Valanga

Avalanche: West Willow

Mark B.Salt Lake
Vedi sulla mappa

Avalanche

Slab Width
9 m
Weak Layer
Density Change
Trigger Type
Skier
Vertical Fall
18 m
Avalanche Type
Soft Slab
Slab Thickness
30 cm
Trigger Detail
Remotely Triggered
Start Zone Aspect
Northeast
Avalanche Problem
Persistent Weak Layer
Start Zone Elevation
2804 m

Remotely trigered two soft slabs while walking up West Willow Ridge. Both slides appeared to be at the new/old snow interface; but did not investigate. The first slide was accompanied with a very large womph. The entire slope appeared to settle. The actual slide was pretty small.

FORECASTER NOTE: This sounds suspiciously like the early January facets are the culprit here. It has the right aspect and elevation to have preserved weak snow just under the new snow. The "whoomph" also OFTEN accompanies the collapse of a persistent faceted weak layer. Kobernik