Avalanche: Mt Aire 2/27/2010

Observer Name: 
Culberson
Observation Date: 
02/27/2010
Occurrence Date: 
02/27/2010
Occurrence Time: 
Unknown
Region: 
Mt Aire
Parleys Canyon
Salt Lake
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Avalanche Characteristics
Elevation: 
8200'
Aspect: 
Northeast
Trigger: 
Skier
Trigger: additional info: 
Unintentionally Triggered
Avalanche Type: 
Soft Slab
Depth (avg): 
15"
Width: 
Unknown
Vertical: 
800'
General Comments

We had seen three skier released slides from the day before and 5 naturally
released slides (3 norht facing - 2 east facing) on the way up Mt Aire.
About 9:30 am, two of us were looking down the three north facing gullies
just below the summit (@ 8350ft) on Mt Aire. The two western most gullies
had slid naturally creating a crown line that extended across the gully up
on the western rocky side and then went extended all the way down the side
wall of the gully for 800vertical feet. The gullies went completely with
substantial debris at the bottom - each gully is slightly more than 30
degrees and pretty much true north facing.

The eastern most of the three is the shallowest and least steep - 30 degrees
or just under. The evidence was obvious and suggested (loudly) that the
hazard was considerable (just as your report indicated). I had skied the
center gully on Tuesday , the day before the most recent storm, and all the
gullies many times. With a good spotter, I ski cut fairly deeply into and
across the gully - nothing - the snow had not bonded to itself or the layer
about 1 foot down. Three careful turns just skier's right of center and it
felt OK - on my seventh turn the gully broke above me at turn three (50 feet
up) propagating rib to rib with about a 12-18 inch crown - - I saw the
rippling of snow buildup as I skied and my partner yelled to ski out right.
- all was good as I skied our right and watched the gully run 800 vertical
and sieve through the aspen copse at the bottom.
Complacency due to familiarity - I was careful with what I did, but that it
ran was really a no-brainer. I have skied 10 out of the last 15 days and
have been paying attention - I thought.
Nice forecast - you are right on.
Thanks for your good work.
Cheers


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