Avalanche in Selkirks

Location Name: 
Lost Creek Drainage
Region: 
Selkirk Mountains
Date and time of avalanche (best estimate if unknown): 
Sun, 02/07/2021 - 10:45
Location Map: 
United States
48° 28' 57.8928" N, 116° 42' 13.5936" W
See map: Google Maps
US


Red Flags: 
Recent avalanche activity
Whumphing noises, shooting cracks, or collapsing
Recent loading by new snow, wind, or rain
Observation made by: Public
Avalanche Observations
Avalanche Type: 
Slab
Slope: 
30degrees
Trigger type: 
Snowboarder
Crown Height: 
3 ft
Aspect: 
Northwest
Weak Layer: 
Old Snow
Avalanche Width: 
40ft.
Terrain: 
Near Treeline
Elevation: 
5 800ft.
Bed Surface: 
Old Snow
Avalanche Length: 
150ft.
More detailed information about the avalanche: 

Widespread collapsing and whumfing was observed on all aspects in upper elevations. 

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: 
None
More detailed information about the weather: