Observer Name
Stevens-Diamond S, Kobernik
Observation Date
Thursday, February 18, 2021
Avalanche Date
Thursday, February 18, 2021
Region
Skyline » Manti Canyon » Middle Fork
Location Name or Route
Middle Fork Manti Canyon
Elevation
10,100'
Aspect
Northeast
Trigger
Snowmobiler
Trigger: additional info
Remotely Triggered
Avalanche Type
Soft Slab
Avalanche Problem
Persistent Weak Layer
Weak Layer
Facets
Depth
2.5'
Width
450'
Vertical
200'
Comments
Snowmobile riders were taking a break and watched this avalanche release 200 to 300 yards away from them. It is most likely they caused the snowpack to collapse which then traveled through the snow and up the slope. It is very common for a layer of weak faceted snow buried within the snowpack to behave like this.
Coordinates