Okanogan River near Tonasket

Last updated: Jun 23, 2025, 9:36 AM 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.

Bpa
US Geological Survey

Scale to Flood Categories

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Traces and Thresholds Click to turn on/off display

Observed (OBS) 06/23/2025 2:15 AM PDT

Official Forecast (FCST) 06/22/2025 9:00 AM PDT

Record: 22.5 ft

Low Threshold: 3 ft

CATEGORY STAGE

Major Flooding 18 ft

Moderate Flooding 17 ft

Minor Flooding 15 ft

Action 14 ft

Reliability of the Forecast:

NOTE: Forecasts are issued routinely year-round.
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	CATEGORY	STAGE
	Major Flooding	18 ft
	Moderate Flooding	17 ft
	Minor Flooding	15 ft
	Action	14 ft

Flood Impacts 🅘

22 - Severe flooding of surrounding cropland is likely. Damage is possible to numerous homes, outbuildings, irrigation systems and roads adjacent to the river. Water will be over Highway 97 near Ellisford and other areas between Tonasket and Oroville.
19.5 - Buildings along the river on Brooks Tract Road in East Omak will be flooded and utilities will be impacted.
19 - Water may be into homes along the river in and near Tonasket. Water will start to come over the banks at Brooks Track Rd in East Omak.

Gauge Info

Coordinates	48.6324, -119.462
RFC	NWRFC
State	WA
WFO	OTX
County	Okanogan
Data Provider(s)
US Department of Energy - Bonneville Power Administration	BPA
US Geological Survey	USGS
USGS	12445000

Gauge Location

Recent Crests

1.	10.61 ft	on 05-18-2024	(P)
2.	14.38 ft	on 05-07-2023
3.	14.15 ft	on 06-07-2022
4.	15.48 ft	on 11-17-2021
5.	15.81 ft	on 06-02-2020

Historic Crests

1.	22.54 ft	on 06-02-1972
2.	21.79 ft	on 05-31-1948
3.	19.71 ft	on 05-12-2018
4.	18.79 ft	on 06-19-1974
5.	18.66 ft	on 06-18-1950

Low Water Records

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

Vertical Datum Table

type	NGVD29
major Flooding	878.78 ft
moderate Flooding	877.78 ft
minor Flooding	875.78 ft
action	874.78 ft
Latest Value	867.00 ft
Gauge Zero	860.78 ft

Gauge Photos

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Probability Information

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Weekly Chance of Exceeding Levels
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Chance of Exceeding Levels During Entire Period
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Short Range Forecast Uncertainty
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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

Spokane

2601 N. Rambo Rd.

Spokane, WA 99224

(509) 244-0110

Ask Questions/Webmaster

Official Homepage

1.	10.61 ft	on 05-18-2024	(P)
2.	14.38 ft	on 05-07-2023
3.	14.15 ft	on 06-07-2022
4.	15.48 ft	on 11-17-2021
5.	15.81 ft	on 06-02-2020
6.	11.71 ft	on 05-18-2019
7.	19.71 ft	on 05-12-2018
8.	17.04 ft	on 06-02-2017
9.	15.34 ft	on 05-14-2017
10.	15.73 ft	on 04-25-2016
11.	12.17 ft	on 05-25-2015
12.	15.83 ft	on 05-25-2014
13.	15.80 ft	on 05-19-2014
14.	17.15 ft	on 05-15-2013
15.	15.02 ft	on 05-18-2012
16.	17.62 ft	on 06-11-2011
17.	12.42 ft	on 06-04-2010
18.	11.70 ft	on 06-01-2009
19.	15.10 ft	on 05-22-2008
20.	12.45 ft	on 06-01-2007
21.	14.11 ft	on 05-22-2006
22.	13.70 ft	on 01-25-2005
23.	11.34 ft	on 10-22-2003
24.	11.22 ft	on 06-01-2003
25.	14.89 ft	on 06-01-2002
26.	10.47 ft	on 05-25-2001
27.	11.59 ft	on 05-23-2000
28.	14.89 ft	on 06-18-1999
29.	13.90 ft	on 05-08-1998
30.	17.80 ft	on 05-18-1997
31.	15.36 ft	on 06-09-1996
32.	-9999.00 ft	on 06-01-1995
33.	11.33 ft	on 05-11-1994
34.	13.58 ft	on 05-16-1993
35.	10.45 ft	on 05-09-1992
36.	17.37 ft	on 05-23-1991
37.	13.76 ft	on 06-12-1990
38.	12.57 ft	on 06-07-1989
39.	10.55 ft	on 05-15-1988
40.	13.40 ft	on 05-13-1987
41.	16.88 ft	on 06-02-1986
42.	13.56 ft	on 05-25-1985
43.	14.15 ft	on 06-17-1984
44.	16.11 ft	on 06-01-1983
45.	14.17 ft	on 06-16-1982
46.	13.60 ft	on 05-27-1981
47.	12.81 ft	on 05-07-1980
48.	11.30 ft	on 05-27-1979
49.	14.69 ft	on 06-08-1978
50.	9.80 ft	on 06-09-1977
51.	14.19 ft	on 06-04-1975
52.	18.79 ft	on 06-19-1974
53.	11.75 ft	on 06-19-1973
54.	22.54 ft	on 06-02-1972
55.	15.74 ft	on 05-15-1971
56.	13.42 ft	on 06-05-1970
57.	14.24 ft	on 05-25-1969
58.	13.91 ft	on 05-22-1968
59.	15.82 ft	on 06-06-1967
60.	11.21 ft	on 05-11-1966
61.	14.08 ft	on 06-12-1965
62.	16.30 ft	on 06-12-1964
63.	12.70 ft	on 05-25-1963
64.	12.50 ft	on 05-30-1962
65.	16.59 ft	on 06-06-1961
66.	13.46 ft	on 06-05-1960
67.	15.99 ft	on 06-06-1959
68.	13.93 ft	on 05-26-1958
69.	16.71 ft	on 05-22-1957
70.	17.37 ft	on 05-26-1956
71.	18.12 ft	on 06-14-1955
72.	15.21 ft	on 05-22-1954
73.	13.86 ft	on 06-15-1953
74.	14.04 ft	on 05-21-1952
75.	16.77 ft	on 05-25-1951
76.	18.66 ft	on 06-18-1950
77.	18.05 ft	on 05-17-1949
78.	21.79 ft	on 05-31-1948
79.	13.47 ft	on 05-10-1947
80.	15.12 ft	on 05-29-1946
81.	15.74 ft	on 06-02-1945
82.	13.43 ft	on 06-03-1944
83.	13.41 ft	on 06-11-1943
84.	15.78 ft	on 05-28-1942
85.	9.81 ft	on 05-03-1941
86.	10.61 ft	on 05-26-1940
87.	12.35 ft	on 05-17-1939
88.	16.51 ft	on 05-28-1938
89.	14.16 ft	on 06-05-1937
90.	12.60 ft	on 05-16-1936
91.	14.08 ft	on 06-02-1935
92.	18.31 ft	on 04-27-1934
93.	15.37 ft	on 06-18-1933
94.	11.52 ft	on 05-12-1932
95.	10.23 ft	on 05-16-1931
96.	10.06 ft	on 06-09-1930
97.	10.16 ft	on 06-10-1929

1.	22.54 ft	on 06-02-1972
2.	21.79 ft	on 05-31-1948
3.	19.71 ft	on 05-12-2018
4.	18.79 ft	on 06-19-1974
5.	18.66 ft	on 06-18-1950
6.	18.31 ft	on 04-27-1934
7.	18.12 ft	on 06-14-1955
8.	18.05 ft	on 05-17-1949
9.	17.80 ft	on 05-18-1997
10.	17.62 ft	on 06-11-2011
11.	17.37 ft	on 05-23-1991
12.	17.37 ft	on 05-26-1956
13.	17.15 ft	on 05-15-2013
14.	17.04 ft	on 06-02-2017
15.	16.88 ft	on 06-02-1986
16.	16.77 ft	on 05-25-1951
17.	16.71 ft	on 05-22-1957
18.	16.59 ft	on 06-06-1961
19.	16.51 ft	on 05-28-1938
20.	16.30 ft	on 06-12-1964
21.	16.11 ft	on 06-01-1983
22.	15.99 ft	on 06-06-1959
23.	15.83 ft	on 05-25-2014
24.	15.82 ft	on 06-06-1967
25.	15.81 ft	on 06-02-2020
26.	15.80 ft	on 05-19-2014
27.	15.78 ft	on 05-28-1942
28.	15.74 ft	on 05-15-1971
29.	15.74 ft	on 06-02-1945
30.	15.73 ft	on 04-25-2016
31.	15.48 ft	on 11-17-2021
32.	15.37 ft	on 06-18-1933
33.	15.36 ft	on 06-09-1996
34.	15.34 ft	on 05-14-2017
35.	15.21 ft	on 05-22-1954
36.	15.12 ft	on 05-29-1946
37.	15.10 ft	on 05-22-2008
38.	15.02 ft	on 05-18-2012
39.	14.89 ft	on 06-01-2002
40.	14.89 ft	on 06-18-1999
41.	14.69 ft	on 06-08-1978
42.	14.38 ft	on 05-07-2023
43.	14.24 ft	on 05-25-1969
44.	14.19 ft	on 06-04-1975
45.	14.17 ft	on 06-16-1982
46.	14.16 ft	on 06-05-1937
47.	14.15 ft	on 06-07-2022
48.	14.15 ft	on 06-17-1984
49.	14.11 ft	on 05-22-2006
50.	14.08 ft	on 06-02-1935
51.	14.08 ft	on 06-12-1965
52.	14.04 ft	on 05-21-1952
53.	13.93 ft	on 05-26-1958
54.	13.91 ft	on 05-22-1968
55.	13.90 ft	on 05-08-1998
56.	13.86 ft	on 06-15-1953
57.	13.76 ft	on 06-12-1990
58.	13.70 ft	on 01-25-2005
59.	13.60 ft	on 05-27-1981
60.	13.58 ft	on 05-16-1993
61.	13.56 ft	on 05-25-1985
62.	13.47 ft	on 05-10-1947
63.	13.46 ft	on 06-05-1960
64.	13.43 ft	on 06-03-1944
65.	13.42 ft	on 06-05-1970
66.	13.41 ft	on 06-11-1943
67.	13.40 ft	on 05-13-1987
68.	12.81 ft	on 05-07-1980
69.	12.70 ft	on 05-25-1963
70.	12.60 ft	on 05-16-1936
71.	12.57 ft	on 06-07-1989
72.	12.50 ft	on 05-30-1962
73.	12.45 ft	on 06-01-2007
74.	12.42 ft	on 06-04-2010
75.	12.35 ft	on 05-17-1939
76.	12.17 ft	on 05-25-2015
77.	11.75 ft	on 06-19-1973
78.	11.71 ft	on 05-18-2019
79.	11.70 ft	on 06-01-2009
80.	11.59 ft	on 05-23-2000
81.	11.52 ft	on 05-12-1932
82.	11.34 ft	on 10-22-2003
83.	11.33 ft	on 05-11-1994
84.	11.30 ft	on 05-27-1979
85.	11.22 ft	on 06-01-2003
86.	11.21 ft	on 05-11-1966
87.	10.61 ft	on 05-18-2024	(P)
88.	10.61 ft	on 05-26-1940
89.	10.55 ft	on 05-15-1988
90.	10.47 ft	on 05-25-2001
91.	10.45 ft	on 05-09-1992
92.	10.23 ft	on 05-16-1931
93.	10.16 ft	on 06-10-1929
94.	10.06 ft	on 06-09-1930
95.	9.81 ft	on 05-03-1941
96.	9.80 ft	on 06-09-1977
97.	-9999.00 ft	on 06-01-1995