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Stillaguamish River at Arlington

Highest listed crest 21.34 ftFlood stage 14.0 ft88 crests since 1949

The Stillaguamish River at Arlington crested at major flood stage 20 times among the 88 crests the National Weather Service lists from 1949 to 2025. The highest, 21.34 ft on December 5, 2023, was major flooding, 7.34 feet above flood stage.

The gauge

Highest listed crest
21.34 ft
December 5, 2023; 82,700 cubic feet per second
Flood stage
14.0 ft
Major flooding from 19.0 ft
Crests at major
20
7th of 70 gauges in Washington
Most recent flood crest
December 9, 2025
16.85 ft, minor flooding
Location
Snohomish County
Near Arlington (2.4 mi), Marysville (8.6 mi), Lake Stevens (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, Stillaguamish River at Arlington
Action stage12.50—The level at which the NWS or its partners begin to take action
Flood stage (minor)14.050Dec 9, 2025Minimal or no property damage, but possibly some public threat
Moderate flood stage17.518Oct 22, 2019Some inundation of structures and roads near the stream
Major flood stage19.020Dec 5, 2023Extensive inundation of structures and roads

Every listed crest

88 crests from 1949 to 2025. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Stillaguamish River at Arlington, 1949 to 2025 1416182022ft Flood stage 14.0 ftMajor 19.0 ft Dec 28, 1949: 17.90 ft, moderate flooding; 47,300 cubic feet per secondFeb 10, 1951: 19.10 ft, major flooding; 64,000 cubic feet per secondJan 31, 1953: 16.92 ft, minor floodingOct 25, 1955: 18.00 ft, moderate flooding; 43,500 cubic feet per secondDec 9, 1956: 18.00 ft, moderate flooding; 43,500 cubic feet per secondNov 12, 1958: 19.74 ft, major floodingApr 30, 1959: 18.10 ft, moderate floodingNov 20, 1959: 19.10 ft, major floodingDec 15, 1959: 19.35 ft, major floodingFeb 21, 1961: 19.82 ft, major floodingJan 4, 1969: 17.03 ft, minor floodingDec 2, 1975: 18.75 ft, moderate floodingDec 26, 1980: 19.45 ft, major flooding; 61,300 cubic feet per secondJan 24, 1982: 18.25 ft, moderate floodingFeb 14, 1982: 17.50 ft, moderate floodingDec 3, 1982: 18.85 ft, moderate floodingJan 10, 1983: 18.00 ft, moderate floodingJan 25, 1984: 18.52 ft, moderate floodingJan 19, 1986: 19.27 ft, major floodingFeb 24, 1986: 17.75 ft, moderate floodingNov 23, 1986: 19.05 ft, major floodingOct 16, 1988: 16.50 ft, minor floodingNov 9, 1989: 16.55 ft, minor floodingDec 4, 1989: 16.75 ft, minor floodingNov 10, 1990: 19.35 ft, major floodingNov 24, 1990: 19.95 ft, major flooding; 64,400 cubic feet per secondNov 30, 1994: 16.10 ft, minor floodingNov 8, 1995: 18.00 ft, moderate floodingNov 29, 1995: 18.35 ft, moderate floodingFeb 8, 1996: 18.80 ft, moderate floodingMar 19, 1997: 18.30 ft, moderate floodingOct 30, 1997: 16.60 ft, minor floodingDec 29, 1998: 16.05 ft, minor floodingDec 15, 1999: 17.10 ft, minor floodingJan 8, 2002: 16.85 ft, minor flooding; 56,730 cubic feet per secondFeb 23, 2002: 19.40 ft, major flooding; 71,120 cubic feet per secondJan 26, 2003: 14.10 ft, minor flooding; 41,900 cubic feet per secondMar 13, 2003: 14.35 ft, minor flooding; 42,900 cubic feet per secondOct 17, 2003: 16.45 ft, minor flooding; 53,750 cubic feet per secondOct 21, 2003: 20.75 ft, major flooding; 79,200 cubic feet per secondNov 19, 2003: 17.75 ft, moderate flooding; 61,400 cubic feet per secondNov 25, 2004: 18.66 ft, moderate flooding; 66,760 cubic feet per secondDec 11, 2004: 17.48 ft, minor flooding; 59,820 cubic feet per secondJan 18, 2005: 16.38 ft, minor flooding; 53,399 cubic feet per secondNov 6, 2006: 21.06 ft, major flooding; 81,060 cubic feet per secondJan 2, 2007: 15.64 ft, minor flooding; 49,700 cubic feet per secondMar 12, 2007: 14.50 ft, minor flooding; 43,500 cubic feet per secondMar 24, 2007: 16.98 ft, minor flooding; 57,743 cubic feet per secondDec 3, 2007: 15.18 ft, minor flooding; 47,400 cubic feet per secondNov 7, 2008: 15.76 ft, minor flooding; 50,300 cubic feet per secondNov 12, 2008: 16.38 ft, minor flooding; 53,399 cubic feet per secondJan 8, 2009: 20.82 ft, major flooding; 79,620 cubic feet per secondNov 16, 2009: 14.88 ft, minor floodingNov 26, 2009: 14.56 ft, minor floodingDec 12, 2010: 21.29 ft, major flooding; 82,400 cubic feet per secondMar 31, 2011: 15.92 ft, minor flooding; 51,100 cubic feet per secondNov 23, 2011: 16.64 ft, minor flooding; 55,091 cubic feet per secondFeb 22, 2012: 14.66 ft, minor flooding; 44,460 cubic feet per secondJan 9, 2013: 14.56 ft, minor flooding; 43,860 cubic feet per secondJan 11, 2014: 14.16 ft, minor flooding; 42,140 cubic feet per secondMar 9, 2014: 14.64 ft, minor flooding; 44,340 cubic feet per secondNov 4, 2014: 14.80 ft, minor flooding; 45,300 cubic feet per secondNov 28, 2014: 14.28 ft, minor flooding; 42,620 cubic feet per secondJan 5, 2015: 17.48 ft, minor flooding; 59,820 cubic feet per secondOct 31, 2015: 15.54 ft, minor flooding; 49,200 cubic feet per secondNov 13, 2015: 19.44 ft, major flooding; 71,352 cubic feet per secondNov 17, 2015: 20.50 ft, major flooding; 77,700 cubic feet per secondDec 8, 2015: 16.56 ft, minor flooding; 54,468 cubic feet per secondOct 22, 2017: 14.30 ft, minor flooding; 42,700 cubic feet per secondNov 22, 2017: 19.05 ft, major flooding; 69,090 cubic feet per secondOct 22, 2019: 17.86 ft, moderate flooding; 62,060 cubic feet per secondDec 21, 2019: 15.82 ft, minor flooding; 50,600 cubic feet per secondJan 7, 2020: 16.92 ft, minor flooding; 57,276 cubic feet per secondJan 24, 2020: 14.48 ft, minor flooding; 43,420 cubic feet per secondFeb 1, 2020: 19.44 ft, major flooding; 71,352 cubic feet per secondDec 21, 2020: 15.46 ft, minor flooding; 48,800 cubic feet per secondJan 13, 2021: 15.12 ft, minor flooding; 47,100 cubic feet per secondOct 29, 2021: 16.34 ft, minor flooding; 53,200 cubic feet per secondNov 12, 2021: 14.80 ft, minor flooding; 45,300 cubic feet per secondNov 16, 2021: 15.26 ft, minor flooding; 47,800 cubic feet per secondNov 29, 2021: 14.62 ft, minor flooding; 44,220 cubic feet per secondJan 12, 2022: 15.86 ft, minor flooding; 50,800 cubic feet per secondMar 1, 2022: 16.70 ft, minor flooding; 55,560 cubic feet per secondNov 5, 2022: 17.04 ft, minor flooding; 58,100 cubic feet per secondDec 25, 2022: 15.82 ft, minor flooding; 50,600 cubic feet per secondDec 5, 2023: 21.34 ft, major flooding; 82,700 cubic feet per secondJan 28, 2024: 15.30 ft, minor flooding; 48,000 cubic feet per secondDec 9, 2025: 16.85 ft, minor flooding; 45,933 cubic feet per second Highest, 21.34 ft, Dec 5, 2023 19501960197019801990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Stillaguamish River at Arlington 1940s: 1 1950s: 8 1960s: 2 1970s: 1 1980s: 12 1990s: 10 2000s: 20 20 2010s: 18 2020s: 16 1940s1950s1960s1970s1980s1990s2000s2010s2020s
  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, Stillaguamish River at Arlington
1Dec 5, 202321.34+7.34Major82,700
2Dec 12, 201021.29+7.29Major82,400
3Nov 6, 200621.06+7.06Major81,060
4Jan 8, 200920.82+6.82Major79,620
5Oct 21, 200320.75+6.75Major79,200
6Nov 17, 201520.50+6.50Major77,700
7Nov 24, 199019.95+5.95Major64,400
8Feb 21, 196119.82+5.82Major—
9Nov 12, 195819.74+5.74Major—
10Dec 26, 198019.45+5.45Major61,300
11Nov 13, 201519.44+5.44Major71,352
12Feb 1, 202019.44+5.44Major71,352
13Feb 23, 200219.40+5.40Major71,120
14Dec 15, 195919.35+5.35Major—
15Nov 10, 199019.35+5.35Major—
16Jan 19, 198619.27+5.27Major—
17Feb 10, 195119.10+5.10Major64,000
18Nov 20, 195919.10+5.10Major—
19Nov 23, 198619.05+5.05Major—
20Nov 22, 201719.05+5.05Major69,090
21Dec 3, 198218.85+4.85Moderate—
22Feb 8, 199618.80+4.80Moderate—
23Dec 2, 197518.75+4.75Moderate—
24Nov 25, 200418.66+4.66Moderate66,760
25Jan 25, 198418.52+4.52Moderate—
26Nov 29, 199518.35+4.35Moderate—
27Mar 19, 199718.30+4.30Moderate—
28Jan 24, 198218.25+4.25Moderate—
29Apr 30, 195918.10+4.10Moderate—
30Oct 25, 195518.00+4.00Moderate43,500
31Dec 9, 195618.00+4.00Moderate43,500
32Jan 10, 198318.00+4.00Moderate—
33Nov 8, 199518.00+4.00Moderate—
34Dec 28, 194917.90+3.90Moderate47,300
35Oct 22, 201917.86+3.86Moderate62,060
36Feb 24, 198617.75+3.75Moderate—
37Nov 19, 200317.75+3.75Moderate61,400
38Feb 14, 198217.50+3.50Moderate—
39Dec 11, 200417.48+3.48Minor59,820
40Jan 5, 201517.48+3.48Minor59,820
41Dec 15, 199917.10+3.10Minor—
42Nov 5, 202217.04+3.04Minor58,100
43Jan 4, 196917.03+3.03Minor—
44Mar 24, 200716.98+2.98Minor57,743
45Jan 31, 195316.92+2.92Minor—
46Jan 7, 202016.92+2.92Minor57,276
47Jan 8, 200216.85+2.85Minor56,730
48Dec 9, 202516.85+2.85Minor45,933
49Dec 4, 198916.75+2.75Minor—
50Mar 1, 202216.70+2.70Minor55,560

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
Monroe15.025.30 ft, Nov 25, 199030
Jordan Rd. Bridge211.0211.69 ft, Dec 9, 20250

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

NOAA National Water Prediction Service, gauge ARLW1, 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.