| Recent Avalanches? | No |
| Collapsing (Whumphing)? | Yes |
| Cracking (Shooting cracks)? | No |
Observation: Turnagain
Location: Cornbiscuit
Standard uptrack. Special thanks to the crew ahead of us breaking trail!
Parking was limited throughout the Turnagain Pass corridor
Obvious signs of instability
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
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.
Steady strong northwesterly winds ripping through all elevations in the Twentymile region
Strong northwesterly winds transporting snow in the Portage valley
Plumes from northwesterly winds loading lee aspects throughout Seattle Ridge
North aspect testpit at 2000' of Cornbiscuit
Looking north toward Seattle Ridge - winds decreased by late afternoon (but still creating plumes near Johnson pass)
facets at failure interface