| Recent Avalanches? | No |
| Collapsing (Whumphing)? | Yes |
| Cracking (Shooting cracks)? | Yes |
Observation: Turnagain
Location: Tincan
We skinned just above treeline, but stopped at the bottom of Common as visibility disappeared. There was over a foot of new snow since Sunday morning, and we saw plenty of signs indicating poor stability.
Obvious signs of instability
Observer Comments
We got several collapses in an area that had a really soft wind slab that was buried by about a foot of fresh snow. The weak layer was a layer of near-surface facets that formed during the dry period from 12/2-12/5.
Weather
Snowing at the Tincan parking lot at 11:00, but the rain level climbed to about 1200 feet by the time we left (around 3:00). Light easterly winds with gusts strong enough to start blowing snow, especially above treeline.
Snow surface
12-18" new snow made for some good riding, as long as you could keep your speed up! Surface conditions deteriorated as we went dropped in elevation, with heavy and sticky snow just above the parking lot.
Snowpack
We saw multiple collapses, shooting cracks, and unstable pit results all failing at the old/new interface. Also noted the snow was really eager to slide on the old rain crust.
Tincan. Snowpit at 2000', with 15" of new snow sitting on facets, sitting on a crust. 12.07.2020
Eric stomping in a skin track into the abyss. 12.07.2020