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Susquehanna River at Unadilla

Highest listed crest 17.72 ftFlood stage 11.0 ft58 crests since 1935

The Susquehanna River at Unadilla crested at major flood stage 5 times among the 58 crests the National Weather Service lists from 1935 to 2023. The highest, 17.72 ft on June 29, 2006, was major flooding, 6.72 feet above flood stage. 17 other gauges on the Susquehanna River crested above flood stage within a week of it, 4 at their own highest listed crest.

The gauge

Highest listed crest
17.72 ft
June 29, 2006; 35,100 cubic feet per second
Flood stage
11.0 ft
Major flooding from 14.5 ft
Crests at major
5
31st of 160 gauges in New York
Most recent flood crest
December 19, 2023
11.57 ft, minor flooding
Location
Otsego County
New York

Flood stages

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

Flood categories, Susquehanna River at Unadilla
Action stage9.00—The level at which the NWS or its partners begin to take action
Flood stage (minor)11.039Dec 19, 2023Minimal or no property damage, but possibly some public threat
Moderate flood stage13.014Apr 3, 2005Some inundation of structures and roads near the stream
Major flood stage14.55Sep 9, 2011Extensive inundation of structures and roads

Every listed crest

58 crests from 1935 to 2023. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Susquehanna River at Unadilla, 1935 to 2023 1012141618ft Flood stage 11.0 ftMajor 14.5 ft Jul 8, 1935: 16.00 ft, major flooding; 29,000 cubic feet per secondMar 18, 1936: 16.60 ft, major flooding; 31,300 cubic feet per secondSep 22, 1938: 13.76 ft, moderate flooding; 21,000 cubic feet per secondFeb 21, 1939: 11.90 ft, minor flooding; 15,600 cubic feet per secondMar 31, 1940: 13.54 ft, moderate flooding; 20,300 cubic feet per secondMar 18, 1942: 12.09 ft, minor flooding; 16,100 cubic feet per secondDec 30, 1942: 13.94 ft, moderate flooding; 21,500 cubic feet per secondMay 18, 1943: 11.86 ft, minor flooding; 15,500 cubic feet per secondMar 18, 1944: 11.48 ft, minor flooding; 14,400 cubic feet per secondMar 8, 1946: 11.18 ft, minor flooding; 13,700 cubic feet per secondMay 27, 1946: 11.08 ft, minor flooding; 13,400 cubic feet per secondApr 6, 1947: 11.15 ft, minor flooding; 13,600 cubic feet per secondMar 17, 1948: 11.21 ft, minor flooding; 13,700 cubic feet per secondMar 22, 1948: 13.18 ft, moderate flooding; 13,000 cubic feet per secondDec 31, 1948: 11.49 ft, minor flooding; 14,500 cubic feet per secondMar 29, 1950: 11.46 ft, minor flooding; 14,400 cubic feet per secondSep 2, 1950: 11.77 ft, minor flooding; 12,500 cubic feet per secondMar 9, 1956: 11.06 ft, minor flooding; 12,600 cubic feet per secondApr 6, 1956: 12.38 ft, minor flooding; 16,000 cubic feet per secondApr 17, 1956: 11.32 ft, minor flooding; 13,300 cubic feet per secondApr 7, 1958: 11.71 ft, minor flooding; 14,200 cubic feet per secondJan 22, 1959: 13.42 ft, moderate flooding; 17,000 cubic feet per secondNov 29, 1959: 11.79 ft, minor flooding; 14,400 cubic feet per secondApr 4, 1960: 14.25 ft, moderate flooding; 21,200 cubic feet per secondFeb 26, 1961: 11.66 ft, minor flooding; 14,100 cubic feet per secondApr 2, 1962: 12.83 ft, minor flooding; 17,200 cubic feet per secondMar 27, 1963: 12.62 ft, minor flooding; 16,600 cubic feet per secondMar 6, 1964: 13.17 ft, moderate flooding; 18,200 cubic feet per secondMar 14, 1977: 14.64 ft, major flooding; 23,000 cubic feet per secondMar 31, 1977: 11.18 ft, minor flooding; 13,700 cubic feet per secondSep 21, 1977: 11.82 ft, minor flooding; 15,200 cubic feet per secondOct 18, 1977: 14.13 ft, moderate flooding; 21,900 cubic feet per secondMar 6, 1979: 13.90 ft, moderate flooding; 21,200 cubic feet per secondMar 26, 1979: 12.62 ft, minor flooding; 16,300 cubic feet per secondMar 22, 1980: 11.34 ft, minor flooding; 13,900 cubic feet per secondApr 26, 1983: 11.23 ft, minor flooding; 13,600 cubic feet per secondMay 3, 1983: 11.15 ft, minor flooding; 13,400 cubic feet per secondMar 16, 1986: 13.18 ft, moderate flooding; 13,000 cubic feet per secondApr 5, 1987: 11.47 ft, minor flooding; 14,300 cubic feet per secondMar 31, 1993: 13.49 ft, moderate flooding; 19,900 cubic feet per secondApr 11, 1993: 11.47 ft, minor flooding; 14,300 cubic feet per secondJan 19, 1996: 14.24 ft, moderate flooding; 17,100 cubic feet per secondNov 10, 1996: 11.68 ft, minor flooding; 14,800 cubic feet per secondJan 10, 1998: 13.60 ft, moderate flooding; 20,300 cubic feet per secondJan 25, 1999: 11.40 ft, minor flooding; 14,100 cubic feet per secondFeb 28, 2000: 12.73 ft, minor flooding; 17,700 cubic feet per secondApr 10, 2001: 11.57 ft, minor flooding; 14,800 cubic feet per secondMar 22, 2003: 11.47 ft, minor flooding; 14,300 cubic feet per secondApr 3, 2005: 13.68 ft, moderate flooding; 20,500 cubic feet per secondJun 29, 2006: 17.72 ft, major flooding; 35,100 cubic feet per secondMar 9, 2008: 11.61 ft, minor flooding; 14,700 cubic feet per secondMar 24, 2010: 11.29 ft, minor flooding; 13,900 cubic feet per secondOct 2, 2010: 11.07 ft, minor flooding; 13,300 cubic feet per secondApr 29, 2011: 11.34 ft, minor flooding; 14,000 cubic feet per secondSep 9, 2011: 16.34 ft, major flooding; 29,700 cubic feet per secondApr 7, 2017: 11.57 ft, minor flooding; 14,685 cubic feet per secondApr 9, 2022: 12.35 ft, minor flooding; 16,540 cubic feet per secondDec 19, 2023: 11.57 ft, minor flooding; 14,612 cubic feet per second Highest, 17.72 ft, Jun 29, 2006 19401960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Susquehanna River at Unadilla 1930s: 4 1940s: 11 11 1950s: 8 1960s: 5 1970s: 6 1980s: 5 1990s: 6 2000s: 6 2010s: 5 2020s: 2 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 58 listed crests.

Highest listed crests, Susquehanna River at Unadilla
1Jun 29, 200617.72+6.72Major35,100
2Mar 18, 193616.60+5.60Major31,300
3Sep 9, 201116.34+5.34Major29,700
4Jul 8, 193516.00+5.00Major29,000
5Mar 14, 197714.64+3.64Major23,000
6Apr 4, 196014.25+3.25Moderate21,200
7Jan 19, 199614.24+3.24Moderate17,100
8Oct 18, 197714.13+3.13Moderate21,900
9Dec 30, 194213.94+2.94Moderate21,500
10Mar 6, 197913.90+2.90Moderate21,200
11Sep 22, 193813.76+2.76Moderate21,000
12Apr 3, 200513.68+2.68Moderate20,500
13Jan 10, 199813.60+2.60Moderate20,300
14Mar 31, 194013.54+2.54Moderate20,300
15Mar 31, 199313.49+2.49Moderate19,900
16Jan 22, 195913.42+2.42Moderate17,000
17Mar 22, 194813.18+2.18Moderate13,000
18Mar 16, 198613.18+2.18Moderate13,000
19Mar 6, 196413.17+2.17Moderate18,200
20Apr 2, 196212.83+1.83Minor17,200
21Feb 28, 200012.73+1.73Minor17,700
22Mar 27, 196312.62+1.62Minor16,600
23Mar 26, 197912.62+1.62Minor16,300
24Apr 6, 195612.38+1.38Minor16,000
25Apr 9, 202212.35+1.35Minor16,540
26Mar 18, 194212.09+1.09Minor16,100
27Feb 21, 193911.90+0.90Minor15,600
28May 18, 194311.86+0.86Minor15,500
29Sep 21, 197711.82+0.82Minor15,200
30Nov 29, 195911.79+0.79Minor14,400
31Sep 2, 195011.77+0.77Minor12,500
32Apr 7, 195811.71+0.71Minor14,200
33Nov 10, 199611.68+0.68Minor14,800
34Feb 26, 196111.66+0.66Minor14,100
35Mar 9, 200811.61+0.61Minor14,700
36Apr 10, 200111.57+0.57Minor14,800
37Apr 7, 201711.57+0.57Minor14,685
38Dec 19, 202311.57+0.57Minor14,612
39Dec 31, 194811.49+0.49Minor14,500
40Mar 18, 194411.48+0.48Minor14,400
41Apr 5, 198711.47+0.47Minor14,300
42Apr 11, 199311.47+0.47Minor14,300
43Mar 22, 200311.47+0.47Minor14,300
44Mar 29, 195011.46+0.46Minor14,400
45Jan 25, 199911.40+0.40Minor14,100
46Mar 22, 198011.34+0.34Minor13,900
47Apr 29, 201111.34+0.34Minor14,000
48Apr 17, 195611.32+0.32Minor13,300
49Mar 24, 201011.29+0.29Minor13,900
50Apr 26, 198311.23+0.23Minor13,600

The worst floods along the Susquehanna River

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

June 29, 2006: 17.72 ft here, major flooding

  • SidneyNY · Jun 28, 2006 · 988.30 ft · Major · its highest
  • OwegoNY · Jun 29, 2006 · 35.90 ft · Major
  • Wilkes BarrePA · Jun 28, 2006 · 34.14 ft · Major
  • VestalNY · Jun 28, 2006 · 33.66 ft · Major
  • BloomsburgPA · Jun 28, 2006 · 28.64 ft · Major
  • BainbridgeNY · Jun 29, 2006 · 27.05 ft · Major · its highest
  • ConklinNY · Jun 28, 2006 · 25.02 ft · Major · its highest
  • BinghamtonNY · Jun 28, 2006 · 25.00 ft · Major
  • WindsorNY · Jun 29, 2006 · 24.27 ft · Major · its highest
  • WaverlyPA · Jun 29, 2006 · 22.52 ft · Major

March 18, 1936: 16.60 ft here, major flooding

  • MariettaPA · Mar 19, 1936 · 60.73 ft · Major
  • Wilkes BarrePA · Mar 20, 1936 · 33.07 ft · Major
  • VestalNY · Mar 18, 1936 · 30.50 ft · Major
  • HarrisburgPA · Mar 19, 1936 · 29.23 ft · Major
  • BinghamtonNY · Mar 18, 1936 · 22.90 ft · Major
  • WaverlyPA · Mar 18, 1936 · 21.40 ft · Major
  • DanvillePA · Mar 19, 1936 · 28.01 ft · Moderate
  • BloomsburgPA · Mar 19, 1936 · 27.80 ft · Moderate
  • SunburyPA · Mar 19, 1936 · 26.85 ft · Moderate
  • TowandaPA · Mar 19, 1936 · 25.03 ft · Moderate

September 9, 2011: 16.34 ft here, major flooding

  • SidneyNY · Sep 9, 2011 · 987.36 ft · Major
  • MariettaPA · Sep 9, 2011 · 58.16 ft · Major
  • MeshoppenPA · Sep 8, 2011 · 44.48 ft · Major · its highest
  • Wilkes BarrePA · Sep 9, 2011 · 42.66 ft · Major · its highest
  • OwegoNY · Sep 8, 2011 · 39.62 ft · Major · its highest
  • VestalNY · Sep 8, 2011 · 35.26 ft · Major · its highest
  • BloomsburgPA · Sep 9, 2011 · 32.75 ft · Major · its highest
  • Conowingo DamMD · Sep 9, 2011 · 32.41 ft · Major
  • DanvillePA · Sep 9, 2011 · 31.55 ft · Major
  • TowandaPA · Sep 8, 2011 · 30.52 ft · Major

Gauges on the Susquehanna River

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

Flood gauges on the Susquehanna River
BainbridgeNY15.027.05 ft, Jun 29, 20062
BinghamtonNY14.025.73 ft, Sep 8, 201112
BloomsburgPA19.032.75 ft, Sep 9, 20115
ConklinNY12.025.02 ft, Jun 28, 20062
Conowingo DamMD23.536.83 ft, Jun 24, 19725
DanvillePA20.032.32 ft, Jun 24, 19723
HarrisburgPA17.033.27 ft, Jun 24, 19728
MariettaPA49.064.54 ft, Jun 23, 19729
MeshoppenPA27.044.48 ft, Sep 8, 20112
OwegoNY30.039.62 ft, Sep 8, 20113
SidneyNY979.5988.30 ft, Jun 28, 20062
SunburyPA24.035.80 ft, Jun 24, 19721
TowandaPA16.033.43 ft, Jun 24, 19723
Unadilla this gaugeNY11.017.72 ft, Jun 29, 20065
VestalNY18.035.26 ft, Sep 8, 20118
Wilkes BarrePA22.042.66 ft, Sep 9, 201115
WindsorNY17.024.27 ft, Jun 29, 20063
WaverlyPA13.026.67 ft, Sep 8, 20117

Otsego County: every hazard · River floods across the country · New York

NOAA National Water Prediction Service, gauge UNDN6, 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.