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Avalanche: Turnagain

Location: Tincan Trees

Date:
Observer:
Route & General Observations

Standard up-track to Beaded Stream wx station/treeline.

Avalanche Details
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Trigger NaturalAvalanche Type Soft Slab
Aspect South SouthwestElevation 2200ft
Slope AngleunknownCrown Depth 24in
Width 30ftVertical Rununknown
Avalanche Details

Two natural avalanches were observed in the Snake Pit on Tincan in adjacent gullies. Evidence of propagation down the gully walls.

Red Flags
Red flags are simple visual clues that are a sign of potential avalanche danger. Please record any sign of red flags below.
Obvious signs of instability
Recent Avalanches?Yes
Collapsing (Whumphing)?Yes
Cracking (Shooting cracks)?Yes
Observer Comments

Whumpfing/collapsing observed near treeline. Most significant one was felt after stepping out of one ski and penetrating into facets with boot.
Cracking in wind loaded areas

Weather & Snow Characteristics
Please provide details to help us determine the weather and snowpack during the time this observation took place.
Weather

Snowing, heavy at times 2+ inches fell during 4 hrs in the field.
Winds were easterly 20 mph and gusting into the 40s. Definitely moving snow around.
Temperatures: 32F at parking lot, 20s at Treeline

Snow surface

Soft new snow 16-20"
Stiffer where wind effected, scoured in spots
Heavier below 1500'

Snowpack

16-20" of new on surface hoar and/or facets. Hand pits were failing on isolation in wind effected spots and compression tests failed at 4-6 taps. Bottomless conditions below treeline sinking into faceted snow.

Photos & Video
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