Wind Slab Avalanches on Andesite

Location Name: 
Andesite Ridge
Region: 
Donner Summit Area
Date and time of avalanche (best estimate if unknown): 
Sun, 11/27/2016 - 07:00
Location Map: 
United States
39° 21' 3.6396" N, 120° 21' 56.8152" 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: Guide at Tahoe Mountain School
Avalanche Observations
Avalanche Type: 
Dry
Slab
Slope: 
38degrees
Trigger type: 
Natural
Crown Height: 
1 ft
Aspect: 
Northeast
Weak Layer: 
Unknown
Terrain: 
Above Treeline
Elevation: 
8 100ft.
Bed Surface: 
Unknown
Avalanche Length: 
150ft.
Number of similar avalanches: 
3
More detailed information about the avalanche: 

3 natural wind slabs on Andesite. Largest one D2 (large enough to bury a person). 150' long and running into trees. All 1' crown lines.