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Avalanche: Cave Hollow 2/6/2010

Observer Name:

Joshua..2-6-2010, Toby Weed...2-8-2010

Observation Date:

02/06/2010

Occurrence Date:

02/06/2010

Occurrence Time:

Unknown

Region:

Richards Hollow
Left Hand Fork-Blacksmith Fork
Logan
Cave Hollow

Location

41° 41' 54.3228" N, 111° 41' 35.952" W

Avalanche Characteristics

Elevation:

8900'

Aspect:

East

Slope Angle:

Alpha Angle:

Trigger:

Snowmobiler

Trigger: additional info:

Unintentionally Triggered

Remotely Triggered

Avalanche Type:

Hard Slab

Weak Layer:

Facets

Depth (avg):

Depth Range:

2' to

Width:

700'

Width Range:

600' to

900'

Vertical:

600'

Vertical Range:

500' to

700'

Snow Profile

Snow Profile Comments:

Very broad HS crown. P-hard to F at top of slab failed on small facets <1mm around 40 cm above ground, washed out depth hoar (larger 3-4mm facets on ground...

General Comments

Triggered by three snowmobiles. No one caught (i.e. all were 30 yards south of the break when it happened and they rode out

Video 1:

General Comments 2

General Comments 3

The avalanche dumped a huge amount of snow into a debris pile at the bottom of the bowl that you could have fit several football fields into.... I'm glad no one was caught in this thing!

General Comments 4

The broad crown stretches out of the photo on either side. You can see where the avalanche stepped into depth hoar on the ground in the middle of the avalanche....

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