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Willimantic River at Coventry

Highest listed crest 18.66 ftFlood stage 8.0 ft83 crests since 1934

The Willimantic River at Coventry crested at major flood stage 3 times among the 83 crests the National Weather Service lists from 1934 to 2024. The highest, 18.66 ft on August 19, 1955, was major flooding, 10.66 feet above flood stage.

The gauge

Highest listed crest
18.66 ft
August 19, 1955; 242,005 cubic feet per second
Flood stage
8.0 ft
Major flooding from 14.0 ft
Crests at major
3
10th of 26 gauges in Connecticut
Most recent flood crest
January 10, 2024
9.67 ft, minor flooding
Location
Tolland County
Connecticut

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Willimantic River at Coventry
Action stage7.012Mar 22, 2003The level at which the NWS or its partners begin to take action
Flood stage (minor)8.064Jan 10, 2024Minimal or no property damage, but possibly some public threat
Moderate flood stage11.04Jul 10, 2021Some inundation of structures and roads near the stream
Major flood stage14.03Oct 15, 2005Extensive inundation of structures and roads

Every listed crest

83 crests from 1934 to 2024. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Willimantic River at Coventry, 1934 to 2024 5101520ft Flood stage 8.0 ftMajor 14.0 ft Mar 6, 1934: 10.30 ft, minor flooding; 44,205 cubic feet per secondJun 6, 1934: 10.30 ft, minor flooding; 4,420 cubic feet per secondJan 10, 1935: 8.26 ft, minor flooding; 22,205 cubic feet per secondMar 12, 1936: 12.19 ft, moderate flooding; 78,805 cubic feet per secondDec 20, 1936: 7.56 ft, action stage; 16,605 cubic feet per secondSep 21, 1938: 18.08 ft, major flooding; 15,500 cubic feet per secondFeb 16, 1939: 8.19 ft, minor flooding; 21,005 cubic feet per secondJan 15, 1940: 9.59 ft, minor flooding; 34,005 cubic feet per secondFeb 8, 1941: 9.01 ft, minor flooding; 26,605 cubic feet per secondMar 9, 1942: 8.16 ft, minor flooding; 18,805 cubic feet per secondDec 31, 1942: 8.37 ft, minor flooding; 20,405 cubic feet per secondJun 25, 1944: 8.43 ft, minor flooding; 21,205 cubic feet per secondJan 2, 1945: 7.58 ft, action stage; 15,105 cubic feet per secondMar 21, 1948: 8.25 ft, minor flooding; 22,405 cubic feet per secondFeb 8, 1951: 8.25 ft, minor flooding; 22,405 cubic feet per secondDec 21, 1951: 7.56 ft, action stage; 18,005 cubic feet per secondMar 16, 1953: 8.49 ft, minor flooding; 23,005 cubic feet per secondSep 12, 1954: 9.37 ft, minor flooding; 31,005 cubic feet per secondAug 19, 1955: 18.66 ft, major flooding; 242,005 cubic feet per secondOct 16, 1955: 9.29 ft, minor flooding; 29,905 cubic feet per secondJan 23, 1957: 7.56 ft, action stage; 14,205 cubic feet per secondApr 7, 1958: 7.58 ft, action stage; 14,505 cubic feet per secondMar 7, 1959: 9.22 ft, minor flooding; 28,405 cubic feet per secondApr 1, 1960: 9.34 ft, minor flooding; 29,505 cubic feet per secondFeb 26, 1961: 8.39 ft, minor flooding; 20,605 cubic feet per secondApr 1, 1962: 7.35 ft, action stage; 13,205 cubic feet per secondMar 27, 1963: 7.45 ft, action stage; 13,605 cubic feet per secondJan 25, 1964: 7.30 ft, action stage; 12,900 cubic feet per secondMay 26, 1967: 8.73 ft, minor flooding; 23,606 cubic feet per secondMar 19, 1968: 9.22 ft, minor flooding; 28,605 cubic feet per secondMar 25, 1969: 8.36 ft, minor flooding; 20,205 cubic feet per secondFeb 4, 1970: 10.35 ft, minor flooding; 42,705 cubic feet per secondMar 3, 1972: 9.67 ft, minor flooding; 33,705 cubic feet per secondFeb 3, 1973: 9.82 ft, minor flooding; 35,605 cubic feet per secondDec 21, 1973: 10.48 ft, minor flooding; 44,705 cubic feet per secondSep 27, 1975: 8.78 ft, minor flooding; 26,905 cubic feet per secondMar 14, 1977: 7.82 ft, action stage; 18,905 cubic feet per secondJan 26, 1978: 10.83 ft, minor flooding; 49,805 cubic feet per secondJan 25, 1979: 10.91 ft, minor flooding; 51,105 cubic feet per secondApr 10, 1980: 8.24 ft, minor flooding; 22,105 cubic feet per secondFeb 24, 1981: 7.51 ft, action stage; 17,305 cubic feet per secondJun 5, 1982: 11.64 ft, moderate flooding; 64,805 cubic feet per secondApr 20, 1983: 9.89 ft, minor flooding; 37,505 cubic feet per secondMay 31, 1984: 10.94 ft, minor flooding; 51,605 cubic feet per secondJan 27, 1986: 8.85 ft, minor flooding; 26,705 cubic feet per secondApr 1, 1987: 10.09 ft, minor flooding; 39,805 cubic feet per secondAug 13, 1989: 8.81 ft, minor flooding; 26,405 cubic feet per secondOct 21, 1989: 9.61 ft, minor flooding; 34,305 cubic feet per secondAug 19, 1991: 7.49 ft, action stage; 17,005 cubic feet per secondMar 30, 1993: 9.56 ft, minor flooding; 33,705 cubic feet per secondDec 5, 1993: 8.00 ft, minor flooding; 20,305 cubic feet per secondApr 17, 1996: 10.43 ft, minor flooding; 39,605 cubic feet per secondDec 2, 1996: 8.23 ft, minor flooding; 21,905 cubic feet per secondMar 10, 1998: 10.06 ft, minor flooding; 39,405 cubic feet per secondMar 9, 1999: 9.54 ft, minor flooding; 33,505 cubic feet per secondMar 22, 2003: 7.35 ft, action stage; 16,205 cubic feet per secondDec 18, 2003: 8.46 ft, minor flooding; 23,605 cubic feet per secondJan 14, 2005: 8.11 ft, minor flooding; 21,000 cubic feet per secondOct 15, 2005: 14.81 ft, major floodingSep 7, 2008: 8.73 ft, minor floodingDec 12, 2008: 8.88 ft, minor floodingMar 31, 2010: 9.31 ft, minor flooding; 3,112 cubic feet per secondMar 7, 2011: 11.12 ft, moderate flooding; 5,442 cubic feet per secondMar 12, 2011: 8.82 ft, minor flooding; 2,771 cubic feet per secondApr 17, 2011: 8.73 ft, minor flooding; 2,693 cubic feet per secondAug 29, 2011: 9.12 ft, minor flooding; 3,040 cubic feet per secondDec 8, 2011: 8.40 ft, minor flooding; 2,423 cubic feet per secondJun 8, 2013: 8.56 ft, minor flooding; 2,550 cubic feet per secondJun 14, 2013: 8.75 ft, minor flooding; 2,710 cubic feet per secondMar 30, 2014: 8.19 ft, minor flooding; 2,267 cubic feet per secondOct 30, 2017: 8.11 ft, minor flooding; 2,259 cubic feet per secondJan 13, 2018: 8.75 ft, minor flooding; 2,723 cubic feet per secondApr 17, 2018: 8.41 ft, minor flooding; 2,458 cubic feet per secondSep 26, 2018: 8.19 ft, minor flooding; 2,311 cubic feet per secondJan 25, 2019: 9.23 ft, minor flooding; 3,147 cubic feet per secondApr 27, 2019: 8.15 ft, minor flooding; 2,285 cubic feet per secondDec 26, 2020: 9.00 ft, minor flooding; 2,939 cubic feet per secondJul 10, 2021: 11.28 ft, moderate flooding; 5,671 cubic feet per secondJul 18, 2021: 9.75 ft, minor flooding; 3,677 cubic feet per secondSep 2, 2021: 10.47 ft, minor flooding; 4,055 cubic feet per secondDec 11, 2023: 8.29 ft, minor flooding; 2,276 cubic feet per secondDec 19, 2023: 9.95 ft, minor flooding; 3,533 cubic feet per secondJan 10, 2024: 9.67 ft, minor flooding; 3,278 cubic feet per second Highest, 18.66 ft, Aug 19, 1955 19401960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Willimantic River at Coventry 1930s: 6 1940s: 6 1950s: 6 1960s: 5 1970s: 7 1980s: 8 1990s: 6 2000s: 5 2010s: 15 15 2020s: 7 1930s1940s1950s1960s1970s1980s1990s2000s2010s2020s
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

The 50 highest of 83 listed crests.

Highest listed crests, Willimantic River at Coventry
1Aug 19, 195518.66+10.66Major242,005
2Sep 21, 193818.08+10.08Major15,500
3Oct 15, 200514.81+6.81Major—
4Mar 12, 193612.19+4.19Moderate78,805
5Jun 5, 198211.64+3.64Moderate64,805
6Jul 10, 202111.28+3.28Moderate5,671
7Mar 7, 201111.12+3.12Moderate5,442
8May 31, 198410.94+2.94Minor51,605
9Jan 25, 197910.91+2.91Minor51,105
10Jan 26, 197810.83+2.83Minor49,805
11Dec 21, 197310.48+2.48Minor44,705
12Sep 2, 202110.47+2.47Minor4,055
13Apr 17, 199610.43+2.43Minor39,605
14Feb 4, 197010.35+2.35Minor42,705
15Mar 6, 193410.30+2.30Minor44,205
16Jun 6, 193410.30+2.30Minor4,420
17Apr 1, 198710.09+2.09Minor39,805
18Mar 10, 199810.06+2.06Minor39,405
19Dec 19, 20239.95+1.95Minor3,533
20Apr 20, 19839.89+1.89Minor37,505
21Feb 3, 19739.82+1.82Minor35,605
22Jul 18, 20219.75+1.75Minor3,677
23Mar 3, 19729.67+1.67Minor33,705
24Jan 10, 20249.67+1.67Minor3,278
25Oct 21, 19899.61+1.61Minor34,305
26Jan 15, 19409.59+1.59Minor34,005
27Mar 30, 19939.56+1.56Minor33,705
28Mar 9, 19999.54+1.54Minor33,505
29Sep 12, 19549.37+1.37Minor31,005
30Apr 1, 19609.34+1.34Minor29,505
31Mar 31, 20109.31+1.31Minor3,112
32Oct 16, 19559.29+1.29Minor29,905
33Jan 25, 20199.23+1.23Minor3,147
34Mar 7, 19599.22+1.22Minor28,405
35Mar 19, 19689.22+1.22Minor28,605
36Aug 29, 20119.12+1.12Minor3,040
37Feb 8, 19419.01+1.01Minor26,605
38Dec 26, 20209.00+1.00Minor2,939
39Dec 12, 20088.88+0.88Minor—
40Jan 27, 19868.85+0.85Minor26,705
41Mar 12, 20118.82+0.82Minor2,771
42Aug 13, 19898.81+0.81Minor26,405
43Sep 27, 19758.78+0.78Minor26,905
44Jun 14, 20138.75+0.75Minor2,710
45Jan 13, 20188.75+0.75Minor2,723
46May 26, 19678.73+0.73Minor23,606
47Sep 7, 20088.73+0.73Minor—
48Apr 17, 20118.73+0.73Minor2,693
49Jun 8, 20138.56+0.56Minor2,550
50Mar 16, 19538.49+0.49Minor23,005

Tolland County: every hazard · River floods across the country · Connecticut

NOAA National Water Prediction Service, gauge CVTC3, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.