Date and Time of Avalanchesort ascending Avalanche Type Trigger Size Starting Elevation Aspect Number of avalanches
12/20/2020 - 09:30
Forecaster Observation: Whitefish Mountain Resort
Soft Slab Skier
Intentionally Triggered
D2 , R2 6600 Northeast 3
12/20/2020 - 09:15
Forecaster Observation: Whitefish Mountain Resort
Soft Slab Skier
Intentionally Triggered
D1 , R1 Above 6,500 ft Northeast 3
12/20/2020 - 09:15
Forecaster Observation: Whitefish Mountain Resort
Soft Slab Skier
Intentionally Triggered
D1.5 , R2 Above 6,500 ft Northeast 2
12/20/2020 - 05:00
Marion Lake
Soft Slab Unknown D2 Between 5,000 and 6,500 ft Northwest 1
12/20/2020 - 01:00
Swan Range
Soft Slab Natural D2 , R3 6900' Northeast 1
12/20/2020 - 00:30
Standard Peak Zone
Soft Slab Natural D2 , R3 6200' Southeast 2
12/19/2020 - 14:15
WMR sidecountry
Soft Slab Skier D2 , R2 Between 5,000 and 6,500 ft Northeast 1
12/17/2020 - 12:00
Forecaster Observation: Southern Whitefish Range
Soft Slab Skier D1 Above 6,500 ft Northeast 3
12/17/2020 - 12:00
Southern Whitefish Range
Soft Slab Skier
Intentionally Triggered
D2 , unknown Between 5,000 and 6,500 ft Southwest 1
12/16/2020 - 20:00
Forecaster Observation: Southern Whitefish Range
Hard Slab Unknown D1 Above 6,500 ft Northeast 1
12/16/2020 - 12:00
Forecaster Observation - Flathead Range
Soft Slab Skier
Intentionally Triggered
D1 , R1 Above 6,500 ft Northeast 1
12/16/2020 - 12:00
Canyon Creek
Soft Slab Skier D1 1
12/15/2020 - 13:15
Forecaster Observation - Central Swan Range
Loose Dry/ Sluff Skier
Intentionally Triggered
D1 , R1 Between 5,000 and 6,500 ft Northeast 1
12/15/2020 - 12:30
Forecaster Observation - Central Swan Range
Soft Slab Skier
Intentionally Triggered
D1 , R1 Above 6,500 ft Northeast 2
12/12/2020 - 14:15
Forecaster Observation: Ten Lakes
Loose Dry/ Sluff Skier
Intentionally Triggered
D1 , R1 7300' Northwest 1
12/09/2020 - 17:00
Forecaster Observation - Flathead Range
Loose Dry/ Sluff Natural D1 , R1 Above 6,500 ft East 3
12/09/2020 - 13:00
Forecaster Observation: Lake McDonald Area
Soft Slab Natural D2 , R2 Above 6,500 ft East 1
12/09/2020 - 10:00
Forecaster Observation: Middle Fork
Wet Loose Natural D1.5 , R1 Between 5,000 and 6,500 ft Northeast 6
12/08/2020 - 14:00
Center Gully, Mt. Brown.
Wet Loose Natural D1 1
12/08/2020 (All day)
Middle Fork
Wet Loose Natural D1.5 , R2 Between 5,000 and 6,500 ft Northwest 1

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