Highest listed crest 18.51 ft August 29, 2011; 33,500 cubic feet per second
Flood stage 7.0 ft Major flooding from 11.0 ft
Crests at major 15 3rd of 160 gauges in New York
Most recent flood crest March 17, 2025 7.58 ft, minor flooding Listed crests at the East Branch of the Ausable River at Au Sable Forks, 1924 to 2025 5 10 15 20 ft Flood stage 7.0 ft Major 11.0 ft Oct 1, 1924: 10.85 ft, moderate flooding; 1,180 cubic feet per second Mar 28, 1925: 11.40 ft, major flooding Mar 18, 1936: 9.60 ft, moderate flooding; 10,800 cubic feet per second Sep 22, 1938: 12.91 ft, major flooding; 20,100 cubic feet per second Mar 27, 1939: 9.24 ft, moderate flooding; 10,600 cubic feet per second Sep 27, 1942: 8.07 ft, minor flooding; 7,900 cubic feet per second Jun 24, 1944: 8.75 ft, minor flooding; 9,420 cubic feet per second May 18, 1945: 7.81 ft, minor flooding; 6,950 cubic feet per second Jul 15, 1945: 7.63 ft, minor flooding; 6,580 cubic feet per second Apr 12, 1947: 7.51 ft, minor flooding; 6,340 cubic feet per second May 22, 1947: 7.79 ft, minor flooding; 6,910 cubic feet per second Jun 3, 1947: 8.11 ft, minor flooding; 7,590 cubic feet per second Jul 8, 1947: 7.05 ft, minor flooding; 5,460 cubic feet per second Dec 31, 1948: 11.60 ft, major flooding; 16,500 cubic feet per second Apr 20, 1950: 7.03 ft, minor flooding; 5,420 cubic feet per second Nov 26, 1950: 7.09 ft, minor flooding; 5,530 cubic feet per second Mar 31, 1951: 8.19 ft, minor flooding; 7,770 cubic feet per second Apr 6, 1952: 7.28 ft, minor flooding; 5,890 cubic feet per second Dec 11, 1952: 7.62 ft, minor flooding; 6,560 cubic feet per second Mar 27, 1953: 8.05 ft, minor flooding; 7,460 cubic feet per second Apr 17, 1954: 7.92 ft, minor flooding; 7,180 cubic feet per second Apr 5, 1956: 7.48 ft, minor flooding; 6,280 cubic feet per second Apr 30, 1956: 7.12 ft, minor flooding; 5,590 cubic feet per second Dec 21, 1957: 9.60 ft, moderate flooding; 11,100 cubic feet per second Apr 22, 1958: 8.22 ft, minor flooding; 7,830 cubic feet per second Oct 24, 1959: 8.03 ft, minor flooding; 7,420 cubic feet per second Feb 11, 1960: 7.58 ft, minor flooding; 6,480 cubic feet per second Apr 4, 1963: 7.06 ft, minor flooding; 5,480 cubic feet per second Mar 5, 1964: 8.22 ft, minor flooding; 5,000 cubic feet per second Apr 3, 1967: 7.04 ft, minor flooding; 5,440 cubic feet per second Mar 23, 1968: 7.11 ft, minor flooding; 5,570 cubic feet per second Apr 25, 1968: 7.79 ft, minor flooding; 6,910 cubic feet per second Nov 8, 1969: 7.92 ft, minor flooding; 7,180 cubic feet per second May 3, 1972: 7.49 ft, minor flooding; 6,300 cubic feet per second Jun 24, 1972: 7.14 ft, minor flooding; 5,630 cubic feet per second May 22, 1973: 7.01 ft, minor flooding; 5,390 cubic feet per second Apr 1, 1976: 7.17 ft, minor flooding; 5,730 cubic feet per second Mar 13, 1977: 7.85 ft, minor flooding; 7,030 cubic feet per second Apr 24, 1977: 7.41 ft, minor flooding; 6,150 cubic feet per second Oct 17, 1977: 8.76 ft, minor flooding; 9,060 cubic feet per second Jan 9, 1978: 8.84 ft, minor flooding; 1,300 cubic feet per second Mar 6, 1979: 7.65 ft, minor flooding Mar 25, 1979: 7.31 ft, minor flooding; 5,960 cubic feet per second Apr 28, 1979: 9.35 ft, moderate flooding; 10,500 cubic feet per second Sep 6, 1979: 7.76 ft, minor flooding; 6,840 cubic feet per second Nov 27, 1979: 11.13 ft, major flooding; 15,200 cubic feet per second Mar 21, 1980: 7.63 ft, minor flooding Apr 10, 1980: 7.09 ft, minor flooding; 5,550 cubic feet per second Feb 11, 1981: 11.70 ft, major flooding Feb 21, 1981: 7.98 ft, minor flooding Sep 23, 1981: 6.48 ft, action stage; 4,590 cubic feet per second Oct 28, 1981: 7.24 ft, minor flooding; 5,860 cubic feet per second Apr 18, 1982: 8.34 ft, minor flooding; 7,990 cubic feet per second Feb 3, 1983: 11.63 ft, major flooding; 1,200 cubic feet per second May 1, 1983: 9.12 ft, moderate flooding; 9,720 cubic feet per second Dec 14, 1983: 7.22 ft, minor flooding; 5,820 cubic feet per second Apr 16, 1984: 6.53 ft, action stage; 4,670 cubic feet per second Dec 29, 1984: 8.15 ft, minor flooding; 7,600 cubic feet per second May 18, 1985: 5.89 ft, below flood stage; 3,720 cubic feet per second Sep 27, 1985: 7.16 ft, minor flooding; 5,720 cubic feet per second Mar 15, 1986: 8.21 ft, minor flooding Mar 19, 1986: 6.56 ft, action stage; 4,720 cubic feet per second Mar 31, 1987: 9.57 ft, moderate flooding; 10,800 cubic feet per second Apr 7, 1987: 6.23 ft, action stage; 4,210 cubic feet per second Apr 29, 1988: 7.48 ft, minor flooding; 6,290 cubic feet per second Nov 6, 1988: 8.71 ft, minor flooding; 8,790 cubic feet per second Mar 29, 1989: 7.17 ft, minor flooding; 5,730 cubic feet per second Sep 20, 1989: 8.22 ft, minor flooding; 7,740 cubic feet per second Oct 21, 1989: 7.51 ft, minor flooding; 6,350 cubic feet per second Feb 23, 1990: 13.96 ft, major flooding; 1,500 cubic feet per second Oct 24, 1990: 6.88 ft, action stage; 5,240 cubic feet per second Mar 11, 1992: 10.50 ft, moderate flooding; 9,510 cubic feet per second Mar 27, 1992: 7.11 ft, minor flooding; 5,630 cubic feet per second Apr 17, 1993: 7.94 ft, minor flooding; 7,170 cubic feet per second Apr 16, 1994: 7.01 ft, minor flooding; 5,460 cubic feet per second Jan 15, 1995: 6.27 ft, action stage Jan 19, 1996: 11.93 ft, major flooding; 14,000 cubic feet per second Nov 9, 1996: 15.22 ft, major flooding; 23,900 cubic feet per second Dec 9, 1996: 7.01 ft, minor flooding; 5,420 cubic feet per second Jan 8, 1998: 8.52 ft, minor flooding; 8,180 cubic feet per second Jan 24, 1999: 9.71 ft, moderate flooding Sep 17, 1999: 6.64 ft, action stage; 4,850 cubic feet per second Mar 28, 2000: 7.34 ft, minor flooding; 6,040 cubic feet per second Apr 22, 2001: 7.86 ft, minor flooding; 6,960 cubic feet per second Apr 14, 2002: 7.59 ft, minor flooding; 6,480 cubic feet per second Mar 29, 2003: 5.47 ft, below flood stage; 3,170 cubic feet per second Dec 25, 2003: 7.70 ft, minor flooding Jan 14, 2005: 7.06 ft, minor flooding; 5,546 cubic feet per second Apr 3, 2005: 7.47 ft, minor flooding; 6,272 cubic feet per second Apr 24, 2005: 9.54 ft, moderate flooding; 10,217 cubic feet per second Jun 17, 2005: 7.90 ft, minor flooding; 7,033 cubic feet per second Mar 23, 2010: 7.30 ft, minor flooding; 8,978 cubic feet per second Oct 1, 2010: 7.21 ft, minor flooding; 8,732 cubic feet per second Apr 12, 2011: 8.40 ft, minor flooding; 7,951 cubic feet per second Apr 28, 2011: 11.48 ft, major flooding; 14,452 cubic feet per second Aug 29, 2011: 18.51 ft, major flooding; 33,500 cubic feet per second Jun 28, 2013: 9.65 ft, moderate flooding; 10,959 cubic feet per second Dec 22, 2013: 9.61 ft, moderate flooding; 10,863 cubic feet per second Apr 16, 2014: 9.37 ft, moderate flooding; 10,340 cubic feet per second May 17, 2014: 8.90 ft, minor flooding; 9,307 cubic feet per second Jan 12, 2018: 13.27 ft, major flooding; 19,394 cubic feet per second Apr 26, 2018: 7.80 ft, minor flooding; 7,061 cubic feet per second Dec 22, 2018: 7.45 ft, minor flooding; 6,418 cubic feet per second Apr 20, 2019: 8.27 ft, minor flooding; 7,974 cubic feet per second Nov 1, 2019: 11.27 ft, major flooding; 14,757 cubic feet per second Jan 12, 2020: 7.82 ft, minor flooding; 7,099 cubic feet per second Apr 14, 2020: 7.63 ft, minor flooding; 6,746 cubic feet per second Aug 5, 2020: 7.61 ft, minor flooding; 6,709 cubic feet per second Dec 25, 2020: 8.73 ft, minor flooding; 8,924 cubic feet per second Feb 18, 2022: 15.82 ft, major flooding Apr 8, 2022: 7.03 ft, minor flooding; 5,688 cubic feet per second May 1, 2023: 8.36 ft, minor flooding; 8,157 cubic feet per second Oct 8, 2023: 8.85 ft, minor flooding; 9,182 cubic feet per second Dec 18, 2023: 11.83 ft, major flooding; 16,058 cubic feet per second Apr 13, 2024: 7.71 ft, minor flooding; 6,893 cubic feet per second Jul 11, 2024: 8.50 ft, minor flooding; 8,440 cubic feet per second Mar 17, 2025: 7.58 ft, minor flooding; 6,654 cubic feet per second Highest, 18.51 ft, Aug 29, 2011 1940 1960 1980 2000 2020 Crests at or above flood stage, by decade Crests at or above flood stage per decade, East Branch of the Ausable River at Au Sable Forks 1920s: 2 1930s: 3 1940s: 9 1950s: 12 1960s: 7 1970s: 13 1980s: 18 18 1990s: 10 2000s: 8 2010s: 14 2020s: 12 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s 2020s 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. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable. 05 Other gauges in Essex County Essex County: every hazard · River floods across the country · New York
NOAA National Water Prediction Service, gauge ASFN6, 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.