Observer Name
Greg Gagne
Observation Date
Thursday, December 24, 2020
Avalanche Date
Wednesday, December 23, 2020
Region
Salt Lake » Little Cottonwood Canyon » Alta Periphery » Dry Fork of AF
Location Name or Route
Dry Fork
Elevation
10,400'
Aspect
Northeast
Slope Angle
38°
Trigger
Skier
Trigger: additional info
Remotely Triggered
Avalanche Type
Hard Slab
Avalanche Problem
Persistent Weak Layer
Weak Layer
Depth Hoar
Depth
2'
Width
Unknown
Vertical
Unknown
Comments
Lots of hangfire, so wasn't able to get close to the crown or the bed surface, but was able to look on the same aspect in gentle terrain above the crown. The 1F slab on top of the depth hoar seems to have been from recent westerly wind events. Typical hard slab setup, with strong slab on top of very weak depth hoar. These can be remotely triggered from thinner spots in the snowpack.
Video