Avalanche: Turnagain

Location: Silvertip

Date:
Observer:
Route & General Observations

AAI Pro 2 course toured up to 2400 on the east ridge of the Silvertip drainage (common route up to Silvertip trees).

Contact, Location & General Observations
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Forecaster Comments

A big thank you to the AAI/AAS Pro 2 course for all their valuable information!

Avalanche Details
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Trigger NaturalAvalanche Type Soft Slab
Aspect NorthElevation 3000ft
Slope AngleunknownCrown Depthunknown
WidthunknownVertical Rununknown
Avalanche Details

Natural soft slab observed in the back of silvertip creek. Size unknown, observed from a distance in poor light. Likely R3-D2/3.

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)?Yes
Observer Comments

Shooting cracks, recent avalanches, and propagating pit results were observed.

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

Temps- low to mid 20's
Skies- clear in the morning, broken by afternoon
Winds- calm

Snow surface

Rain crust up to 1800'
15-30 cm. new snow 1800-2400

Snowpack

At 2100 feet the 1/21 (MLK) buried surface hoar was found under 30 cm's of new snow. This layer was very reactive in pits. Results on this layer were:
ECTP6
ECTP3
PST40/100 END
PST20/100 END

Down 80 cm's another layer of BSH was found, likely the 12/25 layer. This layer also produced propagating results in tests:
ECTP30
PST70/100 END

Higher at 2400 both layers were observed however did NOT propagate in tests.

Photos & Video
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