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Hydrograph River at a Glance Download
Willimantic River at Coventry Stage (ft)Flow (kcfs)Observed: 4.85 ft at 3:30PM Mar 17, 2023Highest Observation: 4.88 ft at 3:45PM Mar 17, 2023Observed: 4.86 ft at 4:00PM Mar 17, 2023Observed: 4.86 ft at 4:15PM Mar 17, 2023Observed: 4.84 ft at 4:30PM Mar 17, 2023Observed: 4.87 ft at 4:45PM Mar 17, 2023Observed: 4.84 ft at 5:00PM Mar 17, 2023Observed: 4.84 ft at 5:15PM Mar 17, 2023Observed: 4.85 ft at 5:30PM Mar 17, 2023Observed: 4.83 ft at 5:45PM Mar 17, 2023Observed: 4.84 ft at 6:00PM Mar 17, 2023Observed: 4.84 ft at 6:15PM Mar 17, 2023Observed: 4.85 ft at 6:30PM Mar 17, 2023Observed: 4.82 ft at 6:45PM Mar 17, 2023Observed: 4.83 ft at 7:00PM Mar 17, 2023Observed: 4.83 ft at 7:15PM Mar 17, 2023Observed: 4.83 ft at 7:30PM Mar 17, 2023Observed: 4.83 ft at 7:45PM Mar 17, 2023Observed: 4.83 ft at 8:00PM Mar 17, 2023Observed: 4.81 ft at 8:15PM Mar 17, 2023Observed: 4.82 ft at 8:30PM Mar 17, 2023Observed: 4.81 ft at 8:45PM Mar 17, 2023Observed: 4.82 ft at 9:00PM Mar 17, 2023Observed: 4.81 ft at 9:15PM Mar 17, 2023Observed: 4.8 ft at 9:30PM Mar 17, 2023Observed: 4.81 ft at 9:45PM Mar 17, 2023Observed: 4.8 ft at 10:00PM Mar 17, 2023Observed: 4.8 ft at 10:15PM Mar 17, 2023Observed: 4.8 ft at 10:30PM Mar 17, 2023Observed: 4.8 ft at 10:45PM Mar 17, 2023Observed: 4.79 ft at 11:00PM Mar 17, 2023Observed: 4.79 ft at 11:15PM Mar 17, 2023Observed: 4.78 ft at 11:30PM Mar 17, 2023Observed: 4.78 ft at 11:45PM Mar 17, 2023Observed: 4.77 ft at 12:00AM Mar 18, 2023Observed: 4.77 ft at 12:15AM Mar 18, 2023Observed: 4.78 ft at 12:30AM Mar 18, 2023Observed: 4.78 ft at 12:45AM Mar 18, 2023Observed: 4.77 ft at 1:00AM Mar 18, 2023Observed: 4.76 ft at 1:15AM Mar 18, 2023Observed: 4.77 ft at 1:30AM Mar 18, 2023Observed: 4.77 ft at 1:45AM Mar 18, 2023Observed: 4.77 ft at 2:00AM Mar 18, 2023Observed: 4.75 ft at 2:15AM Mar 18, 2023Observed: 4.77 ft at 2:30AM Mar 18, 2023Observed: 4.77 ft at 2:45AM Mar 18, 2023Observed: 4.74 ft at 3:00AM Mar 18, 2023Observed: 4.77 ft at 3:15AM Mar 18, 2023Observed: 4.76 ft at 3:30AM Mar 18, 2023Observed: 4.75 ft at 3:45AM Mar 18, 2023Observed: 4.77 ft at 4:00AM Mar 18, 2023Observed: 4.76 ft at 4:15AM Mar 18, 2023Observed: 4.76 ft at 4:30AM Mar 18, 2023Observed: 4.77 ft at 4:45AM Mar 18, 2023Observed: 4.77 ft at 5:00AM Mar 18, 2023Observed: 4.76 ft at 5:15AM Mar 18, 2023Observed: 4.77 ft at 5:30AM Mar 18, 2023Observed: 4.78 ft at 5:45AM Mar 18, 2023Observed: 4.76 ft at 6:00AM Mar 18, 2023Observed: 4.78 ft at 6:15AM Mar 18, 2023Observed: 4.76 ft at 6:30AM Mar 18, 2023Observed: 4.77 ft at 6:45AM Mar 18, 2023Observed: 4.77 ft at 7:00AM Mar 18, 2023Observed: 4.76 ft at 7:15AM Mar 18, 2023Observed: 4.76 ft at 7:30AM Mar 18, 2023Observed: 4.76 ft at 7:45AM Mar 18, 2023Observed: 4.75 ft at 8:00AM Mar 18, 2023Observed: 4.74 ft at 8:15AM Mar 18, 2023Observed: 4.76 ft at 8:30AM Mar 18, 2023Observed: 4.74 ft at 8:45AM Mar 18, 2023Observed: 4.75 ft at 9:00AM Mar 18, 2023Observed: 4.75 ft at 9:15AM Mar 18, 2023Observed: 4.76 ft at 9:30AM Mar 18, 2023Observed: 4.74 ft at 9:45AM Mar 18, 2023Observed: 4.74 ft at 10:00AM Mar 18, 2023Observed: 4.75 ft at 10:15AM Mar 18, 2023Observed: 4.74 ft at 10:30AM Mar 18, 2023Observed: 4.76 ft at 10:45AM Mar 18, 2023Observed: 4.75 ft at 11:00AM Mar 18, 2023Observed: 4.76 ft at 11:15AM Mar 18, 2023Observed: 4.76 ft at 11:30AM Mar 18, 2023Observed: 4.75 ft at 11:45AM Mar 18, 2023Observed: 4.75 ft at 12:00PM Mar 18, 2023Observed: 4.75 ft at 12:15PM Mar 18, 2023Observed: 4.76 ft at 12:30PM Mar 18, 2023Observed: 4.75 ft at 12:45PM Mar 18, 2023Observed: 4.76 ft at 1:00PM Mar 18, 2023Observed: 4.74 ft at 1:15PM Mar 18, 2023Observed: 4.74 ft at 1:30PM Mar 18, 2023Observed: 4.74 ft at 1:45PM Mar 18, 2023Observed: 4.75 ft at 2:00PM Mar 18, 2023Observed: 4.73 ft at 2:15PM Mar 18, 2023Observed: 4.75 ft at 2:30PM Mar 18, 2023Observed: 4.72 ft at 2:45PM Mar 18, 2023Observed: 4.72 ft at 3:00PM Mar 18, 2023Observed: 4.74 ft at 3:15PM Mar 18, 2023Observed: 4.73 ft at 3:30PM Mar 18, 2023Observed: 4.73 ft at 3:45PM Mar 18, 2023Observed: 4.73 ft at 4:00PM Mar 18, 2023Observed: 4.73 ft at 4:15PM Mar 18, 2023Observed: 4.74 ft at 4:30PM Mar 18, 2023Observed: 4.73 ft at 4:45PM Mar 18, 2023Observed: 4.72 ft at 5:00PM Mar 18, 2023Observed: 4.72 ft at 5:15PM Mar 18, 2023Observed: 4.71 ft at 5:30PM Mar 18, 2023Observed: 4.72 ft at 5:45PM Mar 18, 2023Observed: 4.71 ft at 6:00PM Mar 18, 2023Observed: 4.72 ft at 6:15PM Mar 18, 2023Observed: 4.72 ft at 6:30PM Mar 18, 2023Observed: 4.73 ft at 6:45PM Mar 18, 2023Observed: 4.71 ft at 7:00PM Mar 18, 2023Observed: 4.71 ft at 7:15PM Mar 18, 2023Observed: 4.72 ft at 7:30PM Mar 18, 2023Observed: 4.72 ft at 7:45PM Mar 18, 2023Observed: 4.71 ft at 8:00PM Mar 18, 2023Observed: 4.71 ft at 8:15PM Mar 18, 2023Observed: 4.7 ft at 8:30PM Mar 18, 2023Observed: 4.7 ft at 8:45PM Mar 18, 2023Observed: 4.7 ft at 9:00PM Mar 18, 2023Observed: 4.69 ft at 9:15PM Mar 18, 2023Observed: 4.69 ft at 9:30PM Mar 18, 2023Observed: 4.69 ft at 9:45PM Mar 18, 2023Observed: 4.71 ft at 10:00PM Mar 18, 2023Observed: 4.7 ft at 10:15PM Mar 18, 2023Observed: 4.72 ft at 10:30PM Mar 18, 2023Observed: 4.71 ft at 10:45PM Mar 18, 2023Observed: 4.71 ft at 11:00PM Mar 18, 2023Observed: 4.7 ft at 11:15PM Mar 18, 2023Observed: 4.71 ft at 11:30PM Mar 18, 2023Observed: 4.71 ft at 11:45PM Mar 18, 2023Observed: 4.7 ft at 12:00AM Mar 19, 2023Observed: 4.7 ft at 12:15AM Mar 19, 2023Observed: 4.7 ft at 12:30AM Mar 19, 2023Observed: 4.7 ft at 12:45AM Mar 19, 2023Observed: 4.71 ft at 1:00AM Mar 19, 2023Observed: 4.69 ft at 1:15AM Mar 19, 2023Observed: 4.7 ft at 1:30AM Mar 19, 2023Observed: 4.71 ft at 1:45AM Mar 19, 2023Observed: 4.7 ft at 2:00AM Mar 19, 2023Observed: 4.69 ft at 2:15AM Mar 19, 2023Observed: 4.69 ft at 2:30AM Mar 19, 2023Observed: 4.7 ft at 2:45AM Mar 19, 2023Observed: 4.7 ft at 3:00AM Mar 19, 2023Observed: 4.71 ft at 3:15AM Mar 19, 2023Observed: 4.71 ft at 3:30AM Mar 19, 2023Observed: 4.69 ft at 3:45AM Mar 19, 2023Observed: 4.71 ft at 4:00AM Mar 19, 2023Observed: 4.69 ft at 4:15AM Mar 19, 2023Observed: 4.71 ft at 4:30AM Mar 19, 2023Observed: 4.72 ft at 4:45AM Mar 19, 2023Observed: 4.72 ft at 5:00AM Mar 19, 2023Observed: 4.71 ft at 5:15AM Mar 19, 2023Observed: 4.7 ft at 5:30AM Mar 19, 2023Observed: 4.7 ft at 5:45AM Mar 19, 2023Observed: 4.71 ft at 6:00AM Mar 19, 2023Observed: 4.69 ft at 6:15AM Mar 19, 2023Observed: 4.69 ft at 6:30AM Mar 19, 2023Observed: 4.67 ft at 6:45AM Mar 19, 2023Observed: 4.67 ft at 7:00AM Mar 19, 2023Observed: 4.68 ft at 7:15AM Mar 19, 2023Observed: 4.66 ft at 7:30AM Mar 19, 2023Observed: 4.67 ft at 7:45AM Mar 19, 2023Observed: 4.66 ft at 8:00AM Mar 19, 2023Observed: 4.67 ft at 8:15AM Mar 19, 2023Observed: 4.66 ft at 8:30AM Mar 19, 2023Observed: 4.67 ft at 8:45AM Mar 19, 2023Observed: 4.67 ft at 9:00AM Mar 19, 2023Observed: 4.66 ft at 9:15AM Mar 19, 2023Observed: 4.66 ft at 9:30AM Mar 19, 2023Observed: 4.66 ft at 9:45AM Mar 19, 2023Observed: 4.66 ft at 10:00AM Mar 19, 2023Observed: 4.65 ft at 10:15AM Mar 19, 2023Observed: 4.64 ft at 10:30AM Mar 19, 2023Observed: 4.65 ft at 10:45AM Mar 19, 2023Observed: 4.65 ft at 11:00AM Mar 19, 2023Observed: 4.64 ft at 11:15AM Mar 19, 2023Observed: 4.65 ft at 11:30AM Mar 19, 2023Observed: 4.64 ft at 11:45AM Mar 19, 2023Observed: 4.63 ft at 12:00PM Mar 19, 2023Observed: 4.63 ft at 12:15PM Mar 19, 2023Observed: 4.63 ft at 12:16PM Mar 19, 2023Observed: 4.62 ft at 12:30PM Mar 19, 2023Observed: 4.63 ft at 12:45PM Mar 19, 2023Observed: 4.62 ft at 1:00PM Mar 19, 2023Observed: 4.6 ft at 1:15PM Mar 19, 2023Observed: 4.61 ft at 1:30PM Mar 19, 2023Observed: 4.61 ft at 1:45PM Mar 19, 2023Observed: 4.61 ft at 2:00PM Mar 19, 2023Observed: 4.61 ft at 2:15PM Mar 19, 2023Observed: 4.61 ft at 2:30PM Mar 19, 2023Observed: 4.61 ft at 2:45PM Mar 19, 2023Observed: 4.61 ft at 3:00PM Mar 19, 2023Observed: 4.61 ft at 3:15PM Mar 19, 2023Observed: 4.6 ft at 3:30PM Mar 19, 2023Observed: 4.6 ft at 3:45PM Mar 19, 2023Observed: 4.59 ft at 4:00PM Mar 19, 2023Observed: 4.6 ft at 4:15PM Mar 19, 2023Observed: 4.59 ft at 4:30PM Mar 19, 2023Observed: 4.58 ft at 4:45PM Mar 19, 2023Observed: 4.58 ft at 5:00PM Mar 19, 2023Observed: 4.55 ft at 5:15PM Mar 19, 2023Observed: 4.58 ft at 5:30PM Mar 19, 2023Observed: 4.56 ft at 5:45PM Mar 19, 2023Observed: 4.57 ft at 6:00PM Mar 19, 2023Observed: 4.57 ft at 6:15PM Mar 19, 2023Observed: 4.57 ft at 6:30PM Mar 19, 2023Observed: 4.55 ft at 6:45PM Mar 19, 2023Observed: 4.56 ft at 7:00PM Mar 19, 2023Observed: 4.55 ft at 7:15PM Mar 19, 2023Observed: 4.54 ft at 7:30PM Mar 19, 2023Observed: 4.53 ft at 7:45PM Mar 19, 2023Observed: 4.54 ft at 8:00PM Mar 19, 2023Observed: 4.54 ft at 8:15PM Mar 19, 2023Observed: 4.52 ft at 8:30PM Mar 19, 2023Observed: 4.51 ft at 8:45PM Mar 19, 2023Observed: 4.54 ft at 9:00PM Mar 19, 2023Observed: 4.53 ft at 9:15PM Mar 19, 2023Observed: 4.52 ft at 9:30PM Mar 19, 2023Observed: 4.52 ft at 9:45PM Mar 19, 2023Observed: 4.51 ft at 10:00PM Mar 19, 2023Observed: 4.51 ft at 10:15PM Mar 19, 2023Observed: 4.51 ft at 10:30PM Mar 19, 2023Observed: 4.51 ft at 10:45PM Mar 19, 2023Observed: 4.5 ft at 11:00PM Mar 19, 2023Observed: 4.49 ft at 11:15PM Mar 19, 2023Observed: 4.51 ft at 11:30PM Mar 19, 2023Observed: 4.51 ft at 11:45PM Mar 19, 2023Observed: 4.5 ft at 12:00AM Mar 20, 2023Observed: 4.5 ft at 12:15AM Mar 20, 2023Observed: 4.49 ft at 12:30AM Mar 20, 2023Observed: 4.49 ft at 12:45AM Mar 20, 2023Observed: 4.48 ft at 1:00AM Mar 20, 2023Observed: 4.49 ft at 1:15AM Mar 20, 2023Observed: 4.47 ft at 1:30AM Mar 20, 2023Observed: 4.46 ft at 1:45AM Mar 20, 2023Observed: 4.47 ft at 2:00AM Mar 20, 2023Observed: 4.48 ft at 2:15AM Mar 20, 2023Observed: 4.48 ft at 2:30AM Mar 20, 2023Observed: 4.47 ft at 2:45AM Mar 20, 2023Observed: 4.46 ft at 3:00AM Mar 20, 2023Observed: 4.46 ft at 3:15AM Mar 20, 2023Observed: 4.47 ft at 3:30AM Mar 20, 2023Observed: 4.47 ft at 3:45AM Mar 20, 2023Observed: 4.47 ft at 4:00AM Mar 20, 2023Observed: 4.46 ft at 4:15AM Mar 20, 2023Observed: 4.46 ft at 4:30AM Mar 20, 2023Observed: 4.45 ft at 4:45AM Mar 20, 2023Observed: 4.47 ft at 5:00AM Mar 20, 2023Observed: 4.46 ft at 5:15AM Mar 20, 2023Observed: 4.45 ft at 5:30AM Mar 20, 2023Observed: 4.45 ft at 5:45AM Mar 20, 2023Observed: 4.43 ft at 6:00AM Mar 20, 2023Observed: 4.45 ft at 6:15AM Mar 20, 2023Observed: 4.44 ft at 6:30AM Mar 20, 2023Observed: 4.45 ft at 6:45AM Mar 20, 2023Observed: 4.44 ft at 7:00AM Mar 20, 2023Observed: 4.43 ft at 7:15AM Mar 20, 2023Observed: 4.45 ft at 7:30AM Mar 20, 2023Observed: 4.43 ft at 7:45AM Mar 20, 2023Observed: 4.43 ft at 8:00AM Mar 20, 2023Observed: 4.43 ft at 8:15AM Mar 20, 2023Observed: 4.43 ft at 8:30AM Mar 20, 2023Observed: 4.42 ft at 8:45AM Mar 20, 2023Observed: 4.42 ft at 9:00AM Mar 20, 2023Observed: 4.42 ft at 9:15AM Mar 20, 2023Observed: 4.43 ft at 9:30AM Mar 20, 2023Observed: 4.42 ft at 9:45AM Mar 20, 2023Observed: 4.39 ft at 10:00AM Mar 20, 2023Observed: 4.41 ft at 10:15AM Mar 20, 2023Observed: 4.41 ft at 10:30AM Mar 20, 2023Observed: 4.41 ft at 10:45AM Mar 20, 2023Observed: 4.41 ft at 11:00AM Mar 20, 2023Observed: 4.41 ft at 11:15AM Mar 20, 2023Observed: 4.41 ft at 11:30AM Mar 20, 2023Observed: 4.4 ft at 11:45AM Mar 20, 2023Observed: 4.4 ft at 12:00PM Mar 20, 2023Observed: 4.39 ft at 12:15PM Mar 20, 2023Observed: 4.39 ft at 12:30PM Mar 20, 2023Observed: 4.4 ft at 12:45PM Mar 20, 2023Observed: 4.4 ft at 1:00PM Mar 20, 2023Observed: 4.38 ft at 1:15PM Mar 20, 2023Observed: 4.39 ft at 1:30PM Mar 20, 2023Observed: 4.37 ft at 1:45PM Mar 20, 2023Observed: 4.39 ft at 2:00PM Mar 20, 2023Observed: 4.39 ft at 2:15PM Mar 20, 2023USGS--Water Resources of the United StatesCVTC3(plotting HGIRG) Graph Created (3:15PM Mar 20, 2023)ObservedLatest observed value: 4.39 ft at 2:15 PM EDT 20-Mar-2023. Flood Stage is 8 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: Forecasts are not available for the Willimantic River at Coventry. Only observed stages are available for this point.
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Flood Categories (in feet)
Major Flood Stage: 14
Moderate Flood Stage: 11
Flood Stage: 8
Action Stage: 7
Low Stage (in feet): -9999

Historic Crests
(1) 18.66 ft on 08/19/1955
(2) 18.08 ft on 09/21/1938
(3) 14.81 ft on 10/15/2005
(4) 12.19 ft on 03/12/1936
(5) 11.64 ft on 06/05/1982
(6) 11.28 ft on 07/10/2021 (P)
(7) 11.12 ft on 03/07/2011
(8) 10.94 ft on 05/31/1984
(9) 10.91 ft on 01/25/1979
(10) 10.83 ft on 01/26/1978
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 10.47 ft on 09/02/2021 (P)
(2) 9.75 ft on 07/18/2021 (P)
(3) 11.28 ft on 07/10/2021 (P)
(4) 9.00 ft on 12/26/2020 (P)
(5) 8.15 ft on 04/27/2019
(6) 9.23 ft on 01/25/2019
(7) 8.19 ft on 09/26/2018
(8) 8.41 ft on 04/17/2018
(9) 8.75 ft on 01/13/2018
(10) 8.11 ft on 10/30/2017
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
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
14.5 Numerous roads are impacted in Coventry and Mansfield. This includes the following, Thornbush Road, Route 275, Depot Road, Cider Mill and Flanders River Roads, and Route 44 near the Mansfield/Coventry town line.
13.5 Floodwaters reaach base of Merrow Road Bridge.
10.5 Floodwaters inundate meadow Merrow Park near bridge.
8 Floodwaters reach the lowest lying sections of Thornbush and Flanders River Roads in Mansfield and Coventry.
About This Location Collapse

Latitude: 41.750654° N, Longitude: 72.265635° W, Horizontal Datum: NAD27

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 8 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 29 239.05 247.05 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:
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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.
NWS Information
National Weather Service
Boston / Norton Weather Forecast Office
46 Commerce Way
Norton, MA 02766
(508) 622-3250
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