Avalanche: Porter Fork 2/21/2010

Observation Date: 
02/21/2010
Occurrence Date: 
02/21/2010
Occurrence Time: 
Unknown
Region: 
Salt Lake
Mill Creek Canyon
Porter Fork
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Avalanche Characteristics
Elevation: 
8600'
Aspect: 
West
Trigger: 
Skier
Trigger: additional info: 
Intentionally Triggered
Avalanche Type: 
Soft Slab
Weak Layer: 
Surface Hoar
Depth (avg): 
2'
Width: 
50'
Vertical: 
150'
General Comments

After out last run as we were headed down We came to a west facing slope at 8600 ft.  It had been skied at least 6 times but was suspect because of the aspect and the fact that it was 37-38 degrees.  A woman had just skied it about an hour before us.  When I cut the slope a pocket popped out about 50 ft wide and two feet deep. It ran 100 to 150 feet.

The wind was very light.  Off the ridge at about 9500 feet there were some old, hard pillows.  We avoided these so I have no comment.

Surface was 6" of very light "ego" powder on top of increasingly dense layers with the surface hoare at about 2 feet.

I thought the snow pack was "healing" but there are obviously still major problems in certain places.

You guys have obviously identified the problem and the dailey discussion on your website is right on.  The hard thing for us skiers is standing on top of an 800 foot run of what looks to be perfect powder and turning back.


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