| Trigger | Snowmachiner | Remote Trigger | 0 |
| Avalanche Type | 0 | Aspect | Southeast |
| Elevation | 2200ft | Slope Angle | unknown |
| Crown Depth | unknown | Width | unknown |
| Vertical Run | unknown |
Avalanche: Turnagain
Location: Eddies
Two laps on the WNW bowl of Eddies
Avalanche Details
See photos below - machine triggered slab avalanche occurred around noon directly across the valley from Eddies on sunnyside; looked to be ~100' across.
Obvious signs of instability
| Recent Avalanches? | Yes |
| Collapsing (Whumphing)? | No |
| Cracking (Shooting cracks)? | No |
Observer Comments
No collapsing observed, even by the party which set the new skin track to the top today.
Weather
Mostly sunny, occasional valley fog. Temps in the 20s, light variable wind.
Snow surface
Snow surface was soft along the entire route, even above treeline. 1mm surface hoar formation observed at the top of the route, never on a hard bed surface.
@1100' just out of the trees, 55cm of new snow from the Friday night/Saturday storm, with 100cm now covering the Thanksgiving raincrust. Ski penetration of 25-40cm on the lower mountain, decreasing to a low of 5-10cm above treeline in the wind affected areas at the top of the lower west bowl.
Snowpack
Right side up snowpack along the entire route. Hand tests showed no results at the interface of last week's snow and the Friday/Saturday storm snow below treeline.
Above treeline, some shallow 4-8" wind slabs were covered by several inches of soft snow; these broke cleanly in hand shear tests under moderate pressure, revealing a thick, softer 4 finger layer of facets.
Snowmachine triggered slab on sunnyside, referenced above.
slabfaraway