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Observer Name: 
Steve Cote
Observation Date: 
Thursday, December 3, 2015
Occurrence Date: 
Monday, November 30, 2015
Occurence Time: 
Unknown
Region: 
Big Drift/Skyline Summit
Location Name or Route: 
Big drift
Elevation: 
9700
Aspect: 
Northeast
Slope Angle: 
37
Trigger: additional info: 
Unintentionally Triggered
Avalanche Type: 
Soft Slab
Avalanche Problem: 
Wind Slab
Weak Layer: 
Facets
Depth: 
1"
Width: 
15
Vertical: 
20
Comments: 

Looks like it was triggered by a snowmobile, just at the break of the ridge, Last weeks observations found that the old snow had faceted and we got a release of the of a small slab, much the same.

FORECASTER NOTE:  This may have been snowmobile triggered or may have released naturally.  I saw a similar cornice fall that fell naturally from recent wind loading.  However, I also experienced a collapse of the snowpack under my machine in a drifted area.  The collapse was due to the new drift sitting on old faceted (sugary) weak snow.  Brett Kobernik

Coordinates: 
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