Avalanche: Humpy Bowl

Observer Name
Ted Scroggin
Observation Date
Saturday, December 17, 2022
Avalanche Date
Friday, December 16, 2022
Region
Uintas » Humpy Bowl
Location Name or Route
Humpy Peak
Elevation
10,100'
Aspect
Northeast
Slope Angle
35°
Trigger
Snowmobiler
Avalanche Type
Hard Slab
Avalanche Problem
Persistent Weak Layer
Weak Layer
Facets
Depth
4'
Width
125'
Vertical
400'
Comments
Noticed this avalanche from the highway as the morning sun lit up the slope. Not sure on some of the details, but visiting with two different groups who were riding in the area yesterday, they both mentioned they did not notice the slope had avalanched during the afternoon. I'm guessing it may have happened late in the afternoon and it sure looks to be sled triggered with tracks going into the slide from both the top and from the side. The avalanche failed on the November weak sugary snow and is 2-4' deep. Interesting that in some places the avalanche broke down at the ground level exposing rocks and bushes. This slope fits the characteristic of other avalanches in the surrounding area. It is wind loaded and on the north side of the compass.
Comments
Grabbed this photo of some new snow sluffing on a nearby slope.
Coordinates