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Observer Name: 
Hardesty, Chenoweth, Falley
Observation Date: 
Wednesday, December 11, 2013
Occurrence Date: 
Wednesday, December 11, 2013
Occurence Time: 
1:00pm
Region: 
Snowbasin Backcountry
Location Name or Route: 
Snowbasin periphery
Elevation: 
7200
Aspect: 
Northeast
Slope Angle: 
42
Trigger: 
Skier
Trigger: additional info: 
Intentionally Triggered
Avalanche Type: 
Soft Slab
Avalanche Problem: 
Persistent Slab
Weak Layer: 
Facets
Depth: 
16"
Width: 
40
Vertical: 
60
Comments: 

Steep rollover at 7200' in uncompacted terrain.  Cracking noted in similar terrain. This slab had no wind effect and just enough cohesion to propagate 40' wide and 16" deep.  Weakness was 1mm facets sitting just above an inch thick temperature crust.  

Total snowpack there was 2-2.5'.  

Very poor snowpack structure - 12" new above 4" very weak cohesionless squares above a 1" thick temp crust - as well described by Evelyn here the day before.  Any significant storm at this elevation would produce a significant avalanche cycle.  Unfortunately, the weather forecast looks a bit grim.  

Coordinates: 
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