Date and Time of Avalanche![]() |
Avalanche Type | Trigger | Size | Starting Elevation | Aspect | Number of avalanches |
---|---|---|---|---|---|---|
11/17/2020 - 14:30 Forecaster Observation - Swan Range |
Wet Loose | Natural | D2 , R1 | Between 5,000 and 6,500 ft | Southwest | 2 |
11/17/2020 - 12:00 Sperry Chalet Basin |
Wet Loose | Natural | D2 , R2 | Above 6,500 ft | Southwest | 1 |
11/17/2020 - 11:00 Grant Ridge |
Wet Loose | Natural | D1 , R1 | Above 6,500 ft | Southeast | 1 |
11/12/2020 - 12:45 Snyder Lake - GNP |
Loose Dry/ Sluff | Natural | D1.5 | Northwest | 1 | |
11/12/2020 - 12:00 Forecaster Observation - Flathead Range |
Soft Slab |
Skier
Intentionally Triggered |
D1 , R1 | Between 5,000 and 6,500 ft | North | 3 |
10/26/2020 - 12:15 Firebrand Pass Area |
Hard Slab | Natural | D2 | Above 6,500 ft | East | 2 |
10/19/2020 - 14:45 Going-to-the-Sun Road |
Unknown | Natural | D1.5 | Above 6,500 ft | Southwest | 1 |
05/03/2020 - 12:15 Flathead Range |
Hard Slab |
Natural
Cornice Fall Triggered |
D2 , R2 | 6900' | Northeast | 1 |
05/03/2020 - 00:45 Flathead Range |
Soft Slab | Natural | D1.5 , R1 | 7200' | Northeast | 1 |
04/22/2020 - 12:15 North Swans, S of Hash mtn, N of Strawberry mtn |
Glide | Natural | D3 , R3 | 6250 | Southwest | 1 |
04/20/2020 - 12:15 Flathead Range |
Wet Loose | Natural | D2 , R2 | Between 5,000 and 6,500 ft | Southeast | 2 |
04/20/2020 - 12:00 Flathead Range |
Wet Loose | Natural | D1.5 , R2 | Between 5,000 and 6,500 ft | Southeast | 5 |
04/20/2020 - 12:00 Flathead Range |
Wet Loose | Natural | D1.5 , R2 | Northeast | 4 | |
04/19/2020 - 11:00 Forecaster Observation - Flathead Range |
Wet Loose |
Skier
Intentionally Triggered |
D2 , R2 | Above 6,500 ft | Northwest | 2 |
04/18/2020 - 16:30 Forecaster Observation - Flathead Range |
Soft Slab | Natural | D2 , R2 | Above 6,500 ft | 4 | |
04/18/2020 - 15:30 Big Mountain |
Soft Slab | Skier | D1 | East | 1 | |
04/18/2020 - 13:30 Forecaster Observation - Flathead Range |
Loose Dry/ Sluff | Natural | D1.5 | Above 6,500 ft | 10 | |
04/16/2020 - 16:00 Flathead Range |
Wet Loose | Natural | D1.5 , R2 | Between 5,000 and 6,500 ft | Northwest | 1 |
04/16/2020 - 15:00 Forecaster Observation - Central Swan Range |
Wet Loose | Skier | D1 , R2 | Above 6,500 ft | Southwest | 2 |
04/16/2020 - 14:00 Flathead Range |
Wet Loose | Natural | D1.5 , R1 | Between 5,000 and 6,500 ft | Northeast | 4 |