Observation: Avalanche Professional
Basic Information
Observation Details
Observation Date:
December 31, 2021Submitted:
December 31, 2021Observer:
Avalanche Professional - Shane RobinsonZone or Region:
Snoqualmie PassLocation:
Humpback Mountain (N, NE, E. 2000-4500')Signs of Unstable Snow
Recent Avalanches?
YesCracking?
None ExperiencedCollapsing?
None ExperiencedAdvanced Information
Weather Summary
Cloud Cover:
Mostly CloudyWind:
CalmNew/Recent Snowfall:
Approximately 10" of new snow.Lower cloud ceiling at about 4000' limiting solar input below that, with clearing happening in the pm. We left the field at 1 pm.
Avalanche Observations
| # | Date | Location | Size | Type | Bed Sfc | Depth | Trigger | Photos | Details |
|---|---|---|---|---|---|---|---|---|---|
| 20 |
Dec 30, 2021 () |
Snoqualmie Pass N ft |
D1.5 | SS-Soft Slab | N-Natural | Report |
A widespread natural cycle had occurred yesterday with some debris over 1000' below the start zones.
Snowpack Observations
A generally right-side-up snowpack in the upper snowpack. Plenty of snow for easy travel from I-90 through the woods. 180cm HS at 3000' ENE aspect with a stout crust 95cm down. A very thin rime crust above 3800' on east aspects.