Date of Observation: 12/08/2021
Name: Zach Guy
Zone: Northwest Mountains
Route Description: Quick morning tour in the Upper Slate, traveled on East to North facing aspects to 12,000 ft.
Observed avalanche activity: Yes
Avalanches: Skier triggered a few shallow wind slabs on crossloaded northeast aspects near and above treeline. Slabs were up to 10” thick, didn’t run far, and failed on the Dec 6 facet layer.
Weather: Light winds, clouds increased to overcast by 10 am. Very light snowfall started at 11 on our way out.
Snowpack: The few inches of Tuesday nights snow started faceting overnight, and is currently not bonded well to underlying melt freeze crusts. Thus, I expect aspects with a crusty 12/6 interface to be problematic with this incoming storm as well, at least in the short term. Shady aspects are already demonstrating their poor bonding to 12/6 with easily triggered pockets and cracking anywhere that there’s been enough wind transport for slab formation.