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Little Sac River near Morrisville

Highest listed crest 25.54 ftFlood stage 14.0 ft56 crests since 1969

The Little Sac River near Morrisville crested at major flood stage 1 time among the 56 crests the National Weather Service lists from 1969 to 2022. The highest, 25.54 ft on August 20, 2007, was major flooding, 11.54 feet above flood stage.

The gauge

Highest listed crest
25.54 ft
August 20, 2007; 33,700 cubic feet per second
Flood stage
14.0 ft
Major flooding from 25.0 ft
Crests at major
1
94th of 173 gauges in Missouri
Most recent flood crest
May 5, 2022
21.65 ft, moderate flooding
Location
Polk County
Near Bolivar (9.4 mi)

Flood stages

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

Flood categories, Little Sac River near Morrisville
Action stage12.06Jun 16, 2009The level at which the NWS or its partners begin to take action
Flood stage (minor)14.019May 18, 2021Minimal or no property damage, but possibly some public threat
Moderate flood stage17.023May 5, 2022Some inundation of structures and roads near the stream
Major flood stage25.01Aug 20, 2007Extensive inundation of structures and roads

Every listed crest

56 crests from 1969 to 2022. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Little Sac River near Morrisville, 1969 to 2022 51015202530ft Flood stage 14.0 ftMajor 25.0 ft Jan 29, 1969: 13.12 ft, action stageApr 30, 1970: 17.05 ft, moderate flooding; 11,300 cubic feet per secondMay 23, 1971: 9.05 ft, below flood stageApr 21, 1972: 16.81 ft, minor flooding; 10,900 cubic feet per secondNov 1, 1972: 21.95 ft, moderate flooding; 22,300 cubic feet per secondMar 10, 1974: 17.08 ft, moderate flooding; 11,300 cubic feet per secondNov 4, 1974: 15.62 ft, minor flooding; 9,050 cubic feet per secondApr 20, 1976: 13.55 ft, action stageSep 27, 1977: 15.12 ft, minor flooding; 8,360 cubic feet per secondMar 24, 1978: 14.55 ft, minor flooding; 7,650 cubic feet per secondJul 1, 1979: 15.63 ft, minor flooding; 9,070 cubic feet per secondMar 30, 1980: 11.46 ft, below flood stageJun 20, 1981: 18.59 ft, moderate flooding; 14,200 cubic feet per secondJan 30, 1982: 12.86 ft, action stageApr 2, 1983: 15.85 ft, minor flooding; 9,380 cubic feet per secondApr 21, 1984: 16.45 ft, minor flooding; 10,300 cubic feet per secondFeb 23, 1985: 19.94 ft, moderate flooding; 16,900 cubic feet per secondNov 19, 1985: 16.79 ft, minor flooding; 10,900 cubic feet per secondOct 1, 1986: 21.29 ft, moderate flooding; 20,300 cubic feet per secondNov 24, 1987: 21.91 ft, moderate flooding; 22,200 cubic feet per secondMay 22, 1989: 18.04 ft, moderate flooding; 13,600 cubic feet per secondMar 15, 1990: 18.28 ft, moderate flooding; 13,600 cubic feet per secondMay 14, 1991: 17.17 ft, moderate flooding; 11,400 cubic feet per secondJun 9, 1992: 13.07 ft, action stageSep 25, 1993: 23.33 ft, moderate flooding; 29,100 cubic feet per secondApr 12, 1994: 18.81 ft, moderate flooding; 14,400 cubic feet per secondJun 10, 1995: 20.65 ft, moderate flooding; 19,100 cubic feet per secondSep 26, 1996: 16.39 ft, minor flooding; 9,810 cubic feet per secondNov 7, 1996: 16.01 ft, minor flooding; 9,220 cubic feet per secondMar 19, 1998: 14.26 ft, minor floodingMay 4, 1999: 17.84 ft, moderate flooding; 12,600 cubic feet per secondJul 12, 2000: 12.85 ft, action stageFeb 24, 2001: 14.73 ft, minor floodingMay 8, 2002: 17.03 ft, moderate flooding; 10,600 cubic feet per secondMay 1, 2003: 6.83 ft, below flood stageMar 5, 2004: 11.47 ft, below flood stageJan 5, 2005: 19.18 ft, moderate flooding; 15,300 cubic feet per secondMay 10, 2006: 11.68 ft, below flood stageAug 20, 2007: 25.54 ft, major flooding; 33,700 cubic feet per secondJun 28, 2008: 19.98 ft, moderate flooding; 16,800 cubic feet per secondJun 16, 2009: 12.17 ft, action stageOct 9, 2009: 16.73 ft, minor flooding; 10,200 cubic feet per secondApr 26, 2011: 17.49 ft, moderate flooding; 11,100 cubic feet per secondApr 15, 2012: 7.44 ft, below flood stageJun 1, 2013: 14.25 ft, minor flooding; 7,950 cubic feet per secondJun 5, 2014: 8.72 ft, below flood stageJul 2, 2015: 16.83 ft, minor flooding; 12,000 cubic feet per secondDec 27, 2015: 23.61 ft, moderate flooding; 28,600 cubic feet per secondApr 30, 2017: 20.69 ft, moderate flooding; 20,400 cubic feet per secondFeb 24, 2018: 16.15 ft, minor flooding; 9,900 cubic feet per secondMay 23, 2019: 22.76 ft, moderate flooding; 25,000 cubic feet per secondJan 11, 2020: 17.17 ft, moderate flooding; 12,664 cubic feet per secondMar 19, 2020: 14.14 ft, minor flooding; 7,828 cubic feet per secondMar 13, 2021: 16.68 ft, minor flooding; 10,300 cubic feet per secondMay 18, 2021: 15.29 ft, minor flooding; 9,578 cubic feet per secondMay 5, 2022: 21.65 ft, moderate flooding; 22,997 cubic feet per second Highest, 25.54 ft, Aug 20, 2007 197019801990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Little Sac River near Morrisville 1960s: 0 1970s: 8 1980s: 8 1990s: 9 9 2000s: 6 2010s: 7 2020s: 5 1960s1970s1980s1990s2000s2010s2020s
  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 56 listed crests.

Highest listed crests, Little Sac River near Morrisville
1Aug 20, 200725.54+11.54Major33,700
2Dec 27, 201523.61+9.61Moderate28,600
3Sep 25, 199323.33+9.33Moderate29,100
4May 23, 201922.76+8.76Moderate25,000
5Nov 1, 197221.95+7.95Moderate22,300
6Nov 24, 198721.91+7.91Moderate22,200
7May 5, 202221.65+7.65Moderate22,997
8Oct 1, 198621.29+7.29Moderate20,300
9Apr 30, 201720.69+6.69Moderate20,400
10Jun 10, 199520.65+6.65Moderate19,100
11Jun 28, 200819.98+5.98Moderate16,800
12Feb 23, 198519.94+5.94Moderate16,900
13Jan 5, 200519.18+5.18Moderate15,300
14Apr 12, 199418.81+4.81Moderate14,400
15Jun 20, 198118.59+4.59Moderate14,200
16Mar 15, 199018.28+4.28Moderate13,600
17May 22, 198918.04+4.04Moderate13,600
18May 4, 199917.84+3.84Moderate12,600
19Apr 26, 201117.49+3.49Moderate11,100
20May 14, 199117.17+3.17Moderate11,400
21Jan 11, 202017.17+3.17Moderate12,664
22Mar 10, 197417.08+3.08Moderate11,300
23Apr 30, 197017.05+3.05Moderate11,300
24May 8, 200217.03+3.03Moderate10,600
25Jul 2, 201516.83+2.83Minor12,000
26Apr 21, 197216.81+2.81Minor10,900
27Nov 19, 198516.79+2.79Minor10,900
28Oct 9, 200916.73+2.73Minor10,200
29Mar 13, 202116.68+2.68Minor10,300
30Apr 21, 198416.45+2.45Minor10,300
31Sep 26, 199616.39+2.39Minor9,810
32Feb 24, 201816.15+2.15Minor9,900
33Nov 7, 199616.01+2.01Minor9,220
34Apr 2, 198315.85+1.85Minor9,380
35Jul 1, 197915.63+1.63Minor9,070
36Nov 4, 197415.62+1.62Minor9,050
37May 18, 202115.29+1.29Minor9,578
38Sep 27, 197715.12+1.12Minor8,360
39Feb 24, 200114.73+0.73Minor—
40Mar 24, 197814.55+0.55Minor7,650
41Mar 19, 199814.26+0.26Minor—
42Jun 1, 201314.25+0.25Minor7,950
43Mar 19, 202014.14+0.14Minor7,828
44Apr 20, 197613.55−0.45Action—
45Jan 29, 196913.12−0.88Action—
46Jun 9, 199213.07−0.93Action—
47Jan 30, 198212.86−1.14Action—
48Jul 12, 200012.85−1.15Action—
49Jun 16, 200912.17−1.83Action—
50May 10, 200611.68−2.32Below flood stage—

Other gauges in Polk County

Flood gauges in Polk County
Polk17.025.20 ft, Sep 14, 19140
Polk17.027.81 ft, Dec 27, 20152

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

NOAA National Water Prediction Service, gauge MSZM7, 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.