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Big River at Byrnesville

Highest listed crest 30.20 ftFlood stage 16.0 ft70 crests since 1915

The Big River at Byrnesville crested at major flood stage 3 times among the 70 crests the National Weather Service lists from 1915 to 2026. The highest, 30.20 ft on August 21, 1915, was major flooding, 14.20 feet above flood stage.

The gauge

Highest listed crest
30.20 ft
August 21, 1915; 80,000 cubic feet per second
Flood stage
16.0 ft
Major flooding from 28.0 ft
Crests at major
3
69th of 173 gauges in Missouri
Most recent flood crest
March 7, 2026
22.22 ft, moderate flooding
Location
Jefferson County
Near Eureka (7.4 mi), Wildwood (12.9 mi), Ellisville (13.9 mi)

Flood stages

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

Flood categories, Big River at Byrnesville
Action stage13.02Nov 19, 2003The level at which the NWS or its partners begin to take action
Flood stage (minor)16.030Apr 21, 2025Minimal or no property damage, but possibly some public threat
Moderate flood stage20.035Mar 7, 2026Some inundation of structures and roads near the stream
Major flood stage28.03May 1, 2017Extensive inundation of structures and roads

Every listed crest

70 crests from 1915 to 2026. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Big River at Byrnesville, 1915 to 2026 1520253035ft Flood stage 16.0 ftMajor 28.0 ft Aug 21, 1915: 30.20 ft, major flooding; 80,000 cubic feet per secondMar 12, 1935: 24.65 ft, moderate flooding; 28,800 cubic feet per secondJan 5, 1950: 25.23 ft, moderate flooding; 36,900 cubic feet per secondJul 1, 1957: 26.41 ft, moderate flooding; 42,100 cubic feet per secondApr 13, 1979: 25.10 ft, moderate flooding; 36,200 cubic feet per secondDec 5, 1982: 25.18 ft, moderate flooding; 36,600 cubic feet per secondMay 2, 1983: 26.42 ft, moderate flooding; 42,800 cubic feet per secondNov 21, 1985: 26.47 ft, moderate flooding; 43,000 cubic feet per secondMay 27, 1990: 24.37 ft, moderate flooding; 32,600 cubic feet per secondSep 25, 1993: 29.37 ft, major flooding; 63,600 cubic feet per secondNov 16, 1993: 27.61 ft, moderate flooding; 50,200 cubic feet per secondApr 12, 1994: 27.57 ft, moderate flooding; 49,900 cubic feet per secondApr 30, 1994: 21.55 ft, moderate flooding; 21,400 cubic feet per secondApr 24, 1996: 20.08 ft, moderate flooding; 17,000 cubic feet per secondMay 15, 1996: 15.31 ft, action stage; 8,570 cubic feet per secondNov 27, 1996: 17.72 ft, minor flooding; 13,000 cubic feet per secondJan 29, 1997: 16.08 ft, minor flooding; 10,400 cubic feet per secondFeb 28, 1997: 19.99 ft, minor flooding; 17,017 cubic feet per secondJun 23, 1997: 20.65 ft, moderate flooding; 18,400 cubic feet per secondMay 7, 2000: 22.44 ft, moderate flooding; 23,400 cubic feet per secondDec 19, 2001: 17.90 ft, minor flooding; 12,300 cubic feet per secondMay 10, 2002: 22.50 ft, moderate flooding; 24,000 cubic feet per secondMay 7, 2003: 18.71 ft, minor flooding; 13,800 cubic feet per secondNov 19, 2003: 15.12 ft, action stage; 7,980 cubic feet per secondJan 7, 2005: 19.00 ft, minor flooding; 14,400 cubic feet per secondJan 15, 2005: 19.40 ft, minor flooding; 15,200 cubic feet per secondApr 23, 2005: 19.58 ft, minor flooding; 15,900 cubic feet per secondMar 13, 2006: 21.47 ft, moderate flooding; 22,200 cubic feet per secondDec 3, 2006: 17.99 ft, minor flooding; 12,100 cubic feet per secondMar 20, 2008: 27.57 ft, moderate flooding; 47,300 cubic feet per secondApr 2, 2008: 19.12 ft, minor floodingApr 12, 2008: 21.49 ft, moderate flooding; 21,400 cubic feet per secondSep 14, 2008: 18.06 ft, minor flooding; 12,200 cubic feet per secondMay 10, 2009: 22.69 ft, moderate flooding; 25,400 cubic feet per secondNov 1, 2009: 24.70 ft, moderate flooding; 33,300 cubic feet per secondNov 18, 2009: 16.21 ft, minor flooding; 9,180 cubic feet per secondMar 16, 2011: 17.36 ft, minor flooding; 11,500 cubic feet per secondApr 29, 2011: 22.78 ft, moderate flooding; 24,300 cubic feet per secondMay 4, 2011: 16.00 ft, minor flooding; 8,870 cubic feet per secondJan 31, 2013: 18.02 ft, minor flooding; 12,100 cubic feet per secondFeb 28, 2013: 16.27 ft, minor flooding; 9,270 cubic feet per secondMar 20, 2013: 23.51 ft, moderate flooding; 28,400 cubic feet per secondApr 20, 2013: 23.58 ft, moderate flooding; 28,700 cubic feet per secondMay 5, 2013: 21.97 ft, moderate flooding; 22,900 cubic feet per secondJun 2, 2013: 21.40 ft, moderate flooding; 21,100 cubic feet per secondApr 4, 2014: 16.81 ft, minor flooding; 10,100 cubic feet per secondApr 10, 2015: 20.94 ft, moderate flooding; 19,700 cubic feet per secondJun 22, 2015: 21.70 ft, moderate flooding; 22,000 cubic feet per secondJul 2, 2015: 18.32 ft, minor flooding; 12,900 cubic feet per secondDec 29, 2015: 27.18 ft, moderate flooding; 45,200 cubic feet per secondMay 1, 2017: 30.09 ft, major flooding; 62,900 cubic feet per secondFeb 21, 2018: 22.61 ft, moderate flooding; 25,100 cubic feet per secondMar 31, 2018: 18.67 ft, minor flooding; 13,700 cubic feet per secondDec 17, 2018: 18.54 ft, minor flooding; 13,350 cubic feet per secondFeb 9, 2019: 16.65 ft, minor flooding; 9,852 cubic feet per secondJan 13, 2020: 21.11 ft, moderate flooding; 19,000 cubic feet per secondApr 25, 2020: 16.70 ft, minor flooding; 9,930 cubic feet per secondMay 25, 2020: 16.65 ft, minor flooding; 9,850 cubic feet per secondJan 26, 2021: 16.04 ft, minor flooding; 8,930 cubic feet per secondMar 14, 2021: 18.67 ft, minor flooding; 13,300 cubic feet per secondMar 20, 2021: 18.46 ft, minor flooding; 12,900 cubic feet per secondApr 30, 2021: 16.47 ft, minor flooding; 9,580 cubic feet per secondFeb 19, 2022: 20.39 ft, moderate flooding; 17,200 cubic feet per secondMar 5, 2023: 19.70 ft, minor flooding; 15,500 cubic feet per secondMar 26, 2023: 21.95 ft, moderate flooding; 21,400 cubic feet per secondAug 5, 2023: 19.70 ft, minor flooding; 15,500 cubic feet per secondNov 6, 2024: 27.57 ft, moderate flooding; 44,600 cubic feet per secondApr 7, 2025: 23.93 ft, moderate flooding; 28,100 cubic feet per secondApr 21, 2025: 18.62 ft, minor flooding; 13,300 cubic feet per secondMar 7, 2026: 22.22 ft, moderate flooding; 22,200 cubic feet per second Highest, 30.20 ft, Aug 21, 1915 192019401960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Big River at Byrnesville 1910s: 1 1920s: 0 1930s: 1 1940s: 0 1950s: 2 1960s: 0 1970s: 1 1980s: 3 1990s: 10 2000s: 16 2010s: 19 19 2020s: 15 1910s1920s1930s1940s1950s1960s1970s1980s1990s2000s2010s2020s
  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 70 listed crests.

Highest listed crests, Big River at Byrnesville
1Aug 21, 191530.20+14.20Major80,000
2May 1, 201730.09+14.09Major62,900
3Sep 25, 199329.37+13.37Major63,600
4Nov 16, 199327.61+11.61Moderate50,200
5Apr 12, 199427.57+11.57Moderate49,900
6Mar 20, 200827.57+11.57Moderate47,300
7Nov 6, 202427.57+11.57Moderate44,600
8Dec 29, 201527.18+11.18Moderate45,200
9Nov 21, 198526.47+10.47Moderate43,000
10May 2, 198326.42+10.42Moderate42,800
11Jul 1, 195726.41+10.41Moderate42,100
12Jan 5, 195025.23+9.23Moderate36,900
13Dec 5, 198225.18+9.18Moderate36,600
14Apr 13, 197925.10+9.10Moderate36,200
15Nov 1, 200924.70+8.70Moderate33,300
16Mar 12, 193524.65+8.65Moderate28,800
17May 27, 199024.37+8.37Moderate32,600
18Apr 7, 202523.93+7.93Moderate28,100
19Apr 20, 201323.58+7.58Moderate28,700
20Mar 20, 201323.51+7.51Moderate28,400
21Apr 29, 201122.78+6.78Moderate24,300
22May 10, 200922.69+6.69Moderate25,400
23Feb 21, 201822.61+6.61Moderate25,100
24May 10, 200222.50+6.50Moderate24,000
25May 7, 200022.44+6.44Moderate23,400
26Mar 7, 202622.22+6.22Moderate22,200
27May 5, 201321.97+5.97Moderate22,900
28Mar 26, 202321.95+5.95Moderate21,400
29Jun 22, 201521.70+5.70Moderate22,000
30Apr 30, 199421.55+5.55Moderate21,400
31Apr 12, 200821.49+5.49Moderate21,400
32Mar 13, 200621.47+5.47Moderate22,200
33Jun 2, 201321.40+5.40Moderate21,100
34Jan 13, 202021.11+5.11Moderate19,000
35Apr 10, 201520.94+4.94Moderate19,700
36Jun 23, 199720.65+4.65Moderate18,400
37Feb 19, 202220.39+4.39Moderate17,200
38Apr 24, 199620.08+4.08Moderate17,000
39Feb 28, 199719.99+3.99Minor17,017
40Mar 5, 202319.70+3.70Minor15,500
41Aug 5, 202319.70+3.70Minor15,500
42Apr 23, 200519.58+3.58Minor15,900
43Jan 15, 200519.40+3.40Minor15,200
44Apr 2, 200819.12+3.12Minor—
45Jan 7, 200519.00+3.00Minor14,400
46May 7, 200318.71+2.71Minor13,800
47Mar 31, 201818.67+2.67Minor13,700
48Mar 14, 202118.67+2.67Minor13,300
49Apr 21, 202518.62+2.62Minor13,300
50Dec 17, 201818.54+2.54Minor13,350

Other gauges in Jefferson County

Flood gauges in Jefferson County
DeSoto10.014.30 ft, Apr 13, 20131
Arnold24.047.26 ft, Dec 31, 201512
Pacific15.033.42 ft, Dec 30, 20155
Herculaneum26.029.79 ft, Jul 10, 20240

Jefferson County: every hazard · River floods across the country · Missouri

NOAA National Water Prediction Service, gauge BYRM7, 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.