Avalanche: Cornice Ridge 3/31/2011

Observer Name:

Flygares

Observation Date:

04/01/2011

Occurrence Date:

03/31/2011

Occurrence Time:

Afternoon

Region:

Cornice Ridge
Tony Grove
Logan River
Logan

Location Name:

Cornice Ridge

Location

41° 53' 57.732" N, 111° 40' 10.6716" W

Avalanche Characteristics

Elevation:

9500'

and below

Aspect:

East

Slope Angle:

Alpha Angle:

Trigger:

Natural

Trigger: additional info:

Cornice Triggered

Repeater

Avalanche Type:

Cornice Fall

Depth (avg):

unknown

Width:

200'

Vertical:

500'

General Comments

There was a large cornice fall/avalanche on Cornice ridge yesterday (200 ft X 500 vert). The slide traveled far and fast as seen in the picture below. The toe of the slide is at the right side of the picture below and traveled over two small hills at the bottom.

General Comments 2

This picture is taken from the toe of the avalanche. The alpha angle of this slide is 18 degrees!!! The trees were still covered in snow from the powder cloud, which leads me to believe the slide occurred sometime late yesterday afternoon.

General Comments 3

Some of the chunks were huge. This was one of the bigger chunks near the bottom of the slide. It wasn’t the biggest in the slide path but it was still huge. (BTW we took these pictures at about 8:30 in the morning so things were still frozen up pretty hard and we weren’t worried about it sliding again.)

Javascript is required to view this map.