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Avalanche: Lake Creek 12/18/2009

Observer Name:

Grant Helgeson

Observation Date:

12/18/2009

Occurrence Date:

12/18/2009

Occurrence Time:

Unknown

Region:

Lake Creek
Huntington Canyon
Skyline

Location

39° 34' 15.8736" N, 111° 17' 9.9456" W

Avalanche Characteristics

Elevation:

9900'

Aspect:

East

Slope Angle:

Trigger:

Natural

Avalanche Type:

Soft Slab

Weak Layer:

Facets Below Crust

Depth (avg):

Width:

100'

Vertical:

350'

Snow Profile

Snow Profile Comments:

Very unusual faceted crust, facets, faceted crust "sandwich." A series of failures stepped down to the critical failure just above the faceted crust at the ground.

General Comments

This structure is present on high elevation East & North aspects. We have all the ingredients for slab avalanches in place; str

Video 1:

General Comments 2

Crust, entirely made of 3 - 5mm mature facets. (No necks visible.)

General Comments 3

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