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Avalanche: Turnagain

Location: Tincan

Date:
Observer:
Route & General Observations

Standard up track to 2300′ and skied trees out.

Avalanche Details
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Trigger SkierAvalanche Type Soft Slab
Aspect NorthwestElevation 2000ft
Slope Angle 38degCrown Depth2ft
Width 50ftVertical Run 100ft
Avalanche Details

Numerous skier triggered/remote triggered D1 on various aspects below treeline.

Largest avalanche described above, and photos included. D1.5, 50' width, 100' length, bed surface 12/24/16 rimed surface hoar.

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

Collapsing any time off the skin track. Multiple collapses on the same slope.

Small shooting cracks on steep rollover.

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

Broken sky, occasional very light snow. Temps in the high 20s. Occasional light wind from the north.

Snow surface

2' to 2.5' of new snow along the route, since 12/24/16.
Ski penetration of 12" to 18".
Boot pen to neck in places.

Snowpack

2' to 2.5' of new snow on top of facets.
New snow and recently buried facets moist at 1000'. At 1500' the new snow was dry for the first foot. New snow under a foot was moist and the facets at the new snow interface below were also moist. Dry snowpack at 2000'.

Pit at 2200'
WSW Aspect. 25deg slope. Height of Snow 160cm.
CT1SC, CT3SC 74cm down on 12/24/16 buried surface hoar
Slab was fist hard to 4 finger +
ECTPV on the same layer
PST33/100END on the same layer
Note: Slope collapsed multiple times as we were digging the pit.

Photos & Video
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