Search
Menu

Explore

Hazards

Analysis

Rankings

Reference

Connecticut River at Dalton

Highest listed crest 25.60 ftFlood stage 18.0 ft57 crests since 1936

The Connecticut River at Dalton crested at major flood stage 3 times among the 57 crests the National Weather Service lists from 1936 to 2024. The highest, 25.60 ft on March 20, 1936, was major flooding, 7.60 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
25.60 ft
March 20, 1936; 48,300 cubic feet per second
Flood stage
18.0 ft
Major flooding from 23.0 ft
Crests at major
3
6th of 34 gauges in New Hampshire
Most recent flood crest
April 17, 2014
22.15 ft, moderate flooding
Location
Coos County
New Hampshire

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 Dalton
Action stage15.016Jul 13, 2024The level at which the NWS or its partners begin to take action
Flood stage (minor)18.029May 26, 2013Minimal or no property damage, but possibly some public threat
Moderate flood stage21.09Apr 17, 2014Some inundation of structures and roads near the stream
Major flood stage23.03Apr 1, 1998Extensive inundation of structures and roads

Every listed crest

57 crests from 1936 to 2024. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Connecticut River at Dalton, 1936 to 2024 161820222426ft Flood stage 18.0 ftMajor 23.0 ft Mar 20, 1936: 25.60 ft, major flooding; 48,300 cubic feet per secondMay 1, 1937: 17.30 ft, action stage; 19,600 cubic feet per secondSep 22, 1938: 17.53 ft, action stage; 19,600 cubic feet per secondApr 23, 1939: 18.82 ft, minor flooding; 23,600 cubic feet per secondMay 4, 1940: 21.10 ft, moderate flooding; 31,300 cubic feet per secondApr 17, 1941: 17.45 ft, action stage; 19,300 cubic feet per secondApr 27, 1942: 18.64 ft, minor flooding; 23,100 cubic feet per secondJun 18, 1943: 18.05 ft, minor flooding; 21,400 cubic feet per secondMay 7, 1944: 17.96 ft, action stage; 20,400 cubic feet per secondMar 31, 1945: 19.79 ft, minor flooding; 24,900 cubic feet per secondJun 4, 1947: 18.45 ft, minor flooding; 21,800 cubic feet per secondApr 22, 1950: 18.27 ft, minor flooding; 21,300 cubic feet per secondNov 26, 1950: 17.24 ft, action stage; 18,400 cubic feet per secondApr 22, 1952: 17.22 ft, action stage; 18,300 cubic feet per secondMar 28, 1953: 22.38 ft, moderate flooding; 34,600 cubic feet per secondApr 24, 1954: 22.25 ft, moderate flooding; 34,100 cubic feet per secondApr 17, 1955: 20.19 ft, minor flooding; 27,100 cubic feet per secondMay 1, 1956: 17.11 ft, action stage; 18,000 cubic feet per secondApr 23, 1958: 20.63 ft, minor flooding; 28,600 cubic feet per secondApr 20, 1960: 20.26 ft, minor flooding; 27,400 cubic feet per secondApr 25, 1961: 17.21 ft, action stage; 18,300 cubic feet per secondApr 10, 1962: 18.08 ft, minor flooding; 20,700 cubic feet per secondApr 23, 1963: 18.21 ft, minor flooding; 21,100 cubic feet per secondApr 16, 1964: 19.31 ft, minor flooding; 24,400 cubic feet per secondApr 19, 1969: 20.58 ft, minor flooding; 29,400 cubic feet per secondApr 27, 1970: 19.02 ft, minor flooding; 24,000 cubic feet per secondMay 6, 1972: 21.34 ft, moderate flooding; 32,200 cubic feet per secondJul 2, 1973: 18.04 ft, minor flooding; 20,800 cubic feet per secondApr 25, 1974: 19.78 ft, minor flooding; 26,600 cubic feet per secondApr 1, 1976: 18.59 ft, minor flooding; 22,600 cubic feet per secondMay 11, 1978: 17.35 ft, action stage; 18,800 cubic feet per secondMar 27, 1979: 17.67 ft, action stage; 19,700 cubic feet per secondFeb 24, 1981: 18.00 ft, minor flooding; 20,700 cubic feet per secondJun 1, 1984: 20.30 ft, minor flooding; 28,400 cubic feet per secondApr 2, 1987: 20.54 ft, minor flooding; 29,200 cubic feet per secondApr 7, 1989: 20.16 ft, minor flooding; 27,900 cubic feet per secondMar 19, 1990: 23.22 ft, major flooding; 38,700 cubic feet per secondApr 11, 1991: 18.30 ft, minor flooding; 21,600 cubic feet per secondApr 24, 1992: 19.79 ft, minor flooding; 26,600 cubic feet per secondApr 18, 1994: 20.06 ft, minor flooding; 27,500 cubic feet per secondJan 17, 1995: 20.73 ft, minor flooding; 29,900 cubic feet per secondApr 25, 1996: 20.86 ft, minor flooding; 30,400 cubic feet per secondApr 1, 1998: 23.70 ft, major flooding; 41,000 cubic feet per secondMay 12, 2000: 19.09 ft, minor flooding; 24,100 cubic feet per secondApr 25, 2001: 21.38 ft, moderate flooding; 32,300 cubic feet per secondApr 16, 2002: 21.40 ft, moderate flooding; 32,400 cubic feet per secondMar 31, 2003: 17.17 ft, action stage; 19,900 cubic feet per secondApr 6, 2005: 17.14 ft, action stage; 18,100 cubic feet per secondOct 18, 2005: 21.10 ft, moderate flooding; 31,300 cubic feet per secondApr 25, 2007: 18.35 ft, minor flooding; 21,800 cubic feet per secondApr 21, 2008: 17.65 ft, action stage; 19,600 cubic feet per secondApr 29, 2011: 22.07 ft, moderate flooding; 33,200 cubic feet per secondMay 26, 2013: 18.18 ft, minor flooding; 21,200 cubic feet per secondApr 17, 2014: 22.15 ft, moderate flooding; 35,400 cubic feet per secondDec 20, 2023: 17.31 ft, action stage; 19,455 cubic feet per secondMar 8, 2024: 17.86 ft, action stage; 21,197 cubic feet per secondJul 13, 2024: 17.76 ft, action stage; 20,874 cubic feet per second Highest, 25.60 ft, Mar 20, 1936 19401960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Connecticut River at Dalton 1930s: 2 1940s: 5 1950s: 5 1960s: 5 1970s: 5 1980s: 4 1990s: 7 7 2000s: 5 2010s: 3 2020s: 0 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 57 listed crests.

Highest listed crests, Connecticut River at Dalton
1Mar 20, 193625.60+7.60Major48,300
2Apr 1, 199823.70+5.70Major41,000
3Mar 19, 199023.22+5.22Major38,700
4Mar 28, 195322.38+4.38Moderate34,600
5Apr 24, 195422.25+4.25Moderate34,100
6Apr 17, 201422.15+4.15Moderate35,400
7Apr 29, 201122.07+4.07Moderate33,200
8Apr 16, 200221.40+3.40Moderate32,400
9Apr 25, 200121.38+3.38Moderate32,300
10May 6, 197221.34+3.34Moderate32,200
11May 4, 194021.10+3.10Moderate31,300
12Oct 18, 200521.10+3.10Moderate31,300
13Apr 25, 199620.86+2.86Minor30,400
14Jan 17, 199520.73+2.73Minor29,900
15Apr 23, 195820.63+2.63Minor28,600
16Apr 19, 196920.58+2.58Minor29,400
17Apr 2, 198720.54+2.54Minor29,200
18Jun 1, 198420.30+2.30Minor28,400
19Apr 20, 196020.26+2.26Minor27,400
20Apr 17, 195520.19+2.19Minor27,100
21Apr 7, 198920.16+2.16Minor27,900
22Apr 18, 199420.06+2.06Minor27,500
23Mar 31, 194519.79+1.79Minor24,900
24Apr 24, 199219.79+1.79Minor26,600
25Apr 25, 197419.78+1.78Minor26,600
26Apr 16, 196419.31+1.31Minor24,400
27May 12, 200019.09+1.09Minor24,100
28Apr 27, 197019.02+1.02Minor24,000
29Apr 23, 193918.82+0.82Minor23,600
30Apr 27, 194218.64+0.64Minor23,100
31Apr 1, 197618.59+0.59Minor22,600
32Jun 4, 194718.45+0.45Minor21,800
33Apr 25, 200718.35+0.35Minor21,800
34Apr 11, 199118.30+0.30Minor21,600
35Apr 22, 195018.27+0.27Minor21,300
36Apr 23, 196318.21+0.21Minor21,100
37May 26, 201318.18+0.18Minor21,200
38Apr 10, 196218.08+0.08Minor20,700
39Jun 18, 194318.05+0.05Minor21,400
40Jul 2, 197318.04+0.04Minor20,800
41Feb 24, 198118.000.00Minor20,700
42May 7, 194417.96−0.04Action20,400
43Mar 8, 202417.86−0.14Action21,197
44Jul 13, 202417.76−0.24Action20,874
45Mar 27, 197917.67−0.33Action19,700
46Apr 21, 200817.65−0.35Action19,600
47Sep 22, 193817.53−0.47Action19,600
48Apr 17, 194117.45−0.55Action19,300
49May 11, 197817.35−0.65Action18,800
50Dec 20, 202317.31−0.69Action19,455

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: 25.60 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
  • ThompsonvilleCT · Mar 20, 1936 · 26.60 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

April 1, 1998: 23.70 ft here, major flooding

March 19, 1990: 23.22 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
Dalton this gaugeNH18.025.60 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 LebanonNH23.035.00 ft, Nov 4, 19274

Other gauges in Coos County

Flood gauges in Coos County
Gorham8.010.30 ft, Apr 30, 19230
North Stratford13.016.66 ft, Mar 13, 19360
Groveton7.512.01 ft, May 20, 19691

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

NOAA National Water Prediction Service, gauge DLTN3, 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.