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Observation: Turnagain

Location: Corn Biscuit

Date:
Observer:
Route & General Observations

Standard West Ridge route

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

Recent cornice fall along Magnum's South face and a recent glide avalanche in Lynx Creek drainage

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

Clear
Inversion -2F at road increasing to around 20F at ridge top
calm winds
No new precip

Snow surface

thin candy shell crust to around 1000'
surface hoar varied in size, 1cm valley bottom becoming 2-3mm to ridge tops.
*between 2700'-3000' surface hoar was tiny ~1mm

Snowpack

Pit#1 - 2000', HS=135cm, N aspect, 24* slope - snow was right side up and very stable in this location. We found a MF crust on the ground that was moist and bonded to the ground with P-hard rounding grains above. Tests:CTN

Pit#2 - 2300', HS=82cm, S aspect, 25* slope - we probed throughout this location and could feel crust/facet/crust sandwich in the bottom 20-40cm of the snowpack. We intentionally dug in a shallow area to test this structure with a thinner slab on top. The height of snow varied from 270cm to 60cm, and averaged around 175cm. Tests: CT24, ECTX, ECTP19 and failed 50cm below surface just below a 1cm MF crust on 1mm rounding facets. See pit photo for more info.

At 1600' HS ~ 100cm
At 2700' HS ~ 160cm

Photos & Video
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