Observer Name
Robertson
Observation Date
Friday, February 7, 2025
Avalanche Date
Friday, February 7, 2025
Region
Salt Lake » Big Cottonwood Canyon » Lake Mary
Location Name or Route
Upper Mary Chutes
Elevation
9,800'
Aspect
East
Slope Angle
35°
Trigger
Skier
Trigger: additional info
Unintentionally Triggered
Avalanche Type
Soft Slab
Avalanche Problem
New Snow
Weak Layer
New Snow/Old Snow Interface
Depth
8"
Width
40'
Vertical
100'
Comments
I was the second skier to drop into the Upper Mary Chutes and triggered a graupel pocket described above. Slow moving and easy to ski off. We did not observe any signs of instability up until triggering this avalanche. While exiting around Lake Mary, however; we triggered numerous collapses. It seemed the scales tipped to Considerable around 1:30-2pm. By that time, 9" @ 1.55" SWE had fallen near the base of Brighton.
Coordinates