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Avalanche: Tab Hollow 2/15/2010

Observer Name:

Erik Syrstad

Observation Date:

02/15/2010

Occurrence Date:

02/15/2010

Occurrence Time:

Morning

Region:

Logan
Logan River
Tab Hollow

Location

41° 47' 4.4196" N, 111° 41' 11.3892" W

Avalanche Characteristics

Elevation:

8500'

Aspect:

North

Northeast

Slope Angle:

Trigger:

Skier

Trigger: additional info:

Unintentionally Triggered

Remotely Triggered

Sympathetic Release

Avalanche Type:

Soft Slab

Weak Layer:

Surface Hoar

Depth (avg):

18"

Depth Range:

12" to

Width:

100'

Width Range:

100' to

150'

Vertical:

Unknown

Vertical Range:

300' to

500'

General Comments

The first was remotely (and unexpectedly) triggered from a ridge at 8550'. NE facing, about 30 degrees at the very steepest.

General Comments 2

We kicked off hangfire at the ridge and took a look at the crown, which consisted of medium density wind-drifted snow, not very stiff. Weak layer was a very thin layer of surface hoar. Just seconds before triggering the slab, we dropped the cornice shown in image #2, with no results other than surface sluffing. The slope under the cornice was steeper and more north facing than the one which was remotely triggered… go figure.

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