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Snohomish River near Monroe

Highest listed crest 25.30 ftFlood stage 15.0 ft91 crests since 1964

The Snohomish River near Monroe crested at major flood stage 30 times among the 91 crests the National Weather Service lists from 1964 to 2025. The highest, 25.30 ft on November 25, 1990, was major flooding, 10.30 feet above flood stage. 1 other gauge on the Snohomish River crested above flood stage within a week of it.

The gauge

Highest listed crest
25.30 ft
November 25, 1990; 150,000 cubic feet per second
Flood stage
15.0 ft
Major flooding from 17.0 ft
Crests at major
30
3rd of 70 gauges in Washington
Most recent flood crest
December 17, 2025
16.18 ft, moderate flooding
Location
Snohomish County
Near Monroe (3.5 mi), Woodinville (6.9 mi), Snohomish (7.1 mi)

Flood stages

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

Flood categories, Snohomish River near Monroe
Action stage10.017Mar 9, 2014The level at which the NWS or its partners begin to take action
Flood stage (minor)15.019Nov 5, 2022Minimal or no property damage, but possibly some public threat
Moderate flood stage16.025Dec 17, 2025Some inundation of structures and roads near the stream
Major flood stage17.030Dec 12, 2025Extensive inundation of structures and roads

Every listed crest

91 crests from 1964 to 2025. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Snohomish River near Monroe, 1964 to 2025 1015202530ft Flood stage 15.0 ftMajor 17.0 ft Dec 2, 1964: 15.95 ft, minor flooding; 59,600 cubic feet per secondJan 30, 1965: 17.53 ft, major flooding; 67,800 cubic feet per secondDec 13, 1966: 14.94 ft, action stage; 54,900 cubic feet per secondOct 28, 1967: 14.69 ft, action stage; 55,400 cubic feet per secondDec 26, 1967: 17.68 ft, major flooding; 73,100 cubic feet per secondJan 21, 1968: 17.10 ft, major flooding; 69,600 cubic feet per secondJun 2, 1968: 15.07 ft, minor flooding; 56,800 cubic feet per secondJan 5, 1969: 17.52 ft, major flooding; 72,100 cubic feet per secondJan 19, 1971: 15.55 ft, minor flooding; 60,300 cubic feet per secondNov 4, 1971: 16.27 ft, moderate flooding; 64,600 cubic feet per secondFeb 28, 1972: 16.88 ft, moderate flooding; 68,300 cubic feet per secondMar 6, 1972: 16.54 ft, moderate flooding; 66,200 cubic feet per secondDec 26, 1972: 15.71 ft, minor flooding; 61,300 cubic feet per secondJan 17, 1974: 17.59 ft, major flooding; 72,500 cubic feet per secondDec 21, 1974: 16.10 ft, moderate flooding; 63,600 cubic feet per secondJan 18, 1975: 16.79 ft, moderate flooding; 67,700 cubic feet per secondDec 4, 1975: 22.92 ft, major flooding; 115,000 cubic feet per secondJan 16, 1976: 14.15 ft, action stage; 52,800 cubic feet per secondJan 18, 1977: 15.23 ft, minor flooding; 58,200 cubic feet per secondNov 2, 1977: 14.56 ft, action stage; 54,800 cubic feet per secondNov 26, 1977: 16.11 ft, moderate flooding; 62,600 cubic feet per secondDec 3, 1977: 19.74 ft, major flooding; 83,200 cubic feet per secondDec 18, 1979: 18.48 ft, major flooding; 74,900 cubic feet per secondNov 20, 1980: 14.41 ft, action stage; 54,000 cubic feet per secondDec 26, 1980: 19.60 ft, major flooding; 82,200 cubic feet per secondFeb 16, 1981: 15.35 ft, minor flooding; 58,800 cubic feet per secondJan 24, 1982: 17.35 ft, major flooding; 68,800 cubic feet per secondFeb 16, 1982: 18.00 ft, major flooding; 72,000 cubic feet per secondFeb 21, 1982: 14.32 ft, action stage; 53,600 cubic feet per secondDec 4, 1982: 17.38 ft, major flooding; 68,900 cubic feet per secondJan 8, 1983: 16.66 ft, moderate flooding; 65,300 cubic feet per secondJan 5, 1984: 16.23 ft, moderate flooding; 63,200 cubic feet per secondJan 25, 1984: 16.96 ft, moderate flooding; 66,800 cubic feet per secondOct 25, 1985: 15.36 ft, minor flooding; 58,800 cubic feet per secondNov 3, 1985: 16.46 ft, moderate flooding; 64,300 cubic feet per secondJan 19, 1986: 16.41 ft, moderate flooding; 64,000 cubic feet per secondFeb 24, 1986: 15.94 ft, minor flooding; 61,700 cubic feet per secondNov 24, 1986: 20.68 ft, major flooding; 90,600 cubic feet per secondOct 16, 1988: 16.70 ft, moderate flooding; 65,500 cubic feet per secondNov 9, 1989: 15.95 ft, minor flooding; 61,700 cubic feet per secondDec 5, 1989: 17.68 ft, major flooding; 70,400 cubic feet per secondJan 10, 1990: 17.10 ft, major flooding; 67,500 cubic feet per secondNov 10, 1990: 21.65 ft, major flooding; 100,000 cubic feet per secondNov 25, 1990: 25.30 ft, major flooding; 150,000 cubic feet per secondFeb 20, 1991: 16.21 ft, moderate flooding; 63,000 cubic feet per secondJan 25, 1993: 14.27 ft, action stage; 52,700 cubic feet per secondFeb 1, 1995: 14.86 ft, action stage; 55,600 cubic feet per secondFeb 19, 1995: 15.66 ft, minor flooding; 59,700 cubic feet per secondNov 9, 1995: 18.72 ft, major flooding; 76,300 cubic feet per secondNov 30, 1995: 24.10 ft, major flooding; 132,000 cubic feet per secondFeb 9, 1996: 21.53 ft, major flooding; 98,800 cubic feet per secondMar 20, 1997: 16.84 ft, moderate flooding; 65,800 cubic feet per secondOct 30, 1997: 14.23 ft, action stage; 52,500 cubic feet per secondDec 30, 1998: 16.56 ft, moderate flooding; 64,300 cubic feet per secondNov 12, 1999: 14.90 ft, action stage; 55,800 cubic feet per secondDec 16, 1999: 15.98 ft, minor flooding; 61,300 cubic feet per secondJan 8, 2002: 15.33 ft, minor flooding; 59,300 cubic feet per secondJan 26, 2003: 14.07 ft, action stage; 53,100 cubic feet per secondOct 21, 2003: 17.06 ft, major flooding; 67,900 cubic feet per secondNov 19, 2003: 16.34 ft, moderate flooding; 64,300 cubic feet per secondNov 25, 2004: 14.30 ft, action stage; 54,200 cubic feet per secondDec 11, 2004: 17.17 ft, major flooding; 68,500 cubic feet per secondJan 19, 2005: 17.44 ft, major flooding; 69,900 cubic feet per secondNov 7, 2006: 23.54 ft, major flooding; 124,000 cubic feet per secondMar 12, 2007: 14.17 ft, action stage; 53,600 cubic feet per secondMar 25, 2007: 15.72 ft, minor flooding; 61,200 cubic feet per secondDec 3, 2007: 16.32 ft, moderate flooding; 64,200 cubic feet per secondNov 7, 2008: 15.40 ft, minor flooding; 59,600 cubic feet per secondNov 13, 2008: 17.89 ft, major flooding; 72,200 cubic feet per secondJan 8, 2009: 24.12 ft, major flooding; 132,000 cubic feet per secondNov 17, 2009: 11.42 ft, action stage; 40,600 cubic feet per secondJan 17, 2011: 19.24 ft, major flooding; 79,800 cubic feet per secondFeb 22, 2012: 13.32 ft, action stage; 49,500 cubic feet per secondApr 6, 2013: 10.59 ft, action stage; 36,700 cubic feet per secondMar 9, 2014: 14.15 ft, action stage; 53,500 cubic feet per secondNov 28, 2014: 16.58 ft, moderate flooding; 65,500 cubic feet per secondJan 5, 2015: 15.72 ft, minor flooding; 61,200 cubic feet per secondNov 1, 2015: 15.97 ft, minor flooding; 63,422 cubic feet per secondNov 14, 2015: 16.54 ft, moderate flooding; 66,462 cubic feet per secondNov 18, 2015: 18.70 ft, major flooding; 78,200 cubic feet per secondDec 9, 2015: 16.68 ft, moderate flooding; 67,215 cubic feet per secondNov 23, 2017: 16.59 ft, moderate flooding; 66,694 cubic feet per secondFeb 2, 2020: 18.41 ft, major flooding; 76,581 cubic feet per secondFeb 8, 2020: 16.64 ft, moderate flooding; 66,961 cubic feet per secondOct 29, 2021: 15.01 ft, minor flooding; 57,584 cubic feet per secondNov 15, 2021: 16.60 ft, moderate flooding; 66,120 cubic feet per secondMar 1, 2022: 15.07 ft, minor flooding; 57,900 cubic feet per secondNov 5, 2022: 15.00 ft, minor flooding; 58,000 cubic feet per secondDec 6, 2023: 16.38 ft, moderate flooding; 64,919 cubic feet per secondDec 12, 2025: 24.55 ft, major flooding; 106,222 cubic feet per secondDec 17, 2025: 16.18 ft, moderate flooding; 63,765 cubic feet per second Highest, 25.30 ft, Nov 25, 1990 197019801990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Snohomish River near Monroe 1960s: 6 1970s: 13 1980s: 16 16 1990s: 11 2000s: 11 2010s: 8 2020s: 9 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 91 listed crests.

Highest listed crests, Snohomish River near Monroe
1Nov 25, 199025.30+10.30Major150,000
2Dec 12, 202524.55+9.55Major106,222
3Jan 8, 200924.12+9.12Major132,000
4Nov 30, 199524.10+9.10Major132,000
5Nov 7, 200623.54+8.54Major124,000
6Dec 4, 197522.92+7.92Major115,000
7Nov 10, 199021.65+6.65Major100,000
8Feb 9, 199621.53+6.53Major98,800
9Nov 24, 198620.68+5.68Major90,600
10Dec 3, 197719.74+4.74Major83,200
11Dec 26, 198019.60+4.60Major82,200
12Jan 17, 201119.24+4.24Major79,800
13Nov 9, 199518.72+3.72Major76,300
14Nov 18, 201518.70+3.70Major78,200
15Dec 18, 197918.48+3.48Major74,900
16Feb 2, 202018.41+3.41Major76,581
17Feb 16, 198218.00+3.00Major72,000
18Nov 13, 200817.89+2.89Major72,200
19Dec 26, 196717.68+2.68Major73,100
20Dec 5, 198917.68+2.68Major70,400
21Jan 17, 197417.59+2.59Major72,500
22Jan 30, 196517.53+2.53Major67,800
23Jan 5, 196917.52+2.52Major72,100
24Jan 19, 200517.44+2.44Major69,900
25Dec 4, 198217.38+2.38Major68,900
26Jan 24, 198217.35+2.35Major68,800
27Dec 11, 200417.17+2.17Major68,500
28Jan 21, 196817.10+2.10Major69,600
29Jan 10, 199017.10+2.10Major67,500
30Oct 21, 200317.06+2.06Major67,900
31Jan 25, 198416.96+1.96Moderate66,800
32Feb 28, 197216.88+1.88Moderate68,300
33Mar 20, 199716.84+1.84Moderate65,800
34Jan 18, 197516.79+1.79Moderate67,700
35Oct 16, 198816.70+1.70Moderate65,500
36Dec 9, 201516.68+1.68Moderate67,215
37Jan 8, 198316.66+1.66Moderate65,300
38Feb 8, 202016.64+1.64Moderate66,961
39Nov 15, 202116.60+1.60Moderate66,120
40Nov 23, 201716.59+1.59Moderate66,694
41Nov 28, 201416.58+1.58Moderate65,500
42Dec 30, 199816.56+1.56Moderate64,300
43Mar 6, 197216.54+1.54Moderate66,200
44Nov 14, 201516.54+1.54Moderate66,462
45Nov 3, 198516.46+1.46Moderate64,300
46Jan 19, 198616.41+1.41Moderate64,000
47Dec 6, 202316.38+1.38Moderate64,919
48Nov 19, 200316.34+1.34Moderate64,300
49Dec 3, 200716.32+1.32Moderate64,200
50Nov 4, 197116.27+1.27Moderate64,600

The worst floods along the Snohomish River

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

November 25, 1990: 25.30 ft here, major flooding

  • SnohomishWA · Nov 25, 1990 · 33.50 ft · Major

December 12, 2025: 24.55 ft here, major flooding

  • SnohomishWA · Dec 11, 2025 · 34.15 ft · Major · its highest

January 8, 2009: 24.12 ft here, major flooding

  • SnohomishWA · Jan 8, 2009 · 33.47 ft · Major

Gauges on the Snohomish River

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

Flood gauges on the Snohomish River
Monroe this gaugeWA15.025.30 ft, Nov 25, 199030
SnohomishWA25.034.15 ft, Dec 11, 202530

Other gauges in Snohomish County

Flood gauges in Snohomish County
Arlington13.015.59 ft, Dec 12, 20105
Snohomish18.020.39 ft, Jan 8, 20090
Gold Bar15.024.51 ft, Nov 6, 200624
Snohomish25.034.15 ft, Dec 11, 202530
Jordan Rd. Bridge211.0211.69 ft, Dec 9, 20250
Arlington14.021.34 ft, Dec 5, 202320

Snohomish County: every hazard · River floods across the country · Washington

NOAA National Water Prediction Service, gauge MROW1, 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.