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Observation: Turnagain

Location: Tincan

Date:
Observer:
Route & General Observations

Tincan to 2500′

Evidence of recent wind slab avalanches both human triggered and natural. All likely occurring yesterday when winds were stronger and slabs were more tender

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

Several small D1 slabs on Tincan just above treeline in small terrain features, northern aspects, several tracks ski tracks near by - may have been human triggered.

Natural avalanche activity:
D1.5 on the northern shoulder opposite of CFR on Tincan
Debris on Todds run - northern aspect of Tincan
Debris in Elevator Shaft on North side of Sunburst
D1.5 on an Eastern aspect of Seattle Ridge

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

Mostly sunny
15F
Calms winds

Snow surface

000' - 8" of new snow
1500' - 8" of new snow with pockets of wind stiffened snow
2000- 2500' - Variable surfaces, Soured ridges, Northern terrain features were more loaded and Southern aspects were generally more scoured, above and at treelike.

Snowpack

2000-2500' elevation zone: Total height of snow varied from a few inches on scoured ridges to 3.5' on loaded leeward terrain features. Dug a hand pit on a North facing terrain feature near several small wind slabs. Found a (1F-4F) slab sitting on a layer of loose faceted snow, and it released upon isolation. In several places dug to the ground and found faceted snow on the ground. Probed near the crown of a wind slab that released yesterday and could feel a sudden density change near the ground, likely faceting. The total height of snow was 110cm (3.5') on this wind loaded feature. The slab thickness varied fro 8" to 17".

1600' - Dug a hand pit near several glide cracks (the three that released over a week ago) and found moist snow on the ground. Total height of snow 15"

Photos & Video
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