Okanogan River near Tonasket

The past week

What floods at each level

• 22 ft

  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 ft

  Buildings along the river on Brooks Tract Road in East Omak will be flooded and utilities will be impacted.

• 19 ft

  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 ft

  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 ft

  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 ft

  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 ft

  Minor flooding in low lying areas and pasture lands is likely from Omak to Tonasket, especially near Ellisford.

• 15 ft

  Minor flooding of low lying areas and pasture lands is possible between Highway 7 and 97 from Oroville to Riverside.

Highest crests on record

When the water runs low

• 600 cfs

  Minimum base flow for August 15 and September 1st & 15th at this river gage, which is the lowest base flow of the year. The affected stream reach is from the confluence of Chewiliken Creek to confluence of Similkameen River. Water-rights junior to the base flows established in the rule may be restricted if streamflow drops below this value. For more information on this and the minimum base flows for other times in the year and for other reaches, refer to Washington Administrative Code (WAC) Chapter 173-549.

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