Date and Time of Avalanchesort descending Avalanche Type Trigger Size Starting Elevation Aspect Number of similar avalanches
Snowslip Mountain/Burnout avalanche path Soft Slab Natural D2.5 , R3
Going to the Sun Road Glide Natural D2.5 , R3 Above 6,500 ft Northeast 3
Going to the Sun Road Wet Slab Natural
Cornice Fall Triggered
D2 , R2 Above 6,500 ft Northeast 3
Going to the Sun Road Wet Loose Natural D2 Above 6,500 ft South 10-20
Siyeh Bend/East face Piegan Mtn.
Forecaster Observation - Cascade drainage, Flathead Range
Great Northern
11/22/2017 - 17:45
Forecaster Observation - Skiumah Lake, Flathead Range
Unknown Natural D2.5 , R3 Above 6,500 ft North 5-10
11/22/2017 - 21:30
Forecaster Observation - Rescue Creek, Flathead Range
Unknown Natural D2 Above 6,500 ft 5-10
12/02/2017 - 17:15
Forecaster Observation - Skiumah Lake, Flathead Range
Hard Slab Natural D2 , R2 Above 6,500 ft North 1
12/09/2017 - 13:00
Forecaster Observation - Mt. Stanton, Glacier National Park
Wet Loose Natural D1.5 , R1 Above 6,500 ft South 10-20
12/09/2017 - 13:30
Forecaster Observation - Mt. Thompson-Seton, Whitefish Range
Loose Dry/ Sluff Skier
Intentionally Triggered
D1 , R1 Above 6,500 ft Northeast 1
12/10/2017 - 14:15
Forecaster Observation - Mt. Stanton, Glacier National Park
Loose Dry/ Sluff Skier
Intentionally Triggered
D1 , R1 Above 6,500 ft Northeast
12/14/2017 - 13:15
Forecaster Observation - Little Matterhorn, Glacier National Park
Loose Dry/ Sluff Skier
Intentionally Triggered
D2 , R1 7000 Northeast
12/16/2017 - 13:00
Forecaster Observation - Rescue Creek, Flathead Range
Loose Dry/ Sluff Skier
Intentionally Triggered
D1 , R1 Above 6,500 ft Northeast 3
12/18/2017 - 12:15
Canyon Creek, southern Whitefish Range
Soft Slab Natural D1
12/19/2017 - 08:15
Forecaster Observation - Ghoulie Ridge, Whitefish Range
Soft Slab Natural D1.5 , R1 Between 5,000 and 6,500 ft Northeast 2
12/19/2017 - 13:00
Forecaster Observation - Ghoulie Ridge, Whitefish Range
Soft Slab Natural D2 , R2 Between 5,000 and 6,500 ft South 3
12/19/2017 - 13:30
Forecaster Observation - Ghoulie Ridge, Whitefish Range
Soft Slab Natural D1 , R1 Between 5,000 and 6,500 ft 10-20
12/19/2017 - 15:45
Forecaster Observation - Middle Fork Corridor
Soft Slab Natural D1.5 , R1 Below 5,000 ft 10-20

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