Avalanche: Turnagain

Location: Tincan Trees

Date:

January 12, 2018 3:00pm

Observer:

Matti Silta

Route & General Observations

Standard route up Tincan to weather station.

Avalanche Details

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Trigger	Skier	Remote Trigger	0
Avalanche Type	Soft Slab	Aspect	West Northwest
Elevation	2500ft	Slope Angle	37deg
Crown Depth	24in	Width	40ft
Vertical Run	100ft

Avalanche Details

D1.5 remote triggered by skier approaching convex rollover. Slope was on leeward side of small ridge. The crown was not investigated, but most likely storm snow with enough wind loading to create a firm enough slab to propagate.

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

Cracking occurs on most wind affected slopes and convex rolls. Whumphing was heard once at ~2500'.

Weather & Snow Characteristics

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

Weather

Snowing hard and warm. 32 degrees at Tincan pullout at 3:30pm.

Snow surface

New snow is wet and heavy, especially below 2000'

Snowpack

Hand pits showed poor bonding between new-old snow interface, especially below 2000' where rain crust is present.

Photos & Video

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Location

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