Highest listed crest 26.06 ft May 8, 2019; 24,600 cubic feet per second
Flood stage 19.0 ft Major flooding from 23.5 ft
Crests at major 10 4th of 171 gauges in Kansas
Most recent flood crest October 15, 2026 20.64 ft, minor flooding Listed crests at the Slate Creek (KS) at Wellington, 1964 to 2026 5 10 15 20 25 30 ft Flood stage 19.0 ft Major 23.5 ft Nov 15, 1964: 23.44 ft, moderate flooding; 9,000 cubic feet per second Jun 1, 1969: 21.77 ft, minor flooding; 4,130 cubic feet per second Apr 18, 1970: 22.09 ft, moderate flooding; 4,510 cubic feet per second Jul 2, 1971: 13.13 ft, below flood stage; 884 cubic feet per second Oct 30, 1971: 19.05 ft, minor flooding; 2,360 cubic feet per second Mar 11, 1973: 22.28 ft, moderate flooding; 4,980 cubic feet per second Mar 31, 1973: 21.39 ft, minor flooding; 4,090 cubic feet per second Sep 23, 1973: 21.20 ft, minor flooding; 3,900 cubic feet per second Sep 27, 1973: 22.28 ft, moderate flooding; 4,980 cubic feet per second Oct 11, 1973: 22.82 ft, moderate flooding; 5,560 cubic feet per second Jun 7, 1974: 19.03 ft, minor flooding; 2,620 cubic feet per second Nov 3, 1974: 21.52 ft, minor flooding; 4,420 cubic feet per second Jun 17, 1975: 25.82 ft, major flooding; 28,500 cubic feet per second Jul 2, 1976: 23.80 ft, major flooding; 10,700 cubic feet per second May 23, 1977: 18.88 ft, action stage; 2,570 cubic feet per second Aug 19, 1977: 20.78 ft, minor flooding; 3,930 cubic feet per second Aug 23, 1977: 21.20 ft, minor flooding; 4,390 cubic feet per second Sep 2, 1977: 18.09 ft, action stage; 2,220 cubic feet per second Jul 7, 1978: 18.32 ft, action stage; 2,310 cubic feet per second Mar 19, 1979: 19.12 ft, minor flooding; 2,700 cubic feet per second Mar 23, 1979: 20.18 ft, minor flooding; 3,360 cubic feet per second Oct 31, 1979: 20.15 ft, minor flooding; 3,340 cubic feet per second Aug 17, 1980: 22.02 ft, moderate flooding; 5,740 cubic feet per second Sep 1, 1981: 11.17 ft, below flood stage; 638 cubic feet per second Jun 18, 1982: 23.32 ft, moderate flooding; 8,830 cubic feet per second Mar 27, 1983: 19.79 ft, minor flooding; 3,110 cubic feet per second Apr 1, 1983: 23.50 ft, major flooding; 9,520 cubic feet per second Apr 5, 1983: 20.34 ft, minor flooding; 3,460 cubic feet per second Jun 29, 1983: 19.05 ft, minor flooding; 2,660 cubic feet per second Mar 19, 1984: 19.68 ft, minor flooding; 3,040 cubic feet per second Mar 24, 1984: 21.68 ft, minor flooding; 4,960 cubic feet per second Apr 8, 1984: 20.14 ft, minor flooding; 3,330 cubic feet per second Jun 9, 1984: 20.49 ft, minor flooding; 3,570 cubic feet per second Sep 14, 1985: 19.14 ft, minor flooding; 2,710 cubic feet per second Oct 10, 1985: 22.74 ft, moderate flooding; 7,140 cubic feet per second Nov 15, 1985: 19.54 ft, minor flooding; 2,490 cubic feet per second Sep 30, 1986: 20.61 ft, minor flooding; 3,190 cubic feet per second Mar 1, 1987: 20.42 ft, minor flooding; 2,980 cubic feet per second Mar 17, 1987: 20.99 ft, minor flooding; 3,810 cubic feet per second Mar 24, 1987: 20.78 ft, minor flooding; 3,460 cubic feet per second May 28, 1987: 20.94 ft, minor flooding; 3,730 cubic feet per second Aug 13, 1987: 20.84 ft, minor flooding; 3,560 cubic feet per second Apr 2, 1988: 21.64 ft, minor flooding; 5,050 cubic feet per second Sep 9, 1989: 21.36 ft, minor flooding; 4,490 cubic feet per second Sep 13, 1989: 19.16 ft, minor flooding; 2,300 cubic feet per second Mar 7, 1990: 18.54 ft, action stage; 2,540 cubic feet per second Sep 2, 1991: 9.84 ft, below flood stage; 544 cubic feet per second Nov 17, 1991: 17.70 ft, action stage; 2,270 cubic feet per second Nov 19, 1992: 20.76 ft, minor flooding; 3,800 cubic feet per second May 3, 1993: 21.85 ft, minor flooding; 5,710 cubic feet per second May 10, 1993: 22.56 ft, moderate flooding; 7,530 cubic feet per second May 18, 1993: 20.29 ft, minor flooding; 3,370 cubic feet per second Jul 15, 1993: 21.29 ft, minor flooding; 4,550 cubic feet per second Jul 25, 1994: 13.64 ft, below flood stage; 1,220 cubic feet per second Nov 24, 1994: 19.91 ft, minor flooding Jun 9, 1995: 22.65 ft, moderate flooding; 7,670 cubic feet per second Aug 4, 1995: 20.24 ft, minor flooding; 3,341 cubic feet per second Jun 1, 1996: 18.27 ft, action stage; 2,430 cubic feet per second Apr 11, 1997: 21.79 ft, minor flooding; 5,570 cubic feet per second Nov 1, 1998: 23.70 ft, major flooding; 11,500 cubic feet per second Mar 24, 2000: 21.60 ft, minor flooding; 5,740 cubic feet per second Feb 25, 2001: 21.15 ft, minor flooding; 5,040 cubic feet per second May 8, 2002: 19.52 ft, minor flooding; 3,320 cubic feet per second Oct 4, 2002: 21.78 ft, minor flooding; 6,000 cubic feet per second Apr 25, 2003: 19.75 ft, minor flooding Oct 10, 2003: 19.45 ft, minor flooding; 2,924 cubic feet per second Mar 5, 2004: 21.70 ft, minor flooding; 6,775 cubic feet per second Apr 24, 2004: 19.97 ft, minor flooding; 3,195 cubic feet per second May 14, 2004: 22.39 ft, moderate flooding; 7,050 cubic feet per second Jul 3, 2004: 19.38 ft, minor flooding; 2,889 cubic feet per second Jun 12, 2005: 21.40 ft, minor flooding; 5,869 cubic feet per second Jul 5, 2005: 22.70 ft, moderate flooding; 7,940 cubic feet per second May 9, 2006: 15.94 ft, below flood stage; 1,640 cubic feet per second Mar 31, 2007: 19.80 ft, minor flooding; 3,203 cubic feet per second Apr 15, 2007: 19.50 ft, minor flooding; 3,013 cubic feet per second Jun 30, 2007: 22.92 ft, moderate flooding; 5,630 cubic feet per second May 27, 2008: 22.37 ft, moderate flooding; 7,014 cubic feet per second Jun 17, 2008: 19.98 ft, minor flooding; 3,317 cubic feet per second Jun 29, 2008: 18.16 ft, action stage; 2,310 cubic feet per second Sep 13, 2008: 24.28 ft, major flooding; 14,100 cubic feet per second Apr 20, 2009: 19.91 ft, minor flooding; 3,272 cubic feet per second Apr 27, 2009: 23.80 ft, major flooding; 11,900 cubic feet per second Jul 21, 2009: 19.74 ft, minor flooding; 3,165 cubic feet per second May 26, 2010: 20.62 ft, minor flooding; 4,180 cubic feet per second Jun 15, 2010: 19.78 ft, minor flooding; 3,190 cubic feet per second Dec 20, 2011: 18.36 ft, action stage; 2,880 cubic feet per second Aug 9, 2013: 20.39 ft, minor flooding; 3,180 cubic feet per second May 18, 2015: 19.91 ft, minor flooding; 2,740 cubic feet per second May 24, 2015: 21.21 ft, minor flooding; 4,470 cubic feet per second Apr 28, 2016: 19.98 ft, minor flooding; 2,802 cubic feet per second May 18, 2016: 20.28 ft, minor flooding; 2,970 cubic feet per second Aug 20, 2016: 21.59 ft, minor flooding; 5,007 cubic feet per second Sep 10, 2016: 22.99 ft, moderate flooding; 8,720 cubic feet per second Sep 26, 2016: 19.52 ft, minor flooding; 2,621 cubic feet per second Mar 29, 2017: 19.34 ft, minor flooding; 2,565 cubic feet per second May 13, 2017: 20.36 ft, minor flooding; 3,010 cubic feet per second Jul 31, 2018: 20.07 ft, minor flooding; 2,849 cubic feet per second May 8, 2019: 26.06 ft, major flooding; 24,600 cubic feet per second May 21, 2019: 22.91 ft, moderate flooding; 7,079 cubic feet per second May 27, 2019: 22.27 ft, moderate flooding; 5,358 cubic feet per second Jun 19, 2019: 19.53 ft, minor flooding; 2,883 cubic feet per second Jun 24, 2019: 21.39 ft, minor flooding; 3,898 cubic feet per second Aug 26, 2019: 20.04 ft, minor flooding; 3,057 cubic feet per second Oct 4, 2019: 21.02 ft, minor flooding; 3,587 cubic feet per second Oct 30, 2020: 18.72 ft, action stage; 2,610 cubic feet per second Mar 18, 2021: 21.44 ft, minor flooding; 3,920 cubic feet per second Mar 23, 2021: 20.89 ft, minor flooding; 3,490 cubic feet per second May 25, 2022: 21.67 ft, minor flooding; 3,830 cubic feet per second Dec 25, 2023: 17.50 ft, action stage; 2,240 cubic feet per second Nov 9, 2024: 13.55 ft, below flood stage; 1,210 cubic feet per second Jun 7, 2025: 21.63 ft, minor flooding; 4,120 cubic feet per second Jun 18, 2025: 24.44 ft, major flooding; 13,200 cubic feet per second Jul 17, 2025: 21.86 ft, minor flooding; 4,440 cubic feet per second Jul 31, 2025: 17.53 ft, action stage; 2,240 cubic feet per second Aug 28, 2025: 21.43 ft, minor flooding; 3,910 cubic feet per second Sep 23, 2025: 21.86 ft, minor flooding; 4,440 cubic feet per second Jun 21, 2026: 24.79 ft, major flooding; 15,191 cubic feet per second Jun 26, 2026: 24.56 ft, major flooding; 14,193 cubic feet per second Oct 15, 2026: 20.64 ft, minor flooding; 3,334 cubic feet per second Highest, 26.06 ft, May 8, 2019 1970 1980 1990 2000 2010 2020 Crests at or above flood stage, by decade Crests at or above flood stage per decade, Slate Creek (KS) at Wellington 1960s: 2 1970s: 16 1980s: 22 22 1990s: 10 2000s: 21 2010s: 20 2020s: 11 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 Sumner County Sumner County: every hazard · River floods across the country · Kansas
NOAA National Water Prediction Service, gauge WELK1, 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.