Observation: Turnagain

Location: Cornbiscuit

Route & General Observations

Ascended West face of Cornbiscuit to 2600′. Visibility was limited, thick clouds and valley fog moved in/out all day. Evaluated a North slope and found good stability in test plus pit. Skied N couloir and was surprised by glide crack 1/2 way down. We were able to ski around it without being directly below the glide. Could not see the glide crack from entrance of chute and it was a good reminder of how challenging it is to avoid glide cracks in steep terrain right now.


Recent glide avalanche on Raggedtop in the Gridwood Valley

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 glide avalanches - Small glide release on Seattle Ridge just North of 'uptrack', Glide avalanche on Raggedtop in Girdwood Valley likely released between 5pm and 6:30pm (photo below)

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

Mostly cloudy with thick valley fog rolling in/out all day, brief periods of sun through clouds
28F - 34F at 1000'
Winds were calm
No precip

Snow surface

*1cm of new snow at Cornbiscuit

1000' - 1cm of new snow on firm m/f crust (all aspects)
1700' - 1cm of new on 1-2" firm sun crust on SW aspects and 6" low density snow on shaded aspects
2600' - 8" settled snow on W and N aspects


Pit at 1700' - HS=260, pit height=110cm, N aspect, 31*slope. See pit profile for details. Wanted to get a closer looks at the melt/freeze layers from the End of Feb storm. Did not perform any stability tests.

At 2600' probed from ridge to pit site, HS varied from 70cm to 210cm. Dug a test plus pit found good stability in the top 1 meter of snow. HS=210cm, 42* slope. Structure was very uniform and right side up. Surface snow was Fist hard decomposing fragments and precip particles . Tests: ECTX. Skied N aspect from pit location. Sluffing was slow and easy to manage.

Photos & Video
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