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Connecticut River at West Lebanon

Highest listed crest 35.00 ftFlood stage 23.0 ft64 crests since 1912

The Connecticut River at West Lebanon crested at major flood stage 4 times among the 64 crests the National Weather Service lists from 1912 to 2023. The highest, 35.00 ft on November 4, 1927, was major flooding, 12.00 feet above flood stage. 2 other gauges on the Connecticut River crested above flood stage within a week of it.

The gauge

Highest listed crest
35.00 ft
November 4, 1927; 136,000 cubic feet per second
Flood stage
23.0 ft
Major flooding from 29.0 ft
Crests at major
4
3rd of 34 gauges in New Hampshire
Most recent flood crest
August 29, 2011
29.66 ft, major flooding
Location
Grafton County
Near Lebanon (3.0 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 West Lebanon
Action stage20.027Dec 19, 2023The level at which the NWS or its partners begin to take action
Flood stage (minor)23.011Apr 1, 1987Minimal or no property damage, but possibly some public threat
Moderate flood stage27.01Apr 12, 1922Some inundation of structures and roads near the stream
Major flood stage29.04Aug 29, 2011Extensive inundation of structures and roads

Every listed crest

64 crests from 1912 to 2023. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Connecticut River at West Lebanon, 1912 to 2023 1520253035ft Flood stage 23.0 ftMajor 29.0 ft Apr 8, 1912: 23.00 ft, minor flooding; 69,800 cubic feet per secondMar 27, 1913: 30.00 ft, major flooding; 113,000 cubic feet per secondApr 21, 1914: 22.80 ft, action stage; 68,800 cubic feet per secondApr 3, 1918: 18.50 ft, below flood stage; 48,400 cubic feet per secondMar 28, 1919: 20.80 ft, action stage; 59,200 cubic feet per secondApr 24, 1920: 18.50 ft, below flood stage; 48,400 cubic feet per secondApr 12, 1922: 27.00 ft, moderate flooding; 89,500 cubic feet per secondMay 1, 1923: 22.20 ft, action stage; 66,000 cubic feet per secondMar 29, 1925: 22.80 ft, action stage; 68,800 cubic feet per secondApr 25, 1926: 20.60 ft, action stage; 58,300 cubic feet per secondNov 4, 1927: 35.00 ft, major flooding; 136,000 cubic feet per secondApr 12, 1932: 20.60 ft, action stage; 51,900 cubic feet per secondApr 19, 1933: 24.20 ft, minor flooding; 68,700 cubic feet per secondApr 12, 1934: 21.80 ft, action stage; 57,200 cubic feet per secondMar 19, 1936: 32.60 ft, major flooding; 120,000 cubic feet per secondMay 15, 1937: 20.65 ft, action stage; 51,500 cubic feet per secondSep 22, 1938: 26.70 ft, minor flooding; 82,400 cubic feet per secondApr 26, 1939: 20.90 ft, action stage; 52,800 cubic feet per secondMay 5, 1940: 22.32 ft, action stage; 59,600 cubic feet per secondMar 22, 1945: 18.10 ft, below flood stage; 42,900 cubic feet per secondJun 3, 1947: 22.55 ft, action stage; 63,400 cubic feet per secondDec 31, 1948: 18.12 ft, below flood stage; 43,000 cubic feet per secondApr 22, 1950: 18.14 ft, below flood stage; 43,100 cubic feet per secondJun 2, 1952: 21.15 ft, action stage; 56,500 cubic feet per secondMar 27, 1953: 24.48 ft, minor flooding; 73,300 cubic feet per secondApr 24, 1954: 19.89 ft, below flood stage; 50,700 cubic feet per secondApr 16, 1955: 19.82 ft, below flood stage; 50,400 cubic feet per secondApr 25, 1958: 21.33 ft, action stage; 57,400 cubic feet per secondJan 22, 1959: 23.08 ft, minor floodingNov 28, 1959: 20.07 ft, action stage; 51,500 cubic feet per secondApr 5, 1960: 21.24 ft, action stage; 57,000 cubic feet per secondApr 8, 1962: 18.61 ft, below flood stage; 45,100 cubic feet per secondMar 6, 1964: 24.77 ft, minor flooding; 39,000 cubic feet per secondMar 24, 1968: 18.71 ft, below flood stage; 46,700 cubic feet per secondFeb 12, 1970: 23.33 ft, minor floodingApr 25, 1970: 18.79 ft, below flood stage; 47,100 cubic feet per secondMay 4, 1971: 18.34 ft, below flood stage; 45,300 cubic feet per secondMay 5, 1972: 21.70 ft, action stage; 62,000 cubic feet per secondJun 30, 1973: 25.30 ft, minor flooding; 79,100 cubic feet per secondDec 21, 1973: 19.35 ft, below flood stage; 51,300 cubic feet per secondApr 2, 1976: 23.50 ft, minor flooding; 70,400 cubic feet per secondMar 7, 1979: 22.47 ft, action stageMar 26, 1979: 18.82 ft, below flood stage; 49,000 cubic feet per secondFeb 12, 1981: 23.90 ft, minor floodingFeb 25, 1981: 18.50 ft, below flood stage; 47,600 cubic feet per secondApr 18, 1982: 20.62 ft, action stage; 57,000 cubic feet per secondMay 4, 1983: 18.04 ft, below flood stage; 45,600 cubic feet per secondMay 31, 1984: 22.59 ft, action stage; 66,100 cubic feet per secondMar 31, 1986: 19.81 ft, below flood stage; 50,500 cubic feet per secondApr 1, 1987: 23.06 ft, minor flooding; 68,400 cubic feet per secondMay 6, 1989: 18.34 ft, below flood stage; 46,900 cubic feet per secondJan 27, 1990: 21.56 ft, action stageApr 25, 1992: 18.19 ft, below flood stage; 46,300 cubic feet per secondApr 16, 1994: 20.97 ft, action stage; 58,600 cubic feet per secondApr 27, 1996: 19.13 ft, below flood stage; 50,300 cubic feet per secondApr 2, 1998: 21.86 ft, action stage; 59,900 cubic feet per secondApr 5, 2000: 18.46 ft, below flood stage; 47,400 cubic feet per secondApr 23, 2001: 20.95 ft, action stage; 59,100 cubic feet per secondApr 14, 2002: 22.16 ft, action stage; 65,000 cubic feet per secondOct 29, 2003: 18.74 ft, below flood stage; 48,900 cubic feet per secondAug 29, 2011: 29.66 ft, major flooding; 105,000 cubic feet per secondApr 15, 2019: 22.22 ft, action stage; 65,256 cubic feet per secondJul 11, 2023: 22.93 ft, action stage; 68,759 cubic feet per secondDec 19, 2023: 20.93 ft, action stage; 59,000 cubic feet per second Highest, 35.00 ft, Nov 4, 1927 192019401960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Connecticut River at West Lebanon 1910s: 2 1920s: 2 1930s: 3 3 1940s: 0 1950s: 2 1960s: 1 1970s: 3 1980s: 2 1990s: 0 2000s: 0 2010s: 1 2020s: 0 1910s1920s1930s1940s1950s1960s1970s1980s1990s2000s2010s2020s
  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 64 listed crests.

Highest listed crests, Connecticut River at West Lebanon
1Nov 4, 192735.00+12.00Major136,000
2Mar 19, 193632.60+9.60Major120,000
3Mar 27, 191330.00+7.00Major113,000
4Aug 29, 201129.66+6.66Major105,000
5Apr 12, 192227.00+4.00Moderate89,500
6Sep 22, 193826.70+3.70Minor82,400
7Jun 30, 197325.30+2.30Minor79,100
8Mar 6, 196424.77+1.77Minor39,000
9Mar 27, 195324.48+1.48Minor73,300
10Apr 19, 193324.20+1.20Minor68,700
11Feb 12, 198123.90+0.90Minor—
12Apr 2, 197623.50+0.50Minor70,400
13Feb 12, 197023.33+0.33Minor—
14Jan 22, 195923.08+0.08Minor—
15Apr 1, 198723.06+0.06Minor68,400
16Apr 8, 191223.000.00Minor69,800
17Jul 11, 202322.93−0.07Action68,759
18Apr 21, 191422.80−0.20Action68,800
19Mar 29, 192522.80−0.20Action68,800
20May 31, 198422.59−0.41Action66,100
21Jun 3, 194722.55−0.45Action63,400
22Mar 7, 197922.47−0.53Action—
23May 5, 194022.32−0.68Action59,600
24Apr 15, 201922.22−0.78Action65,256
25May 1, 192322.20−0.80Action66,000
26Apr 14, 200222.16−0.84Action65,000
27Apr 2, 199821.86−1.14Action59,900
28Apr 12, 193421.80−1.20Action57,200
29May 5, 197221.70−1.30Action62,000
30Jan 27, 199021.56−1.44Action—
31Apr 25, 195821.33−1.67Action57,400
32Apr 5, 196021.24−1.76Action57,000
33Jun 2, 195221.15−1.85Action56,500
34Apr 16, 199420.97−2.03Action58,600
35Apr 23, 200120.95−2.05Action59,100
36Dec 19, 202320.93−2.07Action59,000
37Apr 26, 193920.90−2.10Action52,800
38Mar 28, 191920.80−2.20Action59,200
39May 15, 193720.65−2.35Action51,500
40Apr 18, 198220.62−2.38Action57,000
41Apr 25, 192620.60−2.40Action58,300
42Apr 12, 193220.60−2.40Action51,900
43Nov 28, 195920.07−2.93Action51,500
44Apr 24, 195419.89−3.11Below flood stage50,700
45Apr 16, 195519.82−3.18Below flood stage50,400
46Mar 31, 198619.81−3.19Below flood stage50,500
47Dec 21, 197319.35−3.65Below flood stage51,300
48Apr 27, 199619.13−3.87Below flood stage50,300
49Mar 26, 197918.82−4.18Below flood stage49,000
50Apr 25, 197018.79−4.21Below flood stage47,100

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.

November 4, 1927: 35.00 ft here, major flooding

March 19, 1936: 32.60 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
  • SpringfieldMA · Mar 20, 1936 · 28.60 ft · Major · its highest
  • ThompsonvilleCT · Mar 20, 1936 · 26.60 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

March 27, 1913: 30.00 ft here, major flooding

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
ThompsonvilleCT15.026.60 ft, Mar 20, 19367
Wells RiverVT12.017.35 ft, Jul 1, 19731
West Lebanon this gaugeNH23.035.00 ft, Nov 4, 19274

Other gauges in Grafton County

Flood gauges in Grafton County
Bethlehem8.012.34 ft, Nov 12, 19950
Rumney10.017.40 ft, Nov 3, 19272
Groton9.511.82 ft, Oct 30, 20170
Plymouth13.029.00 ft, Mar 19, 19368
Woodstock9.016.97 ft, Aug 28, 20112

Grafton County: every hazard · River floods across the country · New Hampshire

NOAA National Water Prediction Service, gauge WLBN3, 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.