Total streamflow across the
Flathead River
was last observed at
42,090
cfs, and is expected to yield approximately
83,485
acre-ft of water today; about 159%
of normal.
River levels are high.
Average streamflow for this time of year is
26,422 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 Columbia Falls Mt
reporting a streamflow rate of 14,600 cfs.
However, the streamgauge with the highest stage along the river is the
Flathead River At Perma Mt
with a gauge stage of 10.53 ft.
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.
| Last Updated | 2025-12-15 |
| Discharge Volume | 83,485 ACRE-FT |
| Streamflow |
42,090.0 cfs
-370.0 cfs (-0.87%) |
| Percent of Normal | 159.3% |
| Maximum |
165,650.0 cfs
2012-06-27 |
| Seasonal Avg | 26,422 cfs |
| Streamgauge | Streamflow | Gauge Stage | 24hr Change (%) | % Normal | Minimum (cfs) | Maximum (cfs) | Air Temp | Elevation |
|---|---|---|---|---|---|---|---|---|
|
Flathead River At Flathead British Columbia
USGS 12355000 |
1190 cfs | 5.88 ft | -18.49 | |||||
|
Flathead River At Columbia Falls Mt
USGS 12363000 |
14600 cfs | 7.51 ft | -17.51 | |||||
|
Flathead River Near Polson Mt
USGS 12372000 |
13500 cfs | 7.8 ft | 8.87 | |||||
|
Flathead River At Perma Mt
USGS 12388700 |
12800 cfs | 10.53 ft | 17.43 |
The Flathead River (Salish: ntx̣ʷetkʷ, ntx̣ʷe ), in the northwestern part of the U.S. state of Montana, originates in the Canadian Rockies to the north of Glacier National Park and flows southwest into Flathead Lake, then after a journey of 158 miles (254 km), empties into the Clark Fork. The river is part of the Columbia River drainage basin, as the Clark Fork is a tributary of the Pend Oreille River, a Columbia River tributary. With a drainage basin extending over 8,795 square miles (22,780 km2) and an average discharge of 11,380 cubic feet per second (322 m3/s), the Flathead is the largest tributary of the Clark Fork and constitutes over half of its flow.