Highest listed crest 27.21 ft May 13, 1982; 47,200 cubic feet per second
Flood stage 16.0 ft Major flooding from 25.0 ft
Crests at major 10 59th of 370 gauges in Texas
Most recent flood crest June 20, 2025 16.52 ft, minor flooding Listed crests at the South Sulphur River near Cooper, 1945 to 2025 16 18 20 22 24 26 28 ft Flood stage 16.0 ft Major 25.0 ft Mar 31, 1945: 24.50 ft, moderate flooding; 16,400 cubic feet per second Nov 4, 1946: 24.02 ft, moderate flooding; 14,800 cubic feet per second Feb 13, 1950: 25.09 ft, major flooding; 18,300 cubic feet per second Apr 29, 1953: 26.00 ft, major flooding; 23,800 cubic feet per second Oct 25, 1954: 22.19 ft, moderate flooding; 10,000 cubic feet per second Apr 27, 1957: 25.37 ft, major flooding; 23,200 cubic feet per second Nov 6, 1957: 25.36 ft, major flooding; 23,200 cubic feet per second Dec 16, 1959: 22.83 ft, moderate flooding; 13,600 cubic feet per second Dec 11, 1960: 21.69 ft, moderate flooding; 10,300 cubic feet per second Sep 9, 1962: 22.31 ft, moderate flooding; 12,100 cubic feet per second Feb 10, 1965: 24.47 ft, moderate flooding; 25,000 cubic feet per second May 11, 1965: 20.49 ft, moderate flooding; 20,000 cubic feet per second Apr 30, 1966: 26.02 ft, major flooding; 30,500 cubic feet per second May 7, 1969: 25.77 ft, major flooding; 31,500 cubic feet per second Apr 26, 1970: 21.95 ft, moderate flooding; 14,000 cubic feet per second Dec 10, 1971: 26.15 ft, major flooding; 42,500 cubic feet per second Apr 25, 1973: 22.45 ft, moderate flooding; 19,700 cubic feet per second Apr 23, 1974: 22.56 ft, moderate flooding; 20,300 cubic feet per second Feb 2, 1975: 25.68 ft, major flooding; 23,800 cubic feet per second Mar 28, 1977: 25.16 ft, major flooding; 21,700 cubic feet per second May 5, 1979: 23.91 ft, moderate flooding; 23,300 cubic feet per second Jan 23, 1980: 20.09 ft, moderate flooding; 5,600 cubic feet per second Jun 6, 1981: 23.44 ft, moderate flooding; 18,600 cubic feet per second May 13, 1982: 27.21 ft, major flooding; 47,200 cubic feet per second Feb 22, 1983: 21.46 ft, moderate flooding; 18,000 cubic feet per second Mar 24, 1984: 21.27 ft, moderate flooding Mar 21, 1985: 21.28 ft, moderate flooding; 13,500 cubic feet per second Dec 27, 1987: 20.84 ft, moderate flooding; 12,600 cubic feet per second Jul 16, 1989: 21.75 ft, moderate flooding; 11,400 cubic feet per second May 3, 1990: 23.76 ft, moderate flooding; 30,200 cubic feet per second Dec 3, 1993: 18.57 ft, minor flooding; 4,410 cubic feet per second May 14, 1995: 19.90 ft, minor flooding; 4,710 cubic feet per second Feb 21, 1997: 19.45 ft, minor flooding; 6,160 cubic feet per second Dec 4, 1998: 18.93 ft, minor flooding; 4,820 cubic feet per second Jun 22, 2000: 18.51 ft, minor flooding; 3,960 cubic feet per second Nov 30, 2000: 19.98 ft, minor flooding; 7,760 cubic feet per second Jan 2, 2001: 16.02 ft, minor flooding; 1,839 cubic feet per second Feb 16, 2001: 18.91 ft, minor flooding; 5,238 cubic feet per second Feb 28, 2001: 18.92 ft, minor flooding; 5,262 cubic feet per second Mar 24, 2001: 18.85 ft, minor flooding; 5,101 cubic feet per second Oct 19, 2002: 19.61 ft, minor flooding; 6,884 cubic feet per second Oct 23, 2002: 16.47 ft, minor flooding; 2,051 cubic feet per second Mar 20, 2006: 19.17 ft, minor flooding; 6,264 cubic feet per second Jul 10, 2007: 16.21 ft, minor flooding; 3,023 cubic feet per second Mar 7, 2008: 18.88 ft, minor flooding; 5,164 cubic feet per second Mar 19, 2008: 19.62 ft, minor flooding; 6,825 cubic feet per second Apr 9, 2008: 18.48 ft, minor flooding; 4,747 cubic feet per second May 3, 2009: 18.59 ft, minor flooding; 4,894 cubic feet per second May 7, 2009: 17.14 ft, minor flooding; 3,298 cubic feet per second May 12, 2009: 17.59 ft, minor flooding; 3,574 cubic feet per second May 16, 2009: 16.66 ft, minor flooding; 3,072 cubic feet per second Oct 10, 2009: 17.47 ft, minor flooding; 3,464 cubic feet per second Oct 14, 2009: 18.63 ft, minor flooding; 4,960 cubic feet per second Oct 22, 2009: 18.86 ft, minor flooding; 5,351 cubic feet per second Oct 26, 2009: 18.19 ft, minor flooding; 4,292 cubic feet per second Oct 30, 2009: 16.56 ft, minor flooding; 3,026 cubic feet per second Feb 5, 2010: 18.35 ft, minor flooding; 4,525 cubic feet per second Feb 9, 2010: 19.08 ft, minor flooding; 5,776 cubic feet per second Feb 13, 2010: 16.78 ft, minor flooding; 3,115 cubic feet per second Jan 26, 2012: 16.51 ft, minor flooding; 3,004 cubic feet per second Mar 21, 2012: 18.45 ft, minor flooding; 4,678 cubic feet per second Mar 20, 2015: 17.00 ft, minor flooding; 3,182 cubic feet per second May 17, 2015: 17.48 ft, minor flooding; 3,920 cubic feet per second May 25, 2015: 19.36 ft, minor flooding; 7,260 cubic feet per second Nov 28, 2015: 18.02 ft, minor flooding; 3,955 cubic feet per second Dec 4, 2015: 17.65 ft, minor flooding; 4,420 cubic feet per second Dec 13, 2015: 19.32 ft, minor flooding; 6,360 cubic feet per second Dec 28, 2015: 19.42 ft, minor flooding; 6,609 cubic feet per second Jan 3, 2016: 17.53 ft, minor flooding; 4,202 cubic feet per second Jan 7, 2016: 16.37 ft, minor flooding; 3,280 cubic feet per second Mar 11, 2016: 17.25 ft, minor flooding; 3,868 cubic feet per second Apr 20, 2016: 19.16 ft, minor flooding; 6,010 cubic feet per second Apr 30, 2016: 20.05 ft, moderate flooding; 8,340 cubic feet per second Aug 17, 2017: 19.38 ft, minor flooding; 3,410 cubic feet per second Feb 21, 2018: 21.17 ft, moderate flooding; 4,560 cubic feet per second Mar 2, 2018: 22.96 ft, moderate flooding; 8,050 cubic feet per second Oct 16, 2018: 20.79 ft, moderate flooding; 4,230 cubic feet per second Oct 20, 2018: 19.82 ft, minor flooding; 3,540 cubic feet per second Nov 1, 2018: 21.87 ft, moderate flooding; 5,310 cubic feet per second Dec 27, 2018: 20.08 ft, moderate flooding; 3,750 cubic feet per second Dec 31, 2018: 16.64 ft, minor flooding; 2,390 cubic feet per second Jan 4, 2019: 18.82 ft, minor flooding; 3,170 cubic feet per second Jan 8, 2019: 18.70 ft, minor flooding; 3,120 cubic feet per second Feb 20, 2019: 17.94 ft, minor flooding; 2,830 cubic feet per second Apr 14, 2019: 16.02 ft, minor flooding; 1,820 cubic feet per second Apr 18, 2019: 18.11 ft, minor flooding; 2,390 cubic feet per second Apr 25, 2019: 16.81 ft, minor flooding; 1,940 cubic feet per second May 2, 2019: 20.42 ft, moderate flooding; 4,020 cubic feet per second May 12, 2019: 19.53 ft, minor flooding; 3,220 cubic feet per second May 19, 2019: 21.79 ft, moderate flooding; 6,030 cubic feet per second May 30, 2019: 21.85 ft, moderate flooding; 6,150 cubic feet per second Jun 20, 2019: 19.55 ft, minor flooding; 3,230 cubic feet per second Jun 24, 2019: 21.54 ft, moderate flooding; 5,670 cubic feet per second Feb 20, 2020: 19.78 ft, minor flooding; 3,781 cubic feet per second Mar 18, 2020: 22.53 ft, moderate flooding; 8,967 cubic feet per second May 26, 2020: 16.70 ft, minor flooding; 2,014 cubic feet per second Jan 1, 2021: 18.17 ft, minor flooding; 2,589 cubic feet per second Feb 26, 2021: 19.96 ft, minor flooding; 4,002 cubic feet per second Apr 30, 2021: 18.74 ft, minor flooding; 2,889 cubic feet per second May 12, 2021: 16.48 ft, minor flooding; 1,949 cubic feet per second May 17, 2021: 19.82 ft, minor flooding; 3,830 cubic feet per second May 28, 2021: 20.73 ft, moderate flooding; 5,029 cubic feet per second Jun 1, 2021: 19.15 ft, minor flooding; 3,174 cubic feet per second Jun 6, 2021: 20.30 ft, moderate flooding; 4,418 cubic feet per second Feb 8, 2023: 21.59 ft, moderate flooding; 5,931 cubic feet per second Jun 14, 2023: 17.24 ft, minor flooding; 2,301 cubic feet per second Mar 22, 2024: 18.58 ft, minor flooding; 3,177 cubic feet per second Mar 26, 2024: 21.17 ft, moderate flooding; 5,858 cubic feet per second Apr 21, 2024: 16.46 ft, minor flooding; 3,013 cubic feet per second Apr 28, 2024: 18.10 ft, minor flooding; 4,144 cubic feet per second May 5, 2024: 17.71 ft, minor flooding; 3,883 cubic feet per second Jun 4, 2024: 21.52 ft, moderate flooding; 8,089 cubic feet per second Jan 30, 2025: 20.25 ft, moderate flooding; 6,024 cubic feet per second Apr 5, 2025: 21.79 ft, moderate flooding; 8,473 cubic feet per second Apr 11, 2025: 16.89 ft, minor flooding; 3,233 cubic feet per second May 7, 2025: 19.45 ft, minor flooding; 5,154 cubic feet per second Jun 12, 2025: 20.38 ft, moderate flooding; 6,206 cubic feet per second Jun 20, 2025: 16.52 ft, minor flooding; 3,032 cubic feet per second Highest, 27.21 ft, May 13, 1982 1960 1980 2000 2020 Crests at or above flood stage, by decade Crests at or above flood stage per decade, South Sulphur River near Cooper 1940s: 2 1950s: 6 1960s: 6 1970s: 7 1980s: 8 1990s: 5 2000s: 22 2010s: 37 37 2020s: 25 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. Delta County: every hazard · River floods across the country · Texas
NOAA National Water Prediction Service, gauge COPT2, 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.