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Observation: Turnagain

Location: Cornbiscuit

Date:
Observer:
Route & General Observations

Standard uptrack. Special thanks to the crew ahead of us breaking trail!

Parking was limited throughout the Turnagain Pass corridor

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?No
Collapsing (Whumphing)?Yes
Cracking (Shooting cracks)?No
Observer Comments

My partner and I experienced whumfing on a northerly aspect, and other parties in the area reported whumfing on southwestern aspects.

Rapid wind transport in many areas

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

10-15°F
Bluebird
Northerly winds creating plumes at all elevations in the Twentymile and Portage valleys
Northwesterly winds at Alpine elevations in the Turnagain Pass corridor
Localized intermittent moderate southerly winds at ridges of both Magnum and Cornbiscuit

Snow surface

Mostly low density settling snow with minimal signs of wind effect
Occasional wind skin (above 1800') up to 2" thick on snow surface - only slightly more dense and easy to move through

Snowpack

Cornbiscuit at 2000'
(whumf felt in this area)
North Aspect
Ski/boot pen: 60cm/90cm
HS 115cm
ECTP16 ↓48cm at old/new snow interface
No signs of buried surface hoar

We were in assessment mindset today investigating wind effect and the 2' of snow accumulation from the last several days . We chose to stay out of steeper large runout paths.

Photos & Video
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