Observer Name
C Johnson
Observation Date
Thursday, April 28, 2016
Avalanche Date
Thursday, April 28, 2016
Region
Salt Lake » Little Cottonwood Canyon » Alta Ski Area » Pt. Supreme
Location Name or Route
Alta - Supreme/Sidewinder
Elevation
10,300'
Aspect
Northeast
Slope Angle
38°
Trigger
Skier
Trigger: additional info
Unintentionally Triggered
Avalanche Type
Soft Slab
Avalanche Problem
Wet Snow
Weak Layer
New Snow/Old Snow Interface
Depth
5"
Width
450'
Vertical
400'
Comments
After the skier entered the narrow part of the run and made a turn on the wider section the new storm released above the skier. The skier was able to to ski out of path of the avalanche. The crown was only 5" but propagated roughly 450' wide. The debris pile was about 4' deep at the bottom. There was no evidence of wind slab and this was clearly the new snow/old snow interface. No one was caught or buried.
Coordinates