Total streamflow across the Flathead River was last observed at 21,603 cfs, and is expected to yield approximately 42,849 acre-ft of water today; about 82% of normal. Average streamflow for this time of year is 26,496 cfs, with recent peaks last observed on 2012-06-27 when daily discharge volume was observed at 165,650 cfs.

Maximum discharge along the river is currently at the Flathead River At Perma Mt reporting a streamflow rate of 7,540 cfs. This is also the highest stage along the Flathead River, with a gauge stage of 8.51 ft at this location. This river is monitored from 4 different streamgauging stations along the Flathead River, the highest being situated at an altitude of 3,983 ft, the Flathead River At Flathead British Columbia.

The Flathead River is a 158-mile-long river located in western Montana, USA. The river has a rich history, having been inhabited by Native American tribes for centuries. It was also a major transportation route for fur traders in the 1800s. The river's hydrology is largely influenced by the surrounding mountains and glaciers, resulting in a steady flow of cold, clean water. The river is home to several reservoirs and dams, including the Kerr Dam and Hungry Horse Dam, which provide hydroelectric power and irrigation water for nearby agricultural communities. Recreational activities such as fishing, hiking, and rafting are popular along the river, which is known for its scenic beauty and abundant wildlife.