Avalanche
- Slab Width
- 46 m
- Weak Layer
- Facets
- Trigger Type
- Natural
- Vertical Fall
- 244 m
- Avalanche Type
- Soft Slab
- Slab Thickness
- 107 cm
- Start Zone Aspect
- Northeast
- Avalanche Problem
- Persistent Weak Layer
- Start Zone Elevation
- 3444 m
Likely occurred Thu during storm. 7" of new snow that day with moderate SW winds. 10" hd fallen 3 days prior. SWE for the week was .8. Trigger appeared to be a shallow wind slab release from the ridge 500' above that then ran down through storm snow in a symmetrical flow triggering the deeper, persistent slab avalanche at the convexity above the gully. Slab propagated wider further down slope and above cliffs to lookers left widening to about 200'. A few smaller slides with similar characteristics released on the face to the lookers left, then running over cliffs and triggering slabs below.
Snow has been accumulating since early Feb on top of our weak snowpack that is plagued by facets at the base. Loads have not been significant enough for a widespread cycle but similar natural activity occurred a week prior after incremental loading over a period of 5 days totaling 1.5-2" SWE.