Lost Peak Avalanche

Location Name: 
Lost Peak
Region: 
Selkirk Mountains
Date and time of avalanche (best estimate if unknown): 
Sun, 02/07/2021 - 13:30
Location Map: 
United States
48° 28' 23.2284" N, 116° 43' 19.7112" W
See map: Google Maps
US


Red Flags: 
Whumphing noises, shooting cracks, or collapsing
Observation made by: Public
Avalanche Observations
Avalanche Type: 
Slab
Slope: 
20degrees
Trigger type: 
Snowboarder
Crown Height: 
2 ft
Aspect: 
North
Weak Layer: 
Old Snow
Avalanche Width: 
150ft.
Terrain: 
Near Treeline
Elevation: 
6 000ft.
Bed Surface: 
Old Snow
Avalanche Length: 
150ft.
Number of similar avalanches: 
2
Number of people caught: 
2
Number of partial burials: 
1
More detailed information about the avalanche: 

While skinning up north aspect, frequent whomping and settling was occurring. Changed route to low angle aspect in trees. At 6000' in a small opening in the trees, a small slide set off and partially buried one of group. This slide also set off other larger slides across the hill at same elevation. 2 ft crown on slide, down to weak layer from high elevation rainfall a few weeks ago.

Avalanche Photos: 
Weather Observations
Blowing Snow: 
No
Cloud Cover: 
25% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Calm
Precipitation: 
None
Air temperature trend: 
Cooling
Wind Direction: 
Northwest
Accumulation rate: 
More detailed information about the weather: