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Cuivre River at Old Monroe

Highest listed crest 37.40 ftFlood stage 24.0 ft88 crests since 1970

The Cuivre River at Old Monroe crested at major flood stage 21 times among the 88 crests the National Weather Service lists from 1970 to 2023. The highest, 37.40 ft on December 4, 1982, was major flooding, 13.40 feet above flood stage. 1 other gauge on the Cuivre River crested above flood stage within a week of it.

The gauge

Highest listed crest
37.40 ft
December 4, 1982
Flood stage
24.0 ft
Major flooding from 30.0 ft
Crests at major
21
4th of 173 gauges in Missouri
Most recent flood crest
May 8, 2023
24.86 ft, minor flooding
Location
Lincoln County
Near Wentzville (10.3 mi), O'Fallon (10.4 mi), Lake St. Louis (10.5 mi)

Flood stages

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

Flood categories, Cuivre River at Old Monroe
Action stage22.00—The level at which the NWS or its partners begin to take action
Flood stage (minor)24.050May 8, 2023Minimal or no property damage, but possibly some public threat
Moderate flood stage27.017Jan 12, 2020Some inundation of structures and roads near the stream
Major flood stage30.021Jun 27, 2021Extensive inundation of structures and roads

Every listed crest

88 crests from 1970 to 2023. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Cuivre River at Old Monroe, 1970 to 2023 2025303540ft Flood stage 24.0 ftMajor 30.0 ft May 2, 1970: 29.20 ft, moderate floodingAug 10, 1970: 24.16 ft, minor floodingSep 25, 1970: 29.40 ft, moderate floodingApr 3, 1973: 33.70 ft, major floodingMay 18, 1975: 36.60 ft, major floodingApr 13, 1979: 32.50 ft, major floodingMay 20, 1981: 27.40 ft, moderate floodingJun 23, 1981: 24.00 ft, minor floodingJul 29, 1981: 25.70 ft, minor floodingFeb 1, 1982: 26.00 ft, minor floodingApr 23, 1982: 26.53 ft, minor floodingJun 5, 1982: 24.05 ft, minor floodingJul 19, 1982: 26.80 ft, minor floodingDec 4, 1982: 37.40 ft, major floodingMay 1, 1983: 32.10 ft, major floodingDec 16, 1983: 24.08 ft, minor floodingMar 24, 1984: 26.10 ft, minor floodingJan 2, 1985: 28.60 ft, moderate floodingFeb 24, 1985: 33.90 ft, major floodingNov 20, 1985: 28.00 ft, moderate floodingJun 2, 1986: 25.50 ft, minor floodingOct 7, 1986: 30.80 ft, major floodingMay 18, 1990: 31.00 ft, major floodingApr 6, 1993: 30.10 ft, major floodingAug 1, 1993: 35.50 ft, major floodingMay 18, 1995: 33.00 ft, major floodingApr 30, 1996: 26.70 ft, minor floodingMay 31, 1996: 27.90 ft, moderate floodingFeb 26, 2001: 25.00 ft, minor floodingApr 12, 2001: 25.60 ft, minor floodingMay 18, 2001: 28.80 ft, moderate floodingJun 7, 2001: 26.00 ft, minor floodingMay 8, 2002: 32.70 ft, major floodingJan 6, 2005: 27.30 ft, moderate floodingJan 14, 2005: 24.90 ft, minor floodingMay 8, 2008: 26.60 ft, minor floodingJun 27, 2008: 31.99 ft, major floodingJul 1, 2008: 30.80 ft, major floodingSep 16, 2008: 31.35 ft, major floodingMar 14, 2009: 25.60 ft, minor floodingMay 19, 2009: 24.98 ft, minor floodingOct 10, 2009: 24.85 ft, minor floodingOct 31, 2009: 28.60 ft, moderate floodingNov 18, 2009: 26.00 ft, minor floodingMar 27, 2010: 24.90 ft, minor floodingApr 4, 2010: 24.50 ft, minor floodingApr 27, 2010: 25.10 ft, minor floodingMay 17, 2010: 24.60 ft, minor floodingJun 26, 2010: 26.75 ft, minor floodingJul 11, 2010: 25.25 ft, minor floodingJul 22, 2010: 26.64 ft, minor floodingAug 1, 2010: 26.20 ft, minor floodingApr 26, 2011: 27.00 ft, moderate floodingMay 27, 2011: 24.25 ft, minor floodingJun 6, 2011: 24.50 ft, minor floodingJun 19, 2011: 27.50 ft, moderate floodingJul 1, 2011: 24.75 ft, minor floodingApr 23, 2013: 29.90 ft, moderate floodingMay 5, 2013: 28.50 ft, moderate floodingMay 22, 2013: 25.10 ft, minor floodingJun 2, 2013: 31.50 ft, major floodingJul 7, 2013: 24.90 ft, minor floodingJul 11, 2014: 29.00 ft, moderate floodingOct 3, 2014: 24.10 ft, minor floodingJun 23, 2015: 33.00 ft, major floodingJul 10, 2015: 26.00 ft, minor floodingJul 14, 2015: 24.30 ft, minor floodingDec 28, 2015: 33.50 ft, major floodingMay 1, 2017: 32.67 ft, major floodingMay 21, 2017: 25.73 ft, minor floodingJun 5, 2017: 24.08 ft, minor floodingSep 12, 2018: 24.13 ft, minor floodingOct 16, 2018: 27.88 ft, moderate floodingJan 2, 2019: 25.04 ft, minor floodingApr 1, 2019: 29.95 ft, moderate floodingJun 5, 2019: 34.14 ft, major floodingOct 19, 2019: 24.31 ft, minor floodingJan 12, 2020: 29.47 ft, moderate floodingMar 21, 2020: 24.45 ft, minor floodingMar 30, 2020: 24.38 ft, minor floodingApr 26, 2020: 24.59 ft, minor floodingMay 18, 2020: 24.71 ft, minor floodingMar 19, 2021: 26.32 ft, minor floodingApr 12, 2021: 24.29 ft, minor floodingJun 27, 2021: 31.09 ft, major floodingJul 2, 2021: 26.01 ft, minor floodingMay 7, 2022: 24.78 ft, minor floodingMay 8, 2023: 24.86 ft, minor flooding Highest, 37.40 ft, Dec 4, 1982 197019801990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Cuivre River at Old Monroe 1970s: 6 1980s: 16 1990s: 6 2000s: 16 2010s: 33 33 2020s: 11 1970s1980s1990s2000s2010s2020s
  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 88 listed crests.

Highest listed crests, Cuivre River at Old Monroe
1Dec 4, 198237.40+13.40Major—
2May 18, 197536.60+12.60Major—
3Aug 1, 199335.50+11.50Major—
4Jun 5, 201934.14+10.14Major—
5Feb 24, 198533.90+9.90Major—
6Apr 3, 197333.70+9.70Major—
7Dec 28, 201533.50+9.50Major—
8May 18, 199533.00+9.00Major—
9Jun 23, 201533.00+9.00Major—
10May 8, 200232.70+8.70Major—
11May 1, 201732.67+8.67Major—
12Apr 13, 197932.50+8.50Major—
13May 1, 198332.10+8.10Major—
14Jun 27, 200831.99+7.99Major—
15Jun 2, 201331.50+7.50Major—
16Sep 16, 200831.35+7.35Major—
17Jun 27, 202131.09+7.09Major—
18May 18, 199031.00+7.00Major—
19Oct 7, 198630.80+6.80Major—
20Jul 1, 200830.80+6.80Major—
21Apr 6, 199330.10+6.10Major—
22Apr 1, 201929.95+5.95Moderate—
23Apr 23, 201329.90+5.90Moderate—
24Jan 12, 202029.47+5.47Moderate—
25Sep 25, 197029.40+5.40Moderate—
26May 2, 197029.20+5.20Moderate—
27Jul 11, 201429.00+5.00Moderate—
28May 18, 200128.80+4.80Moderate—
29Jan 2, 198528.60+4.60Moderate—
30Oct 31, 200928.60+4.60Moderate—
31May 5, 201328.50+4.50Moderate—
32Nov 20, 198528.00+4.00Moderate—
33May 31, 199627.90+3.90Moderate—
34Oct 16, 201827.88+3.88Moderate—
35Jun 19, 201127.50+3.50Moderate—
36May 20, 198127.40+3.40Moderate—
37Jan 6, 200527.30+3.30Moderate—
38Apr 26, 201127.00+3.00Moderate—
39Jul 19, 198226.80+2.80Minor—
40Jun 26, 201026.75+2.75Minor—
41Apr 30, 199626.70+2.70Minor—
42Jul 22, 201026.64+2.64Minor—
43May 8, 200826.60+2.60Minor—
44Apr 23, 198226.53+2.53Minor—
45Mar 19, 202126.32+2.32Minor—
46Aug 1, 201026.20+2.20Minor—
47Mar 24, 198426.10+2.10Minor—
48Jul 2, 202126.01+2.01Minor—
49Feb 1, 198226.00+2.00Minor—
50Jun 7, 200126.00+2.00Minor—

The worst floods along the Cuivre River

For this gauge's highest crests, the other gauges on the Cuivre River that crested above flood stage within a week.

December 4, 1982: 37.40 ft here, major flooding

  • TroyMO · Dec 3, 1982 · 31.28 ft · Major

February 24, 1985: 33.90 ft here, major flooding

  • TroyMO · Feb 23, 1985 · 26.76 ft · Moderate

Gauges on the Cuivre River

In USGS station-number order, which runs downstream within a river basin.

Flood gauges on the Cuivre River
TroyMO21.033.40 ft, Oct 5, 194111
Old Monroe this gaugeMO24.037.40 ft, Dec 4, 198221

Other gauges in Lincoln County

Flood gauges in Lincoln County
Troy21.033.40 ft, Oct 5, 194111
Winfield Lock and Dam 2526.039.62 ft, Aug 1, 19939

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

NOAA National Water Prediction Service, gauge OMNM7, 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.