Total streamflow across the Okanogan River was last observed at 10,539 cfs, and is expected to yield approximately 20,904 acre-ft of water today; about 73% of normal. Average streamflow for this time of year is 14,508 cfs, with recent peaks last observed on 2018-05-12 when daily discharge volume was observed at 69,180 cfs.

Maximum discharge along the river is currently at the Okanogan River At Malott reporting a streamflow rate of 5,080 cfs. However, the streamgauge with the highest stage along the river is the Okanogan River Near Tonasket with a gauge stage of 8.29 ft. This river is monitored from 3 different streamgauging stations along the Okanogan River, the highest being situated at an altitude of 887 ft, the Okanogan River At Oroville.

The Okanogan River is a 115-mile-long river that flows through Okanogan County in Washington state. The river has a rich history, as it was an important trade route for Native American tribes and later became a center for gold mining. Today, the river is used for irrigation and hydroelectric power generation. The river's hydrology is heavily influenced by snowmelt from the nearby Cascade Mountains. The river is home to several reservoirs and dams, including the Enloe Dam, which generates electricity for the region. The river is also a popular destination for recreational activities such as fishing, camping, and rafting. Additionally, the river is used for agricultural purposes, such as irrigation for fruit orchards and hay farms.