Flathead Streamflow Graphs


Scroll down to see current streamflow for the Flathead River and tributaries, or select a station from the list. Click the “USGS” link to the right of the graphic to go to the USGS current streamflow page for that station for more information.

Flathead Lake Current Elevation

Select USGS Streamflow Readings

12355000 North Fork at Flathead BC
12355500 North Fork near Columbia Falls
12358500 Middle Fork near West Glacier
12359800 South Fork above Hungry Horse Res.
12362500 South Fork near Columbia Falls
12363000 Flathead River at Columbia Falls
12367500 Stillwater River at Lawrence Park
12366080 Whitefish River near mouth
12370000 Swan River near Bigfork
12389500 Thompson River near Thompson Falls


North Fork Flathead at Flathead, BC

  • Flow: 1840 ft³/s
  • Water Level: 6.72 ft
USGS

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North Fork near Columbia Falls, MT

  • Water Temp: 47.84 ° F
  • Flow: 7940 ft³/s
  • Water Level: 5.94 ft
USGS

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Middle Fork near West Glacier, MT

  • Flow: 7260 ft³/s
  • Water Level: 4.83 ft
USGS

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South Fork Flathead above Hungry Horse Reservoir

  • Flow: 5280 ft³/s
  • Water Level: 8.62 ft
USGS

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South Fork Flathead near Columbia Falls, MT

  • Water Temp: 50.72 ° F
  • Flow: 3440 ft³/s
  • Water Level: 6.57 ft
USGS

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Flathead River at Columbia Falls, MT

  • Water Temp: 49.82 ° F
  • Flow: 18900 ft³/s
  • Water Level: 8.41 ft
USGS

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Stillwater River at Lawrence Park

  • Flow: 646 ft³/s
  • Water Level: 4.43 ft
USGS

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Whitefish River near mouth

  • Flow: 62 ft³/s
  • Water Level: 1.67 ft
USGS

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Swan River near Bigfork, MT

  • Flow: 383 ft³/s
  • Water Level: 2.27 ft
USGS

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Thompson River near Thompson Falls

  • Flow: 593 ft³/s
  • Water Level: 3.55 ft
USGS

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