Avalanche: Turnagain

Location: Silvertip

Date:

January 26, 2019 8:12pm

Observer:

Dan Starr

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	Natural	Remote Trigger	0
Avalanche Type	Soft Slab	Aspect	North
Elevation	3000ft	Slope Angle	unknown
Crown Depth	unknown	Width	unknown
Vertical Run	unknown

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

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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

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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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IMG_4224

1/21 BSH

Location

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