Gallatin River at Logan

Last updated: Jun 2, 2025, 3:33 PM UTC

No watches, warnings or advisories are in effect for this area.

Warning: no valid ratings curve available. Transformations to and from FEET/CFS/KCFS will not happen.

US Geological Survey
Observations courtesy of U.S. Geological Survey

Scale to Flood Categories

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Traces and Thresholds Click to turn on/off display

Observed (OBS) 06/02/2025 8:00 AM MDT

Official Forecast (FCST) 06/01/2025 7:42 PM MDT

Record: 11.9 ft

CATEGORY STAGE

Major Flooding 11 ft

Moderate Flooding 10 ft

Minor Flooding 9 ft

Action 8 ft

Reliability of the Forecast:

NOTE: Forecasts are issued routinely during the warm season, and as needed at other times of the year.
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	CATEGORY	STAGE
	Major Flooding	11 ft
	Moderate Flooding	10 ft
	Minor Flooding	9 ft
	Action	8 ft

Flood Impacts 🅘

9.9 - Water into USGS gage house.
8.8 - Water may be on small bridges and around railroad bridge footing.
8.7 - February 2019...Ice Jam. Water level near 8.7 feet. Water flooding farm field next to river.

Gauge Info

Coordinates	45.8854, -111.438
RFC	MBRFC
State	MT
WFO	TFX
County	Gallatin
Data Provider(s)
US Geological Survey	USGS--Water Resources of the United States
USGS	06052500

Gauge Location

Recent Crests

1.	9.75 ft	on 06-14-2022
2.	10.87 ft	on 02-28-2019
3.	8.70 ft	on 02-10-2019
4.	9.15 ft	on 06-02-2018
5.	8.87 ft	on 05-29-2014

Historic Crests

1.	11.88 ft	on 02-05-1963
2.	11.85 ft	on 02-17-1969
3.	10.87 ft	on 02-28-2019
4.	10.63 ft	on 01-29-1975
5.	10.32 ft	on 01-01-1980

Low Water Records

(P) - Preliminary values subject to further review
¹ - Gauge datum changed during this year

Vertical Datum Table

type	NGVD29
major Flooding	4097.42 ft
moderate Flooding	4096.42 ft
minor Flooding	4095.42 ft
action	4094.42 ft
Latest Value	4094.49 ft
Gauge Zero	4086.42 ft

Gauge Photos

Photo 1 of 2

Looking downstream from highway above gauge house

Probability Information

Photo 1 of 3

Weekly Chance of Exceeding Levels
- About this graph
Chance of Exceeding Levels During Entire Period
- About this graph
Short Range Forecast Uncertainty
About this graph | Product Description Document

Collaborative Agencies

The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.

Resources

Hydrologic Resource Links

Additional Resource Links

WFO Information

Weather Forecast Office

Great Falls

5324 Tri-Hill Frontage Rd

Great Falls, MT 59404-4933

(406) 453-2081

Ask Questions/Webmaster

Official Homepage

1.	9.75 ft	on 06-14-2022
2.	10.87 ft	on 02-28-2019
3.	8.70 ft	on 02-10-2019
4.	9.15 ft	on 06-02-2018
5.	8.87 ft	on 05-29-2014
6.	7.46 ft	on 06-14-2013
7.	8.92 ft	on 01-13-2013
8.	8.05 ft	on 06-05-2012
9.	9.35 ft	on 06-30-2011
10.	9.57 ft	on 01-02-2011
11.	8.52 ft	on 06-05-2010
12.	8.09 ft	on 06-01-2009
13.	8.59 ft	on 06-23-2008
14.	3.49 ft	on 06-07-2007
15.	7.22 ft	on 02-03-2007
16.	7.68 ft	on 06-10-2006
17.	8.20 ft	on 12-20-2005
18.	7.14 ft	on 06-18-2005
19.	8.47 ft	on 01-07-2005
20.	7.02 ft	on 06-11-2004
21.	7.40 ft	on 01-08-2004
22.	8.24 ft	on 05-30-2003
23.	8.11 ft	on 06-03-2002
24.	6.26 ft	on 05-15-2001
25.	9.64 ft	on 01-29-2001
26.	7.10 ft	on 05-29-2000
27.	6.25 ft	on 06-21-1999	¹
28.	8.11 ft	on 05-30-1999
29.	8.30 ft	on 06-26-1998
30.	9.80 ft	on 06-08-1997
31.	9.87 ft	on 12-27-1996
32.	8.71 ft	on 06-10-1996
33.	10.18 ft	on 02-09-1996
34.	8.67 ft	on 06-06-1995
35.	6.64 ft	on 05-13-1994
36.	10.18 ft	on 11-26-1993
37.	8.30 ft	on 05-22-1993
38.	8.67 ft	on 01-01-1993
39.	7.33 ft	on 06-18-1992
40.	9.06 ft	on 06-06-1991
41.	7.30 ft	on 06-11-1990
42.	6.69 ft	on 06-17-1989
43.	6.96 ft	on 05-17-1988
44.	5.59 ft	on 05-29-1987
45.	8.06 ft	on 11-26-1985
46.	6.61 ft	on 05-04-1985
47.	9.16 ft	on 02-04-1985
48.	8.12 ft	on 05-16-1984
49.	9.87 ft	on 12-21-1983
50.	7.89 ft	on 06-12-1983
51.	8.16 ft	on 06-29-1982
52.	9.54 ft	on 01-23-1982
53.	8.47 ft	on 05-23-1981
54.	6.87 ft	on 05-25-1980
55.	10.32 ft	on 01-01-1980
56.	9.38 ft	on 01-03-1979
57.	7.05 ft	on 06-10-1978
58.	7.15 ft	on 01-03-1978
59.	5.57 ft	on 06-11-1977
60.	7.93 ft	on 06-23-1976
61.	8.44 ft	on 07-04-1975
62.	10.63 ft	on 01-29-1975
63.	9.02 ft	on 06-18-1974
64.	9.90 ft	on 01-16-1974
65.	7.41 ft	on 06-10-1973
66.	8.55 ft	on 02-10-1973
67.	7.13 ft	on 06-08-1972
68.	9.03 ft	on 12-28-1971
69.	8.74 ft	on 06-28-1971
70.	9.30 ft	on 01-07-1971
71.	9.03 ft	on 06-10-1970
72.	7.18 ft	on 06-11-1969
73.	11.85 ft	on 02-17-1969
74.	7.97 ft	on 06-14-1968
75.	9.80 ft	on 02-01-1968
76.	7.54 ft	on 06-13-1965
77.	6.56 ft	on 06-15-1963
78.	11.88 ft	on 02-05-1963
79.	6.64 ft	on 06-15-1962
80.	8.50 ft	on 12-11-1961
81.	4.88 ft	on 05-30-1961
82.	6.34 ft	on 05-13-1960
83.	8.83 ft	on 01-17-1960
84.	7.65 ft	on 06-15-1959
85.	5.90 ft	on 05-26-1958
86.	6.79 ft	on 06-09-1957
87.	7.29 ft	on 02-05-1957
88.	7.97 ft	on 05-29-1956
89.	8.83 ft	on 12-19-1955
90.	6.18 ft	on 06-16-1955
91.	7.48 ft	on 01-07-1955
92.	5.74 ft	on 06-28-1954
93.	7.18 ft	on 01-23-1954
94.	7.34 ft	on 06-14-1953
95.	7.78 ft	on 06-07-1952
96.	7.94 ft	on 01-24-1952
97.	6.41 ft	on 05-25-1951
98.	6.29 ft	on 06-22-1950
99.	6.26 ft	on 05-18-1949
100.	7.23 ft	on 12-25-1948
101.	8.40 ft	on 06-05-1948
102.	7.46 ft	on 06-21-1947
103.	6.04 ft	on 06-06-1946
104.	5.83 ft	on 06-24-1945
105.	7.30 ft	on 12-27-1944
106.	6.68 ft	on 06-27-1944
107.	7.50 ft	on 06-20-1943	¹
108.	8.94 ft	on 02-10-1943
109.	7.10 ft	on 06-09-1942
110.	7.23 ft	on 01-03-1942
111.	4.80 ft	on 06-06-1941
112.	5.92 ft	on 06-14-1940
113.	5.40 ft	on 05-06-1939
114.	6.90 ft	on 05-30-1938
115.	5.95 ft	on 06-17-1937
116.	6.30 ft	on 05-15-1936
117.	6.10 ft	on 06-14-1935
118.	5.94 ft	on 06-13-1933
119.	6.42 ft	on 06-16-1932
120.	5.46 ft	on 06-03-1931
121.	5.36 ft	on 05-31-1930
122.	6.60 ft	on 06-17-1929

1.	11.88 ft	on 02-05-1963
2.	11.85 ft	on 02-17-1969
3.	10.87 ft	on 02-28-2019
4.	10.63 ft	on 01-29-1975
5.	10.32 ft	on 01-01-1980
6.	10.18 ft	on 11-26-1993
7.	10.18 ft	on 02-09-1996
8.	9.90 ft	on 01-16-1974
9.	9.87 ft	on 12-27-1996
10.	9.87 ft	on 12-21-1983
11.	9.80 ft	on 06-08-1997
12.	9.80 ft	on 02-01-1968
13.	9.75 ft	on 06-14-2022
14.	9.64 ft	on 01-29-2001
15.	9.57 ft	on 01-02-2011
16.	9.54 ft	on 01-23-1982
17.	9.38 ft	on 01-03-1979
18.	9.35 ft	on 06-30-2011
19.	9.30 ft	on 01-07-1971
20.	9.16 ft	on 02-04-1985
21.	9.15 ft	on 06-02-2018
22.	9.06 ft	on 06-06-1991
23.	9.03 ft	on 06-10-1970
24.	9.03 ft	on 12-28-1971
25.	9.02 ft	on 06-18-1974
26.	8.94 ft	on 02-10-1943
27.	8.92 ft	on 01-13-2013
28.	8.87 ft	on 05-29-2014
29.	8.83 ft	on 01-17-1960
30.	8.83 ft	on 12-19-1955
31.	8.74 ft	on 06-28-1971
32.	8.71 ft	on 06-10-1996
33.	8.70 ft	on 02-10-2019
34.	8.67 ft	on 06-06-1995
35.	8.67 ft	on 01-01-1993
36.	8.59 ft	on 06-23-2008
37.	8.55 ft	on 02-10-1973
38.	8.52 ft	on 06-05-2010
39.	8.50 ft	on 12-11-1961
40.	8.47 ft	on 05-23-1981
41.	8.47 ft	on 01-07-2005
42.	8.44 ft	on 07-04-1975
43.	8.40 ft	on 06-05-1948
44.	8.30 ft	on 06-26-1998
45.	8.30 ft	on 05-22-1993
46.	8.24 ft	on 05-30-2003
47.	8.20 ft	on 12-20-2005
48.	8.16 ft	on 06-29-1982
49.	8.12 ft	on 05-16-1984
50.	8.11 ft	on 05-30-1999
51.	8.11 ft	on 06-03-2002
52.	8.09 ft	on 06-01-2009
53.	8.06 ft	on 11-26-1985
54.	8.05 ft	on 06-05-2012
55.	7.97 ft	on 06-14-1968
56.	7.97 ft	on 05-29-1956
57.	7.94 ft	on 01-24-1952
58.	7.93 ft	on 06-23-1976
59.	7.89 ft	on 06-12-1983
60.	7.78 ft	on 06-07-1952
61.	7.68 ft	on 06-10-2006
62.	7.65 ft	on 06-15-1959
63.	7.54 ft	on 06-13-1965
64.	7.50 ft	on 06-20-1943	¹
65.	7.48 ft	on 01-07-1955
66.	7.46 ft	on 06-14-2013
67.	7.46 ft	on 06-21-1947
68.	7.41 ft	on 06-10-1973
69.	7.40 ft	on 01-08-2004
70.	7.34 ft	on 06-14-1953
71.	7.33 ft	on 06-18-1992
72.	7.30 ft	on 12-27-1944
73.	7.30 ft	on 06-11-1990
74.	7.29 ft	on 02-05-1957
75.	7.23 ft	on 12-25-1948
76.	7.23 ft	on 01-03-1942
77.	7.22 ft	on 02-03-2007
78.	7.18 ft	on 01-23-1954
79.	7.18 ft	on 06-11-1969
80.	7.15 ft	on 01-03-1978
81.	7.14 ft	on 06-18-2005
82.	7.13 ft	on 06-08-1972
83.	7.10 ft	on 06-09-1942
84.	7.10 ft	on 05-29-2000
85.	7.05 ft	on 06-10-1978
86.	7.02 ft	on 06-11-2004
87.	6.96 ft	on 05-17-1988
88.	6.90 ft	on 05-30-1938
89.	6.87 ft	on 05-25-1980
90.	6.79 ft	on 06-09-1957
91.	6.69 ft	on 06-17-1989
92.	6.68 ft	on 06-27-1944
93.	6.64 ft	on 05-13-1994
94.	6.64 ft	on 06-15-1962
95.	6.61 ft	on 05-04-1985
96.	6.60 ft	on 06-17-1929
97.	6.56 ft	on 06-15-1963
98.	6.42 ft	on 06-16-1932
99.	6.41 ft	on 05-25-1951
100.	6.34 ft	on 05-13-1960
101.	6.30 ft	on 05-15-1936
102.	6.29 ft	on 06-22-1950
103.	6.26 ft	on 05-15-2001
104.	6.26 ft	on 05-18-1949
105.	6.25 ft	on 06-21-1999	¹
106.	6.18 ft	on 06-16-1955
107.	6.10 ft	on 06-14-1935
108.	6.04 ft	on 06-06-1946
109.	5.95 ft	on 06-17-1937
110.	5.94 ft	on 06-13-1933
111.	5.92 ft	on 06-14-1940
112.	5.90 ft	on 05-26-1958
113.	5.83 ft	on 06-24-1945
114.	5.74 ft	on 06-28-1954
115.	5.59 ft	on 05-29-1987
116.	5.57 ft	on 06-11-1977
117.	5.46 ft	on 06-03-1931
118.	5.40 ft	on 05-06-1939
119.	5.36 ft	on 05-31-1930
120.	4.88 ft	on 05-30-1961
121.	4.80 ft	on 06-06-1941
122.	3.49 ft	on 06-07-2007