Avalanche: North Castle Rock 3/31/2011

Observer Name:

Flygares

Observation Date:

04/01/2011

Occurrence Date:

03/31/2011

Occurrence Time:

Afternoon

Region:

North Castle Rock
Tony Grove
Logan River
Logan

Location Name:

Castle Rock

Location

41° 54' 16.2468" N, 111° 40' 15.7692" W

Avalanche Characteristics

Elevation:

9500'

and below

Aspect:

East

Slope Angle:

Alpha Angle:

Trigger:

Natural

Trigger: additional info:

Cornice Triggered

Avalanche Type:

Wet Slab

Depth (avg):

2.5'

Width:

300'

Vertical:

600'

General Comments

There was another big slide just North of Castle Rock. It looks like it was triggered by a cornice fall but it released a slab approximately 300 feet wide and ran 600 vertical. The slab looked like it failed on the dirty layer from the storm a couple of weeks ago. There were not large chunks of cornice in the debris like on the Cornice Ridge slide. I am guessing the cornice fall was not as large as the Cornice Ridge slide. The alpha angle on this slide was 22 degrees.

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