 ft at 3:15PM Oct 19, 2014Observed: 1.88 ft at 3:30PM Oct 19, 2014Observed: 1.87 ft at 3:45PM Oct 19, 2014Observed: 1.87 ft at 4:00PM Oct 19, 2014Observed: 1.87 ft at 4:15PM Oct 19, 2014Observed: 1.86 ft at 4:30PM Oct 19, 2014Observed: 1.86 ft at 4:45PM Oct 19, 2014Observed: 1.86 ft at 5:00PM Oct 19, 2014Observed: 1.86 ft at 5:15PM Oct 19, 2014Observed: 1.86 ft at 5:30PM Oct 19, 2014Observed: 1.86 ft at 5:45PM Oct 19, 2014Observed: 1.85 ft at 6:00PM Oct 19, 2014Observed: 1.85 ft at 6:15PM Oct 19, 2014Observed: 1.85 ft at 6:30PM Oct 19, 2014Observed: 1.85 ft at 6:45PM Oct 19, 2014Observed: 1.84 ft at 7:00PM Oct 19, 2014Observed: 1.84 ft at 7:15PM Oct 19, 2014Observed: 1.84 ft at 7:30PM Oct 19, 2014Observed: 1.84 ft at 7:45PM Oct 19, 2014Observed: 1.84 ft at 8:00PM Oct 19, 2014Observed: 1.84 ft at 8:15PM Oct 19, 2014Observed: 1.83 ft at 8:30PM Oct 19, 2014Observed: 1.83 ft at 8:45PM Oct 19, 2014Observed: 1.83 ft at 9:00PM Oct 19, 2014Observed: 1.83 ft at 9:15PM Oct 19, 2014Observed: 1.83 ft at 9:30PM Oct 19, 2014Observed: 1.82 ft at 9:45PM Oct 19, 2014Observed: 1.82 ft at 10:00PM Oct 19, 2014Observed: 1.82 ft at 10:15PM Oct 19, 2014Observed: 1.82 ft at 10:30PM Oct 19, 2014Observed: 1.82 ft at 10:45PM Oct 19, 2014Observed: 1.82 ft at 11:00PM Oct 19, 2014Observed: 1.81 ft at 11:15PM Oct 19, 2014Observed: 1.81 ft at 11:30PM Oct 19, 2014Observed: 1.81 ft at 11:45PM Oct 19, 2014Observed: 1.81 ft at 12:00AM Oct 20, 2014Observed: 1.81 ft at 12:15AM Oct 20, 2014Observed: 1.81 ft at 12:30AM Oct 20, 2014Observed: 1.81 ft at 12:45AM Oct 20, 2014Observed: 1.8 ft at 1:00AM Oct 20, 2014Observed: 1.8 ft at 1:15AM Oct 20, 2014Observed: 1.8 ft at 1:30AM Oct 20, 2014Observed: 1.8 ft at 1:45AM Oct 20, 2014Observed: 1.8 ft at 2:00AM Oct 20, 2014Observed: 1.79 ft at 2:15AM Oct 20, 2014Observed: 1.79 ft at 2:30AM Oct 20, 2014Observed: 1.79 ft at 2:45AM Oct 20, 2014Observed: 1.79 ft at 3:00AM Oct 20, 2014Observed: 1.79 ft at 3:15AM Oct 20, 2014Observed: 1.78 ft at 3:30AM Oct 20, 2014Observed: 1.78 ft at 3:45AM Oct 20, 2014Observed: 1.78 ft at 4:00AM Oct 20, 2014Observed: 1.78 ft at 4:15AM Oct 20, 2014Observed: 1.78 ft at 4:30AM Oct 20, 2014Observed: 1.78 ft at 4:45AM Oct 20, 2014Observed: 1.78 ft at 5:00AM Oct 20, 2014Observed: 1.78 ft at 5:15AM Oct 20, 2014Observed: 1.78 ft at 5:30AM Oct 20, 2014Observed: 1.77 ft at 5:45AM Oct 20, 2014Observed: 1.77 ft at 6:00AM Oct 20, 2014Observed: 1.77 ft at 6:15AM Oct 20, 2014Observed: 1.77 ft at 6:30AM Oct 20, 2014Observed: 1.77 ft at 6:45AM Oct 20, 2014Observed: 1.77 ft at 7:00AM Oct 20, 2014Observed: 1.77 ft at 7:15AM Oct 20, 2014Observed: 1.76 ft at 7:30AM Oct 20, 2014Observed: 1.76 ft at 7:45AM Oct 20, 2014Observed: 1.76 ft at 8:00AM Oct 20, 2014Observed: 1.76 ft at 8:15AM Oct 20, 2014Observed: 1.76 ft at 8:30AM Oct 20, 2014Observed: 1.76 ft at 8:45AM Oct 20, 2014Observed: 1.76 ft at 9:00AM Oct 20, 2014Observed: 1.75 ft at 9:15AM Oct 20, 2014Observed: 1.75 ft at 9:30AM Oct 20, 2014Observed: 1.75 ft at 9:45AM Oct 20, 2014Observed: 1.75 ft at 10:00AM Oct 20, 2014Observed: 1.76 ft at 10:15AM Oct 20, 2014Observed: 1.78 ft at 10:30AM Oct 20, 2014Observed: 1.81 ft at 10:45AM Oct 20, 2014Observed: 1.83 ft at 11:00AM Oct 20, 2014Observed: 1.85 ft at 11:15AM Oct 20, 2014Observed: 1.86 ft at 11:30AM Oct 20, 2014Observed: 1.87 ft at 11:45AM Oct 20, 2014Observed: 1.87 ft at 12:00PM Oct 20, 2014Observed: 1.87 ft at 12:15PM Oct 20, 2014Observed: 1.87 ft at 12:30PM Oct 20, 2014Observed: 1.87 ft at 12:45PM Oct 20, 2014Observed: 1.87 ft at 1:00PM Oct 20, 2014Observed: 1.86 ft at 1:15PM Oct 20, 2014Observed: 1.86 ft at 1:30PM Oct 20, 2014Observed: 1.85 ft at 1:45PM Oct 20, 2014Observed: 1.85 ft at 2:00PM Oct 20, 2014Observed: 1.84 ft at 2:15PM Oct 20, 2014Observed: 1.84 ft at 2:30PM Oct 20, 2014Observed: 1.83 ft at 2:45PM Oct 20, 2014Observed: 1.83 ft at 3:00PM Oct 20, 2014Observed: 1.82 ft at 3:15PM Oct 20, 2014Observed: 1.82 ft at 3:30PM Oct 20, 2014Observed: 1.81 ft at 3:45PM Oct 20, 2014Observed: 1.79 ft at 4:00PM Oct 20, 2014Observed: 1.78 ft at 4:15PM Oct 20, 2014Observed: 1.75 ft at 4:30PM Oct 20, 2014Observed: 1.73 ft at 4:45PM Oct 20, 2014Observed: 1.71 ft at 5:00PM Oct 20, 2014Observed: 1.69 ft at 5:15PM Oct 20, 2014Observed: 1.67 ft at 5:30PM Oct 20, 2014Observed: 1.65 ft at 5:45PM Oct 20, 2014Observed: 1.64 ft at 6:00PM Oct 20, 2014Observed: 1.63 ft at 6:15PM Oct 20, 2014Observed: 1.62 ft at 6:30PM Oct 20, 2014Observed: 1.62 ft at 6:45PM Oct 20, 2014Observed: 1.61 ft at 7:00PM Oct 20, 2014Observed: 1.61 ft at 7:15PM Oct 20, 2014Observed: 1.61 ft at 7:30PM Oct 20, 2014Observed: 1.61 ft at 7:45PM Oct 20, 2014Observed: 1.61 ft at 8:00PM Oct 20, 2014Observed: 1.61 ft at 8:15PM Oct 20, 2014Observed: 1.61 ft at 8:30PM Oct 20, 2014Observed: 1.62 ft at 8:45PM Oct 20, 2014Observed: 1.62 ft at 9:00PM Oct 20, 2014Forecast: 1.7 ft 2:00AM Oct 21, 2014Forecast: 1.7 ft 8:00AM Oct 21, 2014Forecast: 1.7 ft 2:00PM Oct 21, 2014Forecast: 1.7 ft 8:00PM Oct 21, 2014Forecast: 1.7 ft 2:00AM Oct 22, 2014Forecast: 1.7 ft 8:00AM Oct 22, 2014Forecast: 1.7 ft 2:00PM Oct 22, 2014Forecast: 1.8 ft 8:00PM Oct 22, 2014Forecast: 1.8 ft 2:00AM Oct 23, 2014Highest Forecast: 1.9 ft 8:00AM Oct 23, 2014USGS--Water Resources of the United StatesWGTM3(plotting HGIRG) Graph Created (10:01PM Oct 20, 2014)ObservedForecast (issued 11:14AM Oct 20)Latest observed value: 1.62 ft at 9:00 PM EDT 20-Oct-2014. Flood Stage is 7 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 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

Historical 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 Historical Crests

(P): Preliminary values subject to further review.

Low Water Records

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: 5-Aug-2014 6:39 PM
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