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Connecticut River at Thompsonville

Highest listed crest 26.60 ftFlood stage 15.0 ft97 crests since 1929

The Connecticut River at Thompsonville crested at major flood stage 7 times among the 97 crests the National Weather Service lists from 1929 to 2025. The highest, 26.60 ft on March 20, 1936, was major flooding, 11.60 feet above flood stage. 9 other gauges on the Connecticut River crested above flood stage within a week of it, 8 at their own highest listed crest.

The gauge

Highest listed crest
26.60 ft
March 20, 1936; 828,000 cubic feet per second
Flood stage
15.0 ft
Major flooding from 19.0 ft
Crests at major
7
4th of 26 gauges in Connecticut
Most recent flood crest
May 11, 2025
15.41 ft, minor flooding
Location
Hartford County
Near Agawam Town (5.8 mi), Springfield (9.5 mi), West Springfield Town (9.8 mi)

Flood stages

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

Flood categories, Connecticut River at Thompsonville
Action stage14.08Apr 17, 2002The level at which the NWS or its partners begin to take action
Flood stage (minor)15.058May 11, 2025Minimal or no property damage, but possibly some public threat
Moderate flood stage17.024Jul 12, 2023Some inundation of structures and roads near the stream
Major flood stage19.07May 31, 1984Extensive inundation of structures and roads

Every listed crest

97 crests from 1929 to 2025. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Connecticut River at Thompsonville, 1929 to 2025 1015202530ft Flood stage 15.0 ftMajor 19.0 ft Mar 25, 1929: 17.49 ft, moderate flooding; 84,800 cubic feet per secondApr 9, 1930: 16.28 ft, minor flooding; 57,600 cubic feet per secondApr 14, 1931: 18.28 ft, moderate flooding; 98,400 cubic feet per secondApr 20, 1933: 20.47 ft, major flooding; 153,000 cubic feet per secondApr 14, 1934: 18.96 ft, moderate flooding; 124,000 cubic feet per secondJan 11, 1935: 18.14 ft, moderate flooding; 100,000 cubic feet per secondMar 20, 1936: 26.60 ft, major flooding; 828,000 cubic feet per secondMay 16, 1937: 17.42 ft, moderate flooding; 103,000 cubic feet per secondJul 23, 1938: 24.40 ft, major flooding; 236,000 cubic feet per secondApr 24, 1939: 17.36 ft, moderate flooding; 103,000 cubic feet per secondMay 6, 1940: 18.42 ft, moderate flooding; 121,000 cubic feet per secondApr 16, 1941: 14.40 ft, action stage; 500,005 cubic feet per secondApr 9, 1942: 15.70 ft, minor flooding; 73,200 cubic feet per secondApr 29, 1943: 15.80 ft, minor flooding; 75,000 cubic feet per secondApr 26, 1944: 15.83 ft, minor flooding; 75,400 cubic feet per secondMar 22, 1945: 16.92 ft, minor flooding; 95,000 cubic feet per secondMar 11, 1946: 15.88 ft, minor flooding; 75,800 cubic feet per secondApr 14, 1947: 17.05 ft, moderate flooding; 97,000 cubic feet per secondMar 23, 1948: 18.93 ft, moderate flooding; 131,000 cubic feet per secondJan 1, 1949: 19.30 ft, major flooding; 138,000 cubic feet per secondApr 6, 1950: 16.30 ft, minor flooding; 84,300 cubic feet per secondApr 1, 1951: 17.52 ft, moderate flooding; 106,000 cubic feet per secondMar 28, 1952: 18.60 ft, moderate flooding; 131,000 cubic feet per secondApr 19, 1954: 16.00 ft, minor flooding; 83,500 cubic feet per secondAug 19, 1955: 20.93 ft, major flooding; 174,000 cubic feet per secondMay 1, 1956: 17.40 ft, moderate flooding; 110,000 cubic feet per secondJan 25, 1957: 14.07 ft, action stage; 471,005 cubic feet per secondApr 24, 1958: 17.36 ft, moderate flooding; 109,000 cubic feet per secondApr 5, 1959: 16.86 ft, minor flooding; 99,700 cubic feet per secondApr 6, 1960: 20.01 ft, major flooding; 156,000 cubic feet per secondApr 25, 1961: 15.62 ft, minor flooding; 76,400 cubic feet per secondApr 2, 1962: 16.91 ft, minor flooding; 101,000 cubic feet per secondApr 4, 1963: 16.20 ft, minor flooding; 87,200 cubic feet per secondApr 6, 1964: 16.06 ft, minor flooding; 84,600 cubic feet per secondMar 27, 1966: 14.88 ft, action stage; 592,005 cubic feet per secondApr 4, 1967: 16.19 ft, minor flooding; 84,000 cubic feet per secondMar 25, 1968: 17.29 ft, moderate flooding; 105,000 cubic feet per secondApr 23, 1969: 17.53 ft, moderate flooding; 109,000 cubic feet per secondApr 27, 1970: 15.91 ft, minor flooding; 78,700 cubic feet per secondMay 5, 1971: 15.89 ft, minor flooding; 78,400 cubic feet per secondMay 6, 1972: 16.55 ft, minor flooding; 90,900 cubic feet per secondMar 19, 1973: 17.04 ft, moderate flooding; 100,000 cubic feet per secondDec 23, 1974: 17.00 ft, moderate flooding; 99,400 cubic feet per secondApr 22, 1975: 15.37 ft, minor flooding; 68,500 cubic feet per secondApr 3, 1976: 17.45 ft, moderate flooding; 107,000 cubic feet per secondMar 15, 1977: 17.79 ft, moderate flooding; 114,000 cubic feet per secondOct 16, 1978: 15.42 ft, minor flooding; 69,600 cubic feet per secondMar 27, 1979: 16.84 ft, minor flooding; 112,000 cubic feet per secondApr 11, 1980: 15.80 ft, minor flooding; 86,700 cubic feet per secondFeb 26, 1981: 16.88 ft, minor flooding; 113,000 cubic feet per secondApr 27, 1983: 15.58 ft, minor flooding; 84,800 cubic feet per secondMay 31, 1984: 20.80 ft, major flooding; 184,000 cubic feet per secondApr 1, 1986: 16.77 ft, minor flooding; 92,300 cubic feet per secondApr 1, 1987: 18.74 ft, moderate flooding; 152,000 cubic feet per secondMay 1, 1988: 15.16 ft, minor flooding; 78,500 cubic feet per secondMay 7, 1989: 15.80 ft, minor flooding; 93,900 cubic feet per secondMar 18, 1990: 16.08 ft, minor flooding; 101,000 cubic feet per secondDec 25, 1990: 14.96 ft, action stage; 813,005 cubic feet per secondApr 26, 1992: 14.44 ft, action stage; 743,005 cubic feet per secondApr 12, 1993: 15.95 ft, minor flooding; 95,000 cubic feet per secondJan 28, 1996: 15.70 ft, minor floodingApr 17, 1996: 16.75 ft, minor flooding; 113,000 cubic feet per secondMay 14, 1996: 16.30 ft, minor floodingApr 1, 1998: 16.60 ft, minor flooding; 111,000 cubic feet per secondSep 18, 1999: 14.51 ft, action stage; 808,005 cubic feet per secondApr 6, 2000: 14.66 ft, action stage; 823,005 cubic feet per secondApr 17, 2002: 14.33 ft, action stage; 759,005 cubic feet per secondMar 31, 2003: 15.61 ft, minor flooding; 88,700 cubic feet per secondOct 31, 2003: 15.83 ft, minor flooding; 92,200 cubic feet per secondApr 2, 2004: 16.09 ft, minor flooding; 96,100 cubic feet per secondApr 4, 2005: 16.60 ft, minor flooding; 105,000 cubic feet per secondOct 10, 2005: 17.21 ft, moderate flooding; 114,000 cubic feet per secondOct 16, 2005: 15.32 ft, minor flooding; 85,120 cubic feet per secondOct 27, 2005: 15.92 ft, minor flooding; 94,720 cubic feet per secondApr 17, 2007: 17.01 ft, moderate flooding; 111,000 cubic feet per secondMar 11, 2008: 15.10 ft, minor flooding; 81,400 cubic feet per secondApr 15, 2008: 15.23 ft, minor flooding; 85,700 cubic feet per secondDec 13, 2008: 15.27 ft, minor flooding; 87,000 cubic feet per secondMar 25, 2010: 15.47 ft, minor flooding; 86,580 cubic feet per secondApr 1, 2010: 15.97 ft, minor flooding; 96,900 cubic feet per secondApr 14, 2011: 15.46 ft, minor floodingApr 18, 2011: 15.35 ft, minor floodingAug 30, 2011: 17.82 ft, moderate flooding; 128,000 cubic feet per secondSep 8, 2011: 16.05 ft, minor floodingApr 17, 2014: 15.66 ft, minor flooding; 92,500 cubic feet per secondFeb 27, 2016: 15.59 ft, minor flooding; 91,500 cubic feet per secondDec 23, 2018: 15.34 ft, minor flooding; 536,907 cubic feet per secondApr 17, 2019: 15.54 ft, minor flooding; 541,867 cubic feet per secondApr 23, 2019: 15.18 ft, minor flooding; 532,958 cubic feet per secondApr 28, 2019: 15.34 ft, minor flooding; 536,917 cubic feet per secondDec 27, 2020: 15.08 ft, minor flooding; 530,473 cubic feet per secondJul 12, 2023: 17.01 ft, moderate flooding; 11,300 cubic feet per secondDec 19, 2023: 16.56 ft, minor flooding; 1,062,040 cubic feet per secondMar 8, 2024: 15.27 ft, minor flooding; 11,918,795 cubic feet per secondApr 14, 2024: 15.53 ft, minor flooding; 293,397 cubic feet per secondMar 18, 2025: 15.30 ft, minor flooding; 287,527 cubic feet per secondMay 11, 2025: 15.41 ft, minor flooding; 288,100 cubic feet per second Highest, 26.60 ft, Mar 20, 1936 19401960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Connecticut River at Thompsonville 1920s: 1 1930s: 9 1940s: 9 1950s: 8 1960s: 8 1970s: 10 1980s: 8 1990s: 6 2000s: 11 2010s: 12 12 2020s: 7 1920s1930s1940s1950s1960s1970s1980s1990s2000s2010s2020s
  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 97 listed crests.

Highest listed crests, Connecticut River at Thompsonville
1Mar 20, 193626.60+11.60Major828,000
2Jul 23, 193824.40+9.40Major236,000
3Aug 19, 195520.93+5.93Major174,000
4May 31, 198420.80+5.80Major184,000
5Apr 20, 193320.47+5.47Major153,000
6Apr 6, 196020.01+5.01Major156,000
7Jan 1, 194919.30+4.30Major138,000
8Apr 14, 193418.96+3.96Moderate124,000
9Mar 23, 194818.93+3.93Moderate131,000
10Apr 1, 198718.74+3.74Moderate152,000
11Mar 28, 195218.60+3.60Moderate131,000
12May 6, 194018.42+3.42Moderate121,000
13Apr 14, 193118.28+3.28Moderate98,400
14Jan 11, 193518.14+3.14Moderate100,000
15Aug 30, 201117.82+2.82Moderate128,000
16Mar 15, 197717.79+2.79Moderate114,000
17Apr 23, 196917.53+2.53Moderate109,000
18Apr 1, 195117.52+2.52Moderate106,000
19Mar 25, 192917.49+2.49Moderate84,800
20Apr 3, 197617.45+2.45Moderate107,000
21May 16, 193717.42+2.42Moderate103,000
22May 1, 195617.40+2.40Moderate110,000
23Apr 24, 193917.36+2.36Moderate103,000
24Apr 24, 195817.36+2.36Moderate109,000
25Mar 25, 196817.29+2.29Moderate105,000
26Oct 10, 200517.21+2.21Moderate114,000
27Apr 14, 194717.05+2.05Moderate97,000
28Mar 19, 197317.04+2.04Moderate100,000
29Apr 17, 200717.01+2.01Moderate111,000
30Jul 12, 202317.01+2.01Moderate11,300
31Dec 23, 197417.00+2.00Moderate99,400
32Mar 22, 194516.92+1.92Minor95,000
33Apr 2, 196216.91+1.91Minor101,000
34Feb 26, 198116.88+1.88Minor113,000
35Apr 5, 195916.86+1.86Minor99,700
36Mar 27, 197916.84+1.84Minor112,000
37Apr 1, 198616.77+1.77Minor92,300
38Apr 17, 199616.75+1.75Minor113,000
39Apr 1, 199816.60+1.60Minor111,000
40Apr 4, 200516.60+1.60Minor105,000
41Dec 19, 202316.56+1.56Minor1,062,040
42May 6, 197216.55+1.55Minor90,900
43Apr 6, 195016.30+1.30Minor84,300
44May 14, 199616.30+1.30Minor—
45Apr 9, 193016.28+1.28Minor57,600
46Apr 4, 196316.20+1.20Minor87,200
47Apr 4, 196716.19+1.19Minor84,000
48Apr 2, 200416.09+1.09Minor96,100
49Mar 18, 199016.08+1.08Minor101,000
50Apr 6, 196416.06+1.06Minor84,600

The worst floods along the Connecticut River

For this gauge's highest crests, the other gauges on the Connecticut River that crested above flood stage within a week.

March 20, 1936: 26.60 ft here, major flooding

  • NorthamptonMA · Mar 19, 1936 · 129.40 ft · Major · its highest
  • MontagueMA · Mar 19, 1936 · 49.20 ft · Major · its highest
  • North WalpoleNH · Mar 19, 1936 · 43.80 ft · Major · its highest
  • HartfordCT · Mar 21, 1936 · 37.60 ft · Major · its highest
  • West LebanonNH · Mar 19, 1936 · 32.60 ft · Major
  • SpringfieldMA · Mar 20, 1936 · 28.60 ft · Major · its highest
  • DaltonNH · Mar 20, 1936 · 25.60 ft · Major · its highest
  • Holyoke - UpperMA · Mar 19, 1936 · 16.80 ft · Major · its highest
  • North StratfordNH · Mar 13, 1936 · 16.66 ft · Moderate · its highest

August 19, 1955: 20.93 ft here, major flooding

May 31, 1984: 20.80 ft here, major flooding

  • NorthamptonMA · May 31, 1984 · 120.80 ft · Major
  • HartfordCT · Jun 1, 1984 · 30.74 ft · Major
  • Holyoke - UpperMA · May 31, 1984 · 12.01 ft · Major
  • MontagueMA · May 31, 1984 · 38.17 ft · Moderate
  • SpringfieldMA · Jun 1, 1984 · 22.65 ft · Moderate
  • Wells RiverVT · May 31, 1984 · 15.03 ft · Moderate
  • DaltonNH · Jun 1, 1984 · 20.30 ft · Minor

Gauges on the Connecticut River

Flood gauges sharing the river's name, linked within 80 miles of one another.

Flood gauges on the Connecticut River
DaltonNH18.025.60 ft, Mar 20, 19363
HartfordCT16.037.60 ft, Mar 21, 19367
HolyokeMA26.527.73 ft, Aug 30, 20110
Holyoke - UpperMA9.016.80 ft, Mar 19, 193610
Middle HaddamCT7.011.20 ft, Dec 21, 20230
MontagueMA28.049.20 ft, Mar 19, 19362
North StratfordNH13.016.66 ft, Mar 13, 19360
North WalpoleNH28.043.80 ft, Mar 19, 19362
NorthamptonMA112.0129.40 ft, Mar 19, 19363
SpringfieldMA20.028.60 ft, Mar 20, 19362
Thompsonville this gaugeCT15.026.60 ft, Mar 20, 19367
Wells RiverVT12.017.35 ft, Jul 1, 19731
West LebanonNH23.035.00 ft, Nov 4, 19274

Other gauges in Hartford County

Flood gauges in Hartford County
Broad Brook7.08.78 ft, Oct 15, 20050
Burlington7.09.33 ft, Oct 15, 20052
Hartford16.037.60 ft, Mar 21, 19367
Simsbury12.030.10 ft, Aug 20, 19553
Tariffville9.014.00 ft, Sep 22, 19381
Unionville12.018.55 ft, Aug 28, 20110
East Hartford9.013.78 ft, Sep 21, 19381
Hartford8.018.80 ft, Aug 19, 19551
Southington8.510.49 ft, Jan 10, 20240

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

NOAA National Water Prediction Service, gauge TMVC3, 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.