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Observation Date: 
Wednesday, March 7, 2018
Occurrence Date: 
Wednesday, March 7, 2018
Occurence Time: 
Afternoon
Region: 
Cold Water Canyon
Location Name or Route: 
Technicolor
Elevation: 
8400
Aspect: 
North
Slope Angle: 
Unknown
Trigger: 
Skier
Trigger: additional info: 
Unintentionally Triggered
Avalanche Type: 
Soft Slab
Avalanche Problem: 
Persistent Slab
Weak Layer: 
Facets
Depth: 
2'
Width: 
Unknown
Vertical: 
Unknown
Snow Profile Comments: 

Snow profile from 3/8 in Hell's Canyon, not far from the avalanche site.

Comments: 

A dangerous persistent slab avalanche was triggered by skiers who entered the backcountry from the ridge accessed by Snowbasin's Allen Peak Tram.  The local skiers promply reported the avalanche to the Snowbasin Patrol, and said that the entire Technicolor path "cleaned out."  Thankfully nobody was caught, since the dangerous avalanche traveled quite a ways out of sight down into Cold Water Canyon. 

We decided not to venture into the site of the avalanche because of widespread poor snowpack structure in the area and the potential of triggering another avalanche.  Sorry that more details and photos of the avalanche are not available.

A weak layer consisting of very loose, sugary, faceted snow from December has plagued the area all winter, and it is obviously still reactive.  Snowpit tests in nearby Hell's Canyon showed moderately unstable snow and tendency for full propagation on the faceted layer. 

Coordinates: 
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