Avalanche Occurrence

View Associated Field Report

This was triggered as a stiff wind pillow. It started out small, but entrained a significant amount of snow as it traveled down slope.

Observer:

SAC Forecaster

Verified by SAC?

Yes

Occurrence Date:

Dec 17, 2020 (+/- 1 day)

Location:

McDonald

# of Avys:

5

Aspect:

N

Start Zone Elev:

9000ft

Size:

D1.5

Type:

SS-Soft Slab

Trigger:

AC-Cornice Drop

Comments:

Soft slab/cornice chunks entraining debris and picking up speed quickly.

This was triggered as a stiff wind pillow. It started out small, but entrained a significant amount of snow as it traveled down slope.

This avalanche was triggered by a cornice. It started out small, but entrained a significant amount of snow as it traveled down slope. You can see the powder cloud in the trees near the bottom of the slope.