Observer Name
ZG
Observation Date
Tuesday, February 11, 2020
Avalanche Date
Sunday, February 9, 2020
Region
Salt Lake » Big Cottonwood Canyon » First Cornice Bowl
Location Name or Route
Guardsmans pass/ first cornice
Elevation
9,600'
Aspect
East
Trigger
Snowmobiler
Trigger: additional info
Unintentionally Triggered
Avalanche Type
Hard Slab
Avalanche Problem
Wind Drifted Snow
Weak Layer
Density Change
Depth
2'
Width
300'
Comments
I Saw this slide from afar, decided to go take a closer look. I'm guessing it happened on sat(2/8) or sun(2/9) after new snow and strong wind event. It Appeared to have been triggered by a snowmobiler ascending the slope. There were no sled tracks on bed surface. observed snowmobile track peeling out near the top of ridge. Triggered in thinner area, 2' deep but propagated down slope and the crown was easily 4-5' deep 300'w running well over 500'. It appeared to have been a close call.
Coordinates