Avalanche: Lower Cornice Ridge Area 3/10/2011

Observer Name:

Eric Flygare

Observation Date:

03/10/2011

Occurrence Date:

03/10/2011

Occurrence Time:

Unknown

Region:

Logan
Logan River
Tony Grove
Lower Cornice Ridge Area

Location Name:

unknown

Avalanche Characteristics

Elevation:

9200'

Aspect:

North

Trigger:

Snowboarder

Trigger: additional info:

Unintentionally Triggered

Avalanche Type:

Hard Slab

Depth (avg):

12"

Width:

40'

Width Range:

30' to

50'

Vertical:

100'

General Comments

The picture below shows a hard slab that released on a steep north facing slope at about 9200 feet. The fracture occurred as I traversed across a wind loaded slope and propagated in front of me for at least 30 feet. The 1 foot deep slab released and slid an hundred feet or so but did not step down into lower layers.