Avalanche
- Slab Width
- 12 m
- Weak Layer
- Graupel
- Trigger Type
- Natural
- Vertical Fall
- 76 m
- Avalanche Type
- Hard Slab
- Slab Thickness
- 41 cm
- Trigger Detail
- Sympathetic Release
- Start Zone Aspect
- Northwest
- Avalanche Problem
- Persistent Weak Layer
- Start Zone Elevation
- 2591 m
Noted this natural from Kessler Peak. Looks to have been triggered by either rockfall or surface sluff from above. Estimated date of Saturday release. Saturday had warmer conditions...and one could easily see drifting from Sunday's cold front on the bed surface. Weakness noted to be recrystallized graupel. Hand hardness of the slab was pencil/knife.
It should be noted that mid elevation westerly to northwesterly slopes were exceedingly weak with plenty of sandboxing noted in the weak faceted snow. Very unlikely that this would be triggered by a person....