Avalanche

Avalanche: Island Lake

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Avalanche

Slab Width
76 m
Weak Layer
Facets
Trigger Type
Natural
Vertical Fall
137 m
Avalanche Type
Soft Slab
Slab Thickness
91 cm
Start Zone Aspect
Northeast
Avalanche Problem
Persistent Weak Layer
Start Zone Elevation
3322 m

This most likely released due to wind loading but there were snowmobile tracks very near so it's possible it was snowmobile triggered.