Northwest Avalanche Center

Observation: Public

All Observations

Observation Details

Name:
Enji Cooper
Observation Date:
December 15, 2022
Submitted:
December 15, 2022
Zone or Region:
West South
Activity:
XC Skiing/Snowshoeing
Location:
Pyramid Creek Environs (Pechugh Peak, Caluquhoun Peak)

Observed Avalanches

Did you observe any avalanches? 
Yes
Avalanche Type:
Wet Loose
Size:
Size 1: Relatively harmless to people
Elevation:
5k'
Aspect:
S
Comments:
Observed several few days old wet loose slides on south facing aspects of Pechugh Peak near the upper forestry road.

Signs of Unstable Snow

None reported

Observations

Snow coverage was lower depth than anticipated, but also stronger where impacted by snowshoes, snowmobiles, and truck tires.
Snowpack under/near treeline with tight tree cover on non-north facing aspects seemed to exhibit wet loose behavior (the lower SE ridge on the way up to Pechugh Peak; much of Caluquhoun Peak's snowpack).
Some hand shear tests exhibited wet cohesion on upper storm snow layers. The snow directly below the most recent storm snow seemed stout in light of the pressure our group was exerting when booting, using snowshoes, and using relative pressure tests with the butt end of my trekking pole.
Snowpack out in the open in leeward areas was powdery and deep: we kept on finding large dry/loose powder stashes which were incredibly difficult to ascend (similar to sand dunes).
We found weak sun crust on all but north facing aspects. We found deep dry loose powder/wind affected snow on north facing aspects.

Media

Heading up southwest ridge towards forestry road/Pechugh in morning. Conditions were more consolidated.
Old wet loose debris on southern aspects of Pechugh Peak
Surface hoar in shade on higher southwest-facing slope
Caluquhoun Peak: ~4.7k', west facing aspect.
Caluquhoun Peak: ~5.1k'; southeast aspect near summit.
Heading up southwest ridge from forestry road/Pechugh in evening. Conditions were closer to wet loose.

Advanced Observations

Observed Avalanche Problem #1: 
Wet Loose
Comments: 
A lot of the lower coverage/lower elevation snow under treeline was exhibiting wet loose behavior. My snowshoeing buddy and I were kicking down variable sized wet loose debris up to baseball sized rollerballs.
WordPress Lightbox