Avalanches Near Andesite Peak

Location Name: 
Andesite Peak
Region: 
Donner Summit Area
Date and time of avalanche (best estimate if unknown): 
Tue, 01/03/2017 - 12:00
Location Map: 
United States
39° 20' 59.3844" N, 120° 21' 55.5012" 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
Obvious avalanche path
Observation made by: Forecaster
Avalanche Observations
Avalanche Type: 
Dry
Slab
Slope: 
38degrees
Trigger type: 
Natural
Crown Height: 
1 ft
Aspect: 
East
Avalanche Width: 
40ft.
Terrain: 
Near Treeline
Elevation: 
8 100ft.
Avalanche Length: 
100ft.
More detailed information about the avalanche: 

Natural wind slab avalanche observed late morning near the summit area of Andesite Peak in a corniced wind loaded location.  Shooting cracks observed in terrain near the avalanche.  Avalanche estimated at coordinates provided.  Video showing a small slab avalanche intentionally kicked off in wind loaded terrain near treeline at 8000'.  Strong to gale force winds continued throughout the day with plenty of snow available for transport.

Avalanche Photos: 
Avalanche observation video: 

20170103

Weather Observations
Blowing Snow: 
Yes
Cloud Cover: 
100% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Strong
Precipitation: 
Snow
Air temperature trend: 
Warming
Wind Direction: 
Southwest
Accumulation rate: 
Less than 1 in. per hour