Search
Menu

Explore

Hazards

Analysis

Rankings

Reference

Missouri River at Toston

Highest listed crest 12.22 ftFlood stage 10.5 ft77 crests since 1941

The Missouri River at Toston crested at major flood stage 1 time among the 77 crests the National Weather Service lists from 1941 to 2022. The highest, 12.22 ft on June 12, 1997, was major flooding, 1.72 feet above flood stage.

The gauge

Highest listed crest
12.22 ft
June 12, 1997; 34,000 cubic feet per second
Flood stage
10.5 ft
Major flooding from 12.0 ft
Crests at major
1
28th of 93 gauges in Montana
Most recent flood crest
June 2, 2018
11.08 ft, moderate flooding
Location
Broadwater County
Montana

Flood stages

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

Flood categories, Missouri River at Toston
Action stage10.011Jun 15, 2022The level at which the NWS or its partners begin to take action
Flood stage (minor)10.56Jun 24, 1984Minimal or no property damage, but possibly some public threat
Moderate flood stage11.07Jun 2, 2018Some inundation of structures and roads near the stream
Major flood stage12.01Jun 12, 1997Extensive inundation of structures and roads

Every listed crest

77 crests from 1941 to 2022. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Missouri River at Toston, 1941 to 2022 468101214ft Flood stage 10.5 ftMajor 12.0 ft Jun 10, 1941: 6.97 ft, below flood stage; 11,600 cubic feet per secondJun 11, 1942: 10.46 ft, action stage; 26,600 cubic feet per secondJun 3, 1943: 10.70 ft, minor flooding; 26,000 cubic feet per secondJun 28, 1944: 9.39 ft, below flood stage; 19,300 cubic feet per secondJun 12, 1945: 7.46 ft, below flood stage; 12,200 cubic feet per secondJun 1, 1946: 7.41 ft, below flood stage; 11,800 cubic feet per secondJun 10, 1947: 9.89 ft, below flood stage; 21,800 cubic feet per secondJun 6, 1948: 11.77 ft, moderate flooding; 32,000 cubic feet per secondMay 18, 1949: 8.19 ft, below flood stage; 14,700 cubic feet per secondJun 23, 1950: 8.96 ft, below flood stage; 17,500 cubic feet per secondMay 25, 1951: 8.51 ft, below flood stage; 15,600 cubic feet per secondJun 8, 1952: 9.72 ft, below flood stage; 20,700 cubic feet per secondJun 16, 1953: 10.00 ft, action stage; 22,000 cubic feet per secondJun 30, 1954: 7.65 ft, below flood stage; 12,200 cubic feet per secondJun 17, 1955: 8.17 ft, below flood stage; 14,300 cubic feet per secondMay 30, 1956: 10.65 ft, minor flooding; 25,100 cubic feet per secondJun 9, 1957: 8.92 ft, below flood stage; 17,300 cubic feet per secondMay 26, 1958: 8.23 ft, below flood stage; 15,000 cubic feet per secondJun 16, 1959: 9.08 ft, below flood stage; 18,000 cubic feet per secondMay 14, 1960: 7.46 ft, below flood stage; 12,100 cubic feet per secondMay 31, 1961: 6.52 ft, below flood stage; 8,700 cubic feet per secondJun 17, 1962: 8.16 ft, below flood stage; 14,300 cubic feet per secondJun 16, 1963: 8.62 ft, below flood stage; 16,300 cubic feet per secondJun 12, 1964: 10.00 ft, action stage; 22,000 cubic feet per secondJun 21, 1965: 9.98 ft, below flood stage; 21,900 cubic feet per secondDec 17, 1965: 6.39 ft, below flood stageMay 11, 1966: 6.18 ft, below flood stage; 7,700 cubic feet per secondJun 24, 1967: 10.52 ft, minor flooding; 25,300 cubic feet per secondJun 14, 1968: 9.94 ft, below flood stage; 22,600 cubic feet per secondMay 28, 1969: 9.25 ft, below flood stage; 18,700 cubic feet per secondJun 10, 1970: 11.16 ft, moderate flooding; 28,200 cubic feet per secondJun 28, 1971: 10.36 ft, action stage; 23,800 cubic feet per secondJun 8, 1972: 10.13 ft, action stage; 22,700 cubic feet per secondMay 21, 1973: 7.42 ft, below flood stage; 11,600 cubic feet per secondJun 18, 1974: 11.32 ft, moderate flooding; 29,400 cubic feet per secondJun 26, 1975: 10.52 ft, minor flooding; 25,100 cubic feet per secondMay 21, 1976: 10.18 ft, action stage; 23,300 cubic feet per secondJun 12, 1977: 7.28 ft, below flood stage; 11,200 cubic feet per secondJun 10, 1978: 9.34 ft, below flood stage; 19,200 cubic feet per secondMay 29, 1979: 8.80 ft, below flood stage; 16,800 cubic feet per secondMay 25, 1980: 9.26 ft, below flood stage; 18,800 cubic feet per secondMay 24, 1981: 10.83 ft, minor flooding; 26,700 cubic feet per secondJun 18, 1982: 10.47 ft, action stage; 23,500 cubic feet per secondJun 13, 1983: 9.21 ft, below flood stage; 18,600 cubic feet per secondJun 24, 1984: 10.97 ft, minor flooding; 26,900 cubic feet per secondMay 5, 1985: 7.20 ft, below flood stage; 11,000 cubic feet per secondJun 6, 1986: 10.22 ft, action stage; 23,100 cubic feet per secondMay 28, 1987: 5.86 ft, below flood stage; 6,580 cubic feet per secondMay 30, 1988: 6.79 ft, below flood stage; 9,600 cubic feet per secondApr 27, 1989: 7.94 ft, below flood stage; 13,500 cubic feet per secondJun 12, 1990: 8.00 ft, below flood stage; 13,700 cubic feet per secondJun 9, 1991: 10.41 ft, action stage; 23,800 cubic feet per secondJun 18, 1992: 6.83 ft, below flood stage; 9,480 cubic feet per secondMay 23, 1993: 9.40 ft, below flood stage; 19,200 cubic feet per secondApr 26, 1994: 6.94 ft, below flood stage; 10,000 cubic feet per secondJun 8, 1995: 11.12 ft, moderate flooding; 27,300 cubic feet per secondJun 11, 1996: 11.22 ft, moderate flooding; 27,800 cubic feet per secondJun 12, 1997: 12.22 ft, major flooding; 34,000 cubic feet per secondJun 27, 1998: 9.94 ft, below flood stage; 21,600 cubic feet per secondMay 31, 1999: 9.50 ft, below flood stage; 19,600 cubic feet per secondMay 29, 2000: 6.83 ft, below flood stage; 9,760 cubic feet per secondJun 15, 2001: 6.09 ft, below flood stage; 7,590 cubic feet per secondJun 3, 2002: 8.68 ft, below flood stage; 16,200 cubic feet per secondJun 2, 2003: 9.63 ft, below flood stage; 20,200 cubic feet per secondJun 12, 2004: 6.87 ft, below flood stage; 9,730 cubic feet per secondJun 18, 2005: 7.67 ft, below flood stage; 12,500 cubic feet per secondJun 11, 2006: 8.88 ft, below flood stage; 17,000 cubic feet per secondJun 8, 2007: 7.00 ft, below flood stage; 10,300 cubic feet per secondJun 7, 2008: 9.39 ft, below flood stage; 19,100 cubic feet per secondJun 1, 2009: 9.20 ft, below flood stage; 18,300 cubic feet per secondJun 20, 2010: 10.00 ft, action stage; 21,800 cubic feet per secondJun 15, 2011: 11.53 ft, moderate flooding; 29,500 cubic feet per secondJun 6, 2012: 7.96 ft, below flood stage; 14,000 cubic feet per secondMay 21, 2013: 6.48 ft, below flood stage; 8,870 cubic feet per secondMay 30, 2014: 9.82 ft, below flood stage; 21,200 cubic feet per secondJun 2, 2018: 11.08 ft, moderate flooding; 27,383 cubic feet per secondJun 15, 2022: 10.19 ft, action stage; 23,300 cubic feet per second Highest, 12.22 ft, Jun 12, 1997 1960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Missouri River at Toston 1940s: 2 1950s: 1 1960s: 1 1970s: 3 3 1980s: 2 1990s: 3 2000s: 0 2010s: 2 2020s: 0 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: 5.77 ft on May 30, 1990.

Highest crests

The 50 highest of 77 listed crests.

Highest listed crests, Missouri River at Toston
1Jun 12, 199712.22+1.72Major34,000
2Jun 6, 194811.77+1.27Moderate32,000
3Jun 15, 201111.53+1.03Moderate29,500
4Jun 18, 197411.32+0.82Moderate29,400
5Jun 11, 199611.22+0.72Moderate27,800
6Jun 10, 197011.16+0.66Moderate28,200
7Jun 8, 199511.12+0.62Moderate27,300
8Jun 2, 201811.08+0.58Moderate27,383
9Jun 24, 198410.97+0.47Minor26,900
10May 24, 198110.83+0.33Minor26,700
11Jun 3, 194310.70+0.20Minor26,000
12May 30, 195610.65+0.15Minor25,100
13Jun 24, 196710.52+0.02Minor25,300
14Jun 26, 197510.52+0.02Minor25,100
15Jun 18, 198210.47−0.03Action23,500
16Jun 11, 194210.46−0.04Action26,600
17Jun 9, 199110.41−0.09Action23,800
18Jun 28, 197110.36−0.14Action23,800
19Jun 6, 198610.22−0.28Action23,100
20Jun 15, 202210.19−0.31Action23,300
21May 21, 197610.18−0.32Action23,300
22Jun 8, 197210.13−0.37Action22,700
23Jun 16, 195310.00−0.50Action22,000
24Jun 12, 196410.00−0.50Action22,000
25Jun 20, 201010.00−0.50Action21,800
26Jun 21, 19659.98−0.52Below flood stage21,900
27Jun 14, 19689.94−0.56Below flood stage22,600
28Jun 27, 19989.94−0.56Below flood stage21,600
29Jun 10, 19479.89−0.61Below flood stage21,800
30May 30, 20149.82−0.68Below flood stage21,200
31Jun 8, 19529.72−0.78Below flood stage20,700
32Jun 2, 20039.63−0.87Below flood stage20,200
33May 31, 19999.50−1.00Below flood stage19,600
34May 23, 19939.40−1.10Below flood stage19,200
35Jun 28, 19449.39−1.11Below flood stage19,300
36Jun 7, 20089.39−1.11Below flood stage19,100
37Jun 10, 19789.34−1.16Below flood stage19,200
38May 25, 19809.26−1.24Below flood stage18,800
39May 28, 19699.25−1.25Below flood stage18,700
40Jun 13, 19839.21−1.29Below flood stage18,600
41Jun 1, 20099.20−1.30Below flood stage18,300
42Jun 16, 19599.08−1.42Below flood stage18,000
43Jun 23, 19508.96−1.54Below flood stage17,500
44Jun 9, 19578.92−1.58Below flood stage17,300
45Jun 11, 20068.88−1.62Below flood stage17,000
46May 29, 19798.80−1.70Below flood stage16,800
47Jun 3, 20028.68−1.82Below flood stage16,200
48Jun 16, 19638.62−1.88Below flood stage16,300
49May 25, 19518.51−1.99Below flood stage15,600
50May 26, 19588.23−2.27Below flood stage15,000

Other gauges in Broadwater County

Flood gauges in Broadwater County
Three Forks8.09.88 ft, Jan 3, 19975

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

NOAA National Water Prediction Service, gauge TOSM8, 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.