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Yaak River near Troy

Highest listed crest 11.10 ftFlood stage 8.0 ft46 crests since 1948

The Yaak River near Troy crested at major flood stage 1 time among the 46 crests the National Weather Service lists from 1948 to 2025. The highest, 11.10 ft on May 27, 1948, was major flooding, 3.10 feet above flood stage.

The gauge

Highest listed crest
11.10 ft
May 27, 1948; 12,500 cubic feet per second
Flood stage
8.0 ft
Major flooding from 10.0 ft
Crests at major
1
28th of 93 gauges in Montana
Most recent flood crest
December 11, 2025
8.30 ft, minor flooding
Location
Lincoln County
Montana

Flood stages

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

Flood categories, Yaak River near Troy
Action stage7.516Dec 17, 2025The level at which the NWS or its partners begin to take action
Flood stage (minor)8.024Dec 11, 2025Minimal or no property damage, but possibly some public threat
Moderate flood stage9.03May 17, 1997Some inundation of structures and roads near the stream
Major flood stage10.01May 27, 1948Extensive inundation of structures and roads

Every listed crest

46 crests from 1948 to 2025. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Yaak River near Troy, 1948 to 2025 681012ft Flood stage 8.0 ftMajor 10.0 ft May 27, 1948: 11.10 ft, major flooding; 12,500 cubic feet per secondMay 21, 1956: 9.70 ft, moderate flooding; 9,356 cubic feet per secondMay 6, 1957: 8.46 ft, minor flooding; 7,930 cubic feet per secondMay 12, 1960: 8.26 ft, minor flooding; 7,680 cubic feet per secondMay 27, 1961: 8.93 ft, minor flooding; 10,220 cubic feet per secondMay 20, 1964: 8.50 ft, minor flooding; 8,400 cubic feet per secondApr 30, 1965: 7.97 ft, action stage; 6,750 cubic feet per secondMay 7, 1966: 8.20 ft, minor flooding; 7,440 cubic feet per secondMay 22, 1967: 9.07 ft, moderate flooding; 10,620 cubic feet per secondMay 13, 1969: 8.35 ft, minor flooding; 8,130 cubic feet per secondMay 18, 1970: 7.58 ft, action stage; 5,760 cubic feet per secondMay 13, 1971: 8.61 ft, minor flooding; 9,220 cubic feet per secondMay 16, 1972: 8.56 ft, minor flooding; 8,870 cubic feet per secondMay 17, 1973: 7.63 ft, action stage; 5,900 cubic feet per secondJan 17, 1974: 8.79 ft, minor flooding; 9,679 cubic feet per secondMay 16, 1975: 8.03 ft, minor flooding; 7,080 cubic feet per secondMay 11, 1976: 8.96 ft, minor flooding; 10,260 cubic feet per secondMay 16, 1978: 7.67 ft, action stage; 6,010 cubic feet per secondApr 29, 1980: 8.01 ft, minor flooding; 6,990 cubic feet per secondMay 1, 1981: 7.56 ft, action stage; 5,710 cubic feet per secondMay 26, 1982: 8.10 ft, minor flooding; 7,280 cubic feet per secondMay 26, 1983: 7.79 ft, action stage; 6,350 cubic feet per secondMay 1, 1987: 7.80 ft, action stage; 6,490 cubic feet per secondApr 7, 1988: 7.80 ft, action stage; 6,490 cubic feet per secondMay 8, 1989: 7.69 ft, action stage; 6,060 cubic feet per secondNov 25, 1990: 8.21 ft, minor flooding; 7,620 cubic feet per secondApr 5, 1991: 8.50 ft, minor flooding; 8,800 cubic feet per secondNov 30, 1995: 8.07 ft, minor flooding; 7,200 cubic feet per secondFeb 9, 1996: 7.96 ft, action stageMay 16, 1996: 8.33 ft, minor flooding; 7,970 cubic feet per secondMay 17, 1997: 9.58 ft, moderate flooding; 12,600 cubic feet per secondMay 27, 1998: 8.16 ft, minor flooding; 7,490 cubic feet per secondMay 26, 1999: 8.59 ft, minor flooding; 8,900 cubic feet per secondApr 15, 2002: 8.59 ft, minor flooding; 8,900 cubic feet per secondMar 25, 2007: 7.92 ft, action stage; 6,660 cubic feet per secondMay 21, 2008: 8.53 ft, minor flooding; 8,700 cubic feet per secondMay 16, 2011: 8.23 ft, minor flooding; 7,660 cubic feet per secondApr 27, 2012: 8.52 ft, minor flooding; 8,670 cubic feet per secondMay 14, 2013: 7.94 ft, action stage; 6,720 cubic feet per secondMar 16, 2015: 7.90 ft, action stage; 6,600 cubic feet per secondMay 7, 2017: 7.63 ft, action stage; 6,170 cubic feet per secondMay 21, 2020: 7.79 ft, action stage; 6,490 cubic feet per secondMay 26, 2021: 6.37 ft, below flood stage; 3,720 cubic feet per secondMay 4, 2025: 6.23 ft, below flood stage; 2,840 cubic feet per secondDec 11, 2025: 8.30 ft, minor flooding; 7,940 cubic feet per secondDec 17, 2025: 7.94 ft, action stage; 6,790 cubic feet per second Highest, 11.10 ft, May 27, 1948 19501960197019801990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Yaak River near Troy 1940s: 1 1950s: 2 1960s: 6 1970s: 5 1980s: 2 1990s: 7 7 2000s: 2 2010s: 2 2020s: 1 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.
  3. 1 crest measured on an earlier gauge datum is left out: 11.40 ft on May 20, 1954.

Highest crests

Highest listed crests, Yaak River near Troy
1May 27, 194811.10+3.10Major12,500
2May 21, 19569.70+1.70Moderate9,356
3May 17, 19979.58+1.58Moderate12,600
4May 22, 19679.07+1.07Moderate10,620
5May 11, 19768.96+0.96Minor10,260
6May 27, 19618.93+0.93Minor10,220
7Jan 17, 19748.79+0.79Minor9,679
8May 13, 19718.61+0.61Minor9,220
9May 26, 19998.59+0.59Minor8,900
10Apr 15, 20028.59+0.59Minor8,900
11May 16, 19728.56+0.56Minor8,870
12May 21, 20088.53+0.53Minor8,700
13Apr 27, 20128.52+0.52Minor8,670
14May 20, 19648.50+0.50Minor8,400
15Apr 5, 19918.50+0.50Minor8,800
16May 6, 19578.46+0.46Minor7,930
17May 13, 19698.35+0.35Minor8,130
18May 16, 19968.33+0.33Minor7,970
19Dec 11, 20258.30+0.30Minor7,940
20May 12, 19608.26+0.26Minor7,680
21May 16, 20118.23+0.23Minor7,660
22Nov 25, 19908.21+0.21Minor7,620
23May 7, 19668.20+0.20Minor7,440
24May 27, 19988.16+0.16Minor7,490
25May 26, 19828.10+0.10Minor7,280
26Nov 30, 19958.07+0.07Minor7,200
27May 16, 19758.03+0.03Minor7,080
28Apr 29, 19808.01+0.01Minor6,990
29Apr 30, 19657.97−0.03Action6,750
30Feb 9, 19967.96−0.04Action—
31May 14, 20137.94−0.06Action6,720
32Dec 17, 20257.94−0.06Action6,790
33Mar 25, 20077.92−0.08Action6,660
34Mar 16, 20157.90−0.10Action6,600
35May 1, 19877.80−0.20Action6,490
36Apr 7, 19887.80−0.20Action6,490
37May 26, 19837.79−0.21Action6,350
38May 21, 20207.79−0.21Action6,490
39May 8, 19897.69−0.31Action6,060
40May 16, 19787.67−0.33Action6,010
41May 17, 19737.63−0.37Action5,900
42May 7, 20177.63−0.37Action6,170
43May 18, 19707.58−0.42Action5,760
44May 1, 19817.56−0.44Action5,710
45May 26, 20216.37−1.63Below flood stage3,720
46May 4, 20256.23−1.77Below flood stage2,840

Other gauges in Lincoln County

Flood gauges in Lincoln County
Libby7.510.35 ft, Feb 9, 19961
Libby Dam near Libby27.528.50 ft, Jun 18, 20060

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

NOAA National Water Prediction Service, gauge TRYM8, 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.