Northwest Avalanche Center

Observation: Public

All Observations

Observation Details

Name:
Matt Primomo
Observation Date:
February 20, 2021
Submitted:
February 20, 2021
Zone or Region:
Stevens Pass
Activity:
Skiing/Snowboarding
Location:
Henry Crk Clearcuts

Observed Avalanches

Did you observe any avalanches? 
Yes
Avalanche Type:
Size:
Elevation:
Aspect:
Comments:
Observed recent (2/16) shallow storm slab cycle in many of the paths on the south side of Rock Mtn just west of Berne. These ran as D2.5's to the upper/mid runout zones.
The Swath appeared to have run as a D3 around that date as well.

Signs of Unstable Snow

None reported

Observations

Slow and subtle warming trend observed during the day. Graupel fell over stellars at times. Light transport BTL, moderate sustained winds and transport higher.

NW at 4,000ft in Henry Crk Clearcuts: HS 163cm. Intentionally targeted shallower zone.
13cm down (2/18): TTE
50cm down (2/11): CTH SP
105cm down (mid-Jan): CTM SC, DTTM SC, PST 25/100 (End).
Note: This is the lowest PST score I've had in a couple weeks on this layer.

Media

Closeup of the faceted melt forms from weak layer within facet/crust complex, 105cm down.
WordPress Lightbox