Northwest Avalanche Center

Observation: Public

All Observations

Observation Details

Name:
Mallorie Estenson
Observation Date:
February 24, 2021
Submitted:
February 24, 2021
Zone or Region:
Stevens Pass
Activity:
Skiing/Snowboarding
Location:
Yodelin

Observed Avalanches

Did you observe any avalanches? 
Yes
Avalanche Type:
Wet Loose
Size:
Size 2: Could bury, injure, or kill a person
Elevation:
Below Treeline (Estimated 3k)
Aspect:
S
Comments:
Observed wet loose avalanche on Skyline Ridge, D2-R2, with AIARE Women's ITC.

Signs of Unstable Snow

None reported

Observations

We skied around Yodelin from 10am to 3pm. Spent most of the day in pits practicing skills, but were able to get some nice soft turns in on non-solar aspects. Observed little evidence of wind transport, but did manage to ID a near-surface slab in the snow that has fallen since the Sunday/Monday rain event.

In a snowpit observation and CT, we observed weak interface between layers of the recent snowfall from the last 72 hours and the previous storm cycle with notable changes in hand hardness at 25cm, 65 cm, and 85m from the snow surface. Slab formation is developing in the upper layers and this sits on top of a very wet layer of about 20 cm; generally the top of the snowpack seems to be right-side-up. Our pit depth was around 150cm.

Wet forms 20cm thick 65-70cm from surface.
Did not dig deep enough to ID the mid-January crust layer.
Many large crowns visible across the road on W,S,E aspects at Stevens Pass. Likely that these ran on the Jan crust layer.

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