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Avalanche: Turnagain

Location: Tincan

Date:
Observer:
Route & General Observations

Standard uptrack to Tincan common. Surface snow is moist all the way to the ridgetop. Made for some tricky (back seat) skiing.

Avalanche Details
If this is an avalanche observation, click yes below and fill in the form as best as you can. If people were involved, please provide details.
Trigger SkierAvalanche Type Wet Loose Snow
Aspect EastElevation 3100ft
Slope Angle 38degCrown Depth 12in
Width 25ftVertical Run 250ft
Avalanche Details

I initiated a wet loose avalanche with a hard turn mid-slope on a slight convexity. Slope was just steep enough that the loose, wet snow continued to build in mass and momentum. When debris finally came to a rest it had entrained enough snow to easily bury a person.

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)?No
Cracking (Shooting cracks)?No
Observer Comments

New glide avalanches in Skookum drainage, Penguin ridge and Seattle ridge.
Shallow storm slabs on N,E and W Pyramid.
Lots of shallow wet, loose avalanches and roller ball activity on southerly tilted slopes.
Cornices chunks shedding.
Temps warming significantly throughout the day as the sun poked out.

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

Light rain and mostly cloudy in the morning turning to mostly clear skies by 2pm. Temps were warm, getting warmer. 40 degrees at noon (1,000') and 47 degrees by 4:30. Winds were very light in the afternoon hours from the NE.

Snow surface

1,000 - 2,000': 6-12" new snow. Moist to very moist.
2,000 - 3200': 12-16" new snow Moist.

Snowpack

Snowpit at 2700' on a NW aspect. 22 degree slope. HS= 365cm
Top 40cm (16") was moist new snow (hot powder) was sitting on a thin mostly compressed layer of dry snow from early Saturday. Not the obvious upside down structure that Wendy found yesterday. Seems the low density snow has compressed a fair bit in the last 24hrs under the weight of the overlying slab.
ECTN x 2

Photos & Video
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