Investigation of Skier Accidental LLSA backcountry Tylenols/ Purple Bowl connector slope

Map for Mountain Information Network report: Investigation of Skier Accidental LLSA backcountry Tylenols/ Purple Bowl connector slope

Information

Avalanche date/time
Wednesday, February 24, 2021 at 23:00
Estimated occurrence time of avalanche
From 24 to 48 hours ago
Number of avalanches in this report
1
The size of avalanche
2

Comments

HS at crown was 80cm fattening quickly into a crossloaded feature 5m away. It appears two skiers were on the slope at the same time and the slab was triggered directly by the first skier. Both ski tracks retreated skier's left after about 3-5 turns as failure was noticed. First skier's tracks were wiped out. The crown was about 40 cm deep at initiation but within 5m grew to a depth of 80cm or more as the crossloaded feature beside the ski line failed. Areas of the track were gouged to just above the ground and large chunks of slab bulldozed into the deposit. It appears the avalanche nearly stopped at a bench about 50m below the crown however it plowed into the slope below and ran a further 60-80m creating a significant deposit at least 2m deep (despite the fact that the avalanche was only 5m wide at the crown and 10m wide at the deposit). Time is estimated above.