Highest listed crest 18.49 ft August 1, 1971; 8,000 cubic feet per second
Flood stage 11.0 ft Major flooding from 18.0 ft
Crests at major 1 32nd of 108 gauges in Maryland
Most recent flood crest January 10, 2024 11.90 ft, minor flooding Listed crests at the Whitemarsh Run at White Marsh, 1960 to 2024 10 12 14 16 18 20 ft Flood stage 11.0 ft Major 18.0 ft Sep 12, 1960: 11.00 ft, minor flooding; 1,260 cubic feet per second Aug 25, 1967: 10.40 ft, action stage; 1,140 cubic feet per second Sep 10, 1968: 10.02 ft, action stage; 1,060 cubic feet per second Jun 14, 1971: 10.13 ft, action stage; 1,090 cubic feet per second Aug 1, 1971: 18.49 ft, major flooding; 8,000 cubic feet per second Aug 5, 1971: 10.15 ft, action stage; 1,090 cubic feet per second Aug 27, 1971: 12.04 ft, minor flooding; 1,580 cubic feet per second Sep 11, 1971: 15.86 ft, moderate flooding; 3,760 cubic feet per second Oct 10, 1971: 10.62 ft, action stage; 1,180 cubic feet per second Oct 26, 1971: 12.40 ft, minor flooding; 1,540 cubic feet per second Jun 22, 1972: 14.44 ft, minor flooding; 2,170 cubic feet per second Dec 8, 1972: 10.32 ft, action stage; 1,120 cubic feet per second Jul 3, 1973: 13.03 ft, minor flooding; 1,670 cubic feet per second Jul 6, 1974: 10.01 ft, action stage; 1,060 cubic feet per second Dec 16, 1974: 10.63 ft, action stage; 1,190 cubic feet per second Mar 19, 1975: 11.99 ft, minor flooding; 1,460 cubic feet per second Jun 28, 1975: 12.08 ft, minor flooding; 1,480 cubic feet per second Jul 13, 1975: 13.06 ft, minor flooding; 1,670 cubic feet per second Sep 26, 1975: 11.10 ft, minor flooding; 1,280 cubic feet per second Jan 1, 1976: 11.46 ft, minor flooding; 1,350 cubic feet per second Sep 16, 1976: 15.84 ft, moderate flooding; 3,460 cubic feet per second Oct 20, 1976: 10.20 ft, action stage; 1,100 cubic feet per second Mar 13, 1977: 10.16 ft, action stage; 1,090 cubic feet per second Jun 28, 1977: 12.69 ft, minor flooding; 1,600 cubic feet per second Aug 31, 1977: 12.57 ft, minor flooding; 1,570 cubic feet per second Dec 18, 1977: 13.97 ft, minor flooding; 1,930 cubic feet per second Jan 9, 1978: 11.51 ft, minor flooding; 1,360 cubic feet per second Mar 26, 1978: 11.35 ft, minor flooding; 1,330 cubic feet per second Aug 1, 1978: 11.35 ft, minor flooding; 1,330 cubic feet per second Aug 11, 1978: 11.49 ft, minor flooding; 1,360 cubic feet per second Aug 27, 1978: 16.17 ft, moderate flooding; 3,880 cubic feet per second Feb 24, 1979: 10.98 ft, action stage; 1,260 cubic feet per second Apr 27, 1979: 11.92 ft, minor flooding; 1,440 cubic feet per second Jul 29, 1979: 12.97 ft, minor flooding; 1,650 cubic feet per second Aug 2, 1979: 13.21 ft, minor flooding; 1,700 cubic feet per second Sep 6, 1979: 15.09 ft, moderate flooding; 2,640 cubic feet per second Sep 21, 1979: 12.59 ft, minor flooding; 1,580 cubic feet per second Apr 27, 1980: 11.47 ft, minor flooding; 1,350 cubic feet per second Jun 14, 1981: 11.80 ft, minor flooding; 1,420 cubic feet per second Jun 25, 1981: 10.26 ft, action stage; 1,110 cubic feet per second Jul 4, 1981: 11.07 ft, minor flooding; 1,270 cubic feet per second Aug 11, 1981: 11.08 ft, minor flooding; 1,270 cubic feet per second Jun 13, 1982: 10.77 ft, action stage; 1,210 cubic feet per second Mar 27, 1983: 13.84 ft, minor flooding; 1,910 cubic feet per second May 22, 1983: 11.52 ft, minor flooding; 1,360 cubic feet per second Jul 4, 1983: 14.60 ft, minor flooding; 2,300 cubic feet per second Dec 12, 1983: 12.20 ft, minor flooding; 1,500 cubic feet per second Mar 29, 1984: 11.80 ft, minor flooding; 1,420 cubic feet per second Apr 5, 1984: 11.03 ft, minor flooding; 1,260 cubic feet per second Aug 3, 1984: 10.56 ft, action stage; 1,170 cubic feet per second Aug 13, 1984: 11.52 ft, minor flooding; 1,360 cubic feet per second Aug 25, 1985: 11.91 ft, minor flooding; 1,440 cubic feet per second Sep 27, 1985: 15.53 ft, moderate flooding; 3,120 cubic feet per second Aug 21, 1986: 10.66 ft, action stage; 1,190 cubic feet per second Dec 24, 1986: 13.77 ft, minor flooding; 1,880 cubic feet per second Sep 8, 1987: 14.61 ft, minor flooding; 2,300 cubic feet per second May 24, 1988: 11.93 ft, minor flooding; 1,450 cubic feet per second Jul 23, 1988: 11.37 ft, minor flooding; 1,330 cubic feet per second Jul 28, 1988: 11.03 ft, minor flooding; 1,260 cubic feet per second Nov 28, 1988: 10.38 ft, action stage; 1,130 cubic feet per second May 6, 1989: 13.21 ft, minor flooding; 1,710 cubic feet per second May 23, 1989: 10.17 ft, action stage; 1,090 cubic feet per second Jun 9, 1989: 12.09 ft, minor flooding; 1,480 cubic feet per second Jun 23, 1989: 12.54 ft, minor flooding; 1,570 cubic feet per second Jul 6, 1989: 11.65 ft, minor flooding; 1,390 cubic feet per second Jul 16, 1989: 15.55 ft, moderate flooding; 3,140 cubic feet per second Jul 20, 1989: 13.83 ft, minor flooding; 1,880 cubic feet per second Nov 23, 1992: 11.11 ft, minor flooding; 1,280 cubic feet per second Nov 28, 1993: 11.23 ft, minor flooding; 1,300 cubic feet per second Dec 5, 1993: 11.83 ft, minor flooding; 1,430 cubic feet per second Jan 28, 1994: 10.28 ft, action stage; 1,110 cubic feet per second Jul 27, 1994: 11.35 ft, minor flooding; 1,330 cubic feet per second Aug 17, 1994: 11.46 ft, minor flooding; 1,350 cubic feet per second Aug 21, 1994: 10.00 ft, action stage; 1,050 cubic feet per second Jan 20, 1995: 11.08 ft, minor flooding; 1,270 cubic feet per second Jan 19, 1996: 13.27 ft, minor flooding; 1,720 cubic feet per second Apr 16, 1996: 11.18 ft, minor flooding; 1,290 cubic feet per second Jun 19, 1996: 10.95 ft, action stage; 1,250 cubic feet per second Mar 21, 1998: 10.88 ft, action stage; 1,230 cubic feet per second Sep 2, 1998: 10.64 ft, action stage; 1,180 cubic feet per second Aug 26, 1999: 14.22 ft, minor flooding; 1,930 cubic feet per second Sep 16, 1999: 12.19 ft, minor flooding; 2,450 cubic feet per second Mar 21, 2000: 11.28 ft, minor flooding; 1,310 cubic feet per second Jul 16, 2000: 11.26 ft, minor flooding; 1,310 cubic feet per second Jul 26, 2000: 10.39 ft, action stage; 1,130 cubic feet per second Dec 17, 2000: 10.97 ft, action stage; 1,250 cubic feet per second Jul 23, 2002: 10.07 ft, action stage; 863 cubic feet per second Feb 22, 2003: 10.81 ft, action stage; 1,070 cubic feet per second May 26, 2003: 10.10 ft, action stage; 872 cubic feet per second Jun 7, 2003: 10.70 ft, action stage; 1,040 cubic feet per second Jun 13, 2003: 11.61 ft, minor flooding; 1,280 cubic feet per second Jun 20, 2003: 11.00 ft, minor flooding; 1,120 cubic feet per second Jul 6, 2003: 11.42 ft, minor flooding; 1,230 cubic feet per second Sep 4, 2003: 10.36 ft, action stage; 948 cubic feet per second Sep 13, 2003: 10.47 ft, action stage; 981 cubic feet per second Sep 19, 2003: 10.87 ft, action stage; 1,090 cubic feet per second Sep 23, 2003: 11.96 ft, minor flooding; 1,360 cubic feet per second Oct 14, 2003: 11.07 ft, minor flooding; 1,140 cubic feet per second Oct 27, 2003: 10.54 ft, action stage; 1,000 cubic feet per second Nov 19, 2003: 10.97 ft, action stage; 1,110 cubic feet per second Dec 11, 2003: 10.64 ft, action stage; 1,030 cubic feet per second Jul 27, 2004: 12.15 ft, minor flooding; 1,410 cubic feet per second Sep 28, 2004: 10.46 ft, action stage; 978 cubic feet per second Mar 28, 2005: 10.26 ft, action stage; 1,140 cubic feet per second Oct 8, 2005: 12.15 ft, minor flooding; 1,610 cubic feet per second Dec 16, 2005: 10.11 ft, action stage; 1,110 cubic feet per second Jun 3, 2006: 13.47 ft, minor flooding; 2,400 cubic feet per second Jun 24, 2006: 10.24 ft, action stage; 1,130 cubic feet per second Jun 28, 2006: 13.96 ft, minor flooding; 2,720 cubic feet per second Jul 6, 2006: 13.00 ft, minor flooding; 2,060 cubic feet per second Sep 5, 2006: 10.49 ft, action stage; 1,180 cubic feet per second Nov 16, 2006: 13.21 ft, minor flooding; 2,210 cubic feet per second Sep 27, 2008: 10.32 ft, action stage; 1,150 cubic feet per second May 7, 2009: 11.01 ft, minor flooding; 1,270 cubic feet per second Jun 9, 2009: 10.58 ft, action stage; 1,190 cubic feet per second Sep 30, 2010: 16.73 ft, moderate flooding; 4,780 cubic feet per second May 19, 2011: 10.73 ft, action stage; 1,190 cubic feet per second Aug 14, 2011: 10.05 ft, action stage; 1,030 cubic feet per second Aug 19, 2011: 11.91 ft, minor flooding; 1,530 cubic feet per second Aug 28, 2011: 11.37 ft, minor flooding; 1,340 cubic feet per second Sep 9, 2011: 12.24 ft, minor flooding; 1,660 cubic feet per second Sep 23, 2011: 15.50 ft, moderate flooding; 3,830 cubic feet per second Jun 10, 2012: 15.86 ft, moderate flooding; 4,100 cubic feet per second Aug 14, 2012: 14.32 ft, minor flooding; 3,000 cubic feet per second Apr 30, 2014: 13.27 ft, minor flooding; 1,665 cubic feet per second Jun 27, 2015: 16.11 ft, moderate flooding; 4,300 cubic feet per second Jul 14, 2015: 12.66 ft, minor flooding; 1,562 cubic feet per second Aug 25, 2015: 11.14 ft, minor flooding; 1,295 cubic feet per second Dec 25, 2015: 11.38 ft, minor flooding; 1,338 cubic feet per second Feb 25, 2016: 13.93 ft, minor flooding; 2,730 cubic feet per second May 27, 2018: 13.42 ft, minor flooding; 2,370 cubic feet per second Aug 13, 2018: 12.27 ft, minor flooding; 1,673 cubic feet per second Sep 18, 2018: 14.24 ft, minor flooding; 2,940 cubic feet per second Jul 11, 2019: 13.73 ft, minor flooding; 2,590 cubic feet per second Jul 17, 2021: 11.55 ft, minor flooding; 1,900 cubic feet per second Jul 3, 2022: 11.88 ft, minor flooding; 1,522 cubic feet per second Jul 4, 2023: 12.44 ft, minor flooding; 1,737 cubic feet per second Sep 13, 2023: 11.36 ft, minor flooding; 1,336 cubic feet per second Jan 10, 2024: 11.90 ft, minor flooding; 1,530 cubic feet per second Highest, 18.49 ft, Aug 1, 1971 1960 1970 1980 1990 2000 2010 2020 Crests at or above flood stage, by decade Crests at or above flood stage per decade, Whitemarsh Run at White Marsh 1960s: 1 1970s: 25 25 1980s: 24 1990s: 10 2000s: 14 2010s: 17 2020s: 5 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 Baltimore County Baltimore County: every hazard · River floods across the country · Maryland
NOAA National Water Prediction Service, gauge WHMM2, 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.