Avalanche: South Tony Grove 12/10/2010

Observer Name:

Eric Flygare

Observation Date:

12/10/2010

Occurrence Date:

12/10/2010

Occurrence Time:

12:00pm

Region:

Logan
Logan River
Tony Grove
South Tony Grove

Location Name:

Tony Grove Sout Campground

Location

41° 53' 20.2416" N, 111° 38' 24.0684" W

Avalanche Characteristics

Elevation:

8200'

Aspect:

North

Slope Angle:

Trigger:

Snowboarder

Trigger: additional info:

Intentionally Triggered

Avalanche Type:

Soft Slab

Weak Layer:

New Snow

Depth (avg):

Width:

20'

Vertical:

30'

Snow Profile

Snow Profile Comments:

Obvious new snow instabilities on steep slopes. Extended column test showed a full propagation failure at the new snow interface (8-10 inches). No other failures were noted during the extended column test. Several failures at were observed during the compression tests as noted in the profile.

General Comments

It was a lonely day in the backcountry today. We only heard one other group of riders in the Tony area all day. Probably a good plan since it was blizzard conditions up high. We made several runs up high but the wind blew us away. We moved into more protected terrain where we found great turning conditions. The new snow did not bond well to the old snow and we set loose multiple avalanches on steep (38+ degree slopes)

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