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Okanogan River near Tonasket

Critical Stages
14' - Action
15' - Flood
17' - Moderate
18' - Major

Latest Observation

Updated: 7:15 AM PST 12/14/25

Status: No Flooding

Stage: 9.11 ft

Flow: 6.14 kcfs

Forecast

TimeStage (ft)Flow (kcfs)
10 AM 12/14 9.01 5.97
4 PM 12/14 8.96 5.89
10 PM 12/14 8.91 5.81
4 AM 12/15 8.86 5.72
10 AM 12/15 8.82 5.66
4 PM 12/15 8.78 5.59
10 PM 12/15 8.81 5.64
4 AM 12/16 9.04 6.02
10 AM 12/16 9.56 6.92
4 PM 12/16 10.27 8.24
10 PM 12/16 10.93 9.46
4 AM 12/17 11.4 10.4
10 AM 12/17 11.66 10.9
4 PM 12/17 11.75 11
10 PM 12/17 11.77 11.1
4 AM 12/18 11.77 11.1
10 AM 12/18 11.71 11
4 PM 12/18 11.54 10.6
10 PM 12/18 11.28 10.1
4 AM 12/19 10.98 9.56
10 AM 12/19 10.71 9.06
4 PM 12/19 10.49 8.65
10 PM 12/19 10.31 8.32
4 AM 12/20 10.16 8.04
10 AM 12/20 10.04 7.81
4 PM 12/20 9.93 7.6
10 PM 12/20 9.83 7.42
4 AM 12/21 9.73 7.23
10 AM 12/21 9.64 7.07
4 PM 12/21 9.55 6.9
10 PM 12/21 9.46 6.74
4 AM 12/22 9.38 6.6
10 AM 12/22 9.3 6.46
4 PM 12/22 9.23 6.34
10 PM 12/22 9.16 6.22
4 AM 12/23 9.09 6.11
TimeStage (ft)Flow (kcfs)
7:15 AM 12/14 9.11 6.14
7:00 AM 12/14 9.12 6.16
6:45 AM 12/14 9.12 6.16
6:30 AM 12/14 9.12 6.16
6:15 AM 12/14 9.12 6.16
6:00 AM 12/14 9.13 6.17
5:45 AM 12/14 9.12 6.16
5:30 AM 12/14 9.13 6.17
5:15 AM 12/14 9.13 6.17
5:00 AM 12/14 9.14 6.19
4:45 AM 12/14 9.14 6.19
4:30 AM 12/14 9.14 6.19
4:15 AM 12/14 9.14 6.19
4:00 AM 12/14 9.14 6.19
3:45 AM 12/14 9.14 6.19
3:30 AM 12/14 9.14 6.19
3:15 AM 12/14 9.14 6.19
3:00 AM 12/14 9.14 6.19
2:45 AM 12/14 9.15 6.21
2:30 AM 12/14 9.15 6.21
2:15 AM 12/14 9.15 6.21
2:00 AM 12/14 9.16 6.22
1:45 AM 12/14 9.16 6.22
1:30 AM 12/14 9.16 6.22
1:15 AM 12/14 9.17 6.24
1:00 AM 12/14 9.17 6.24
12:45 AM 12/14 9.17 6.24
12:30 AM 12/14 9.18 6.26
12:15 AM 12/14 9.18 6.26
12:00 AM 12/14 9.19 6.27
Hydrograph for Okanogan River near Tonasket
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.
18' - Water will be approaching homes along the river in and near Tonasket. Major flooding of surrounding cropland is likely. Some homes and buildings adjacent to the river will experience some basement and first floor flooding.
17' - Low lying fields and pasture land in the flood plain along the Okanogan river valley, from Oroville to Okanogan, will be flooded. Some homes near the river in Okanogan may experience some basement flooding from seepage. Water will be between the railroad and Highway 97 near Ellisford to south Oroville. Water will be against the shoulder of Omak River Road across from Wanacut Creek.
16' - Pasture land between Rodeo Track Road and Benton Street, on the east side of the river near Omak, will begin to flood. Flooding increases between Tonasket and Oroville.
15.5' - Minor flooding in low lying areas and pasture lands is likely from Omak to Tonasket, especially near Ellisford.
15' - Minor flooding of low lying areas and pasture lands is possible between Highway 7 and 97 from Oroville to Riverside.
DateStage (ft)
Jun 2, 1972 22.54
May 31, 1948 21.79
May 12, 2018 19.71
Jun 19, 1974 18.79
Jun 18, 1950 18.66
Apr 27, 1934 18.31
Jun 14, 1955 18.12
May 17, 1949 18.05
May 18, 1997 17.8
Jun 11, 2011 17.62
May 23, 1991 17.37
May 26, 1956 17.37
May 15, 2013 17.15
Jun 2, 2017 17.04
Jun 2, 1986 16.88
May 25, 1951 16.77
May 22, 1957 16.71
Jun 6, 1961 16.59
May 28, 1938 16.51
Jun 12, 1964 16.3

Data provided by the National Weather Service.