Avalanche: Slide Canyon 11/28/2010

Observer Name: 
Hardesty, Wagner, Nalli 1
Observation Date: 
11/29/2010
Occurrence Date: 
11/28/2010
Occurrence Time: 
Unknown
Region: 
Provo
Provo Canyon
Slide Canyon
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Location

40° 21' 54.666" N, 111° 36' 43.4952" W
Avalanche Characteristics
Elevation: 
9100'
Aspect: 
East
Trigger: 
Natural
Avalanche Type: 
Hard Slab
Weak Layer: 
Graupel
Depth (avg): 
2'
Width: 
35'
Vertical: 
Unknown
General Comments

 Two naturals noted...the lower one looked like it ran at the end, or just after, Sunday's storm.  Edges looked sharp with little to no new snow.  Based upon the holes we dug in the snow, we felt that the 'recrystallized' graupel was the weakness.  It was evident in our pits and seemed a likely spot where graupel would pool from the slope into the gully - where both slides released.  

 

The one below may or may not have been triggered by sluffs from above.  The thing is, the sluffs looked like they had a couple inches of new snow on them whereas the hard slab did not.  

PB290020.JPG
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