Northwest Avalanche Center

Observation: Public

All Observations

Observation Details

Name:
Ben J
Observation Date:
February 7, 2021
Submitted:
February 7, 2021
Zone or Region:
Snoqualmie Pass
Activity:
Skiing/Snowboarding
Location:
east slopes of cave ridge 4100 ft elevation

Signs of Unstable Snow

None reported

Observations

Results of compression test on 35 degree mostly open eastward slope: CTH21 sudden collapse on presumed 2/4 crust layer ~0.5 m down. 1/13 layer was unreactive during compression test but yielded a planar break when pulling hard behind the column with shovel.

Media

route with flag marking location of compression test
mid test after sudden collapse on presumed 2/4 crust
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