Natural avalanche evidence, Tuckerman Ravine
By Ryan Matz | MWAC Forecaster
Date of Observation: February 1, 2019 11:30 AM
Location of Observation: Tuckerman Ravine
Crown lines visible in Sluice, Lip, Center Bowl, Lower Snowfields below Duchess, hanging snowfield in Empress above lower snowfields. All suspected to have avalanched naturally some time between Wednesday night and early this morning. Active wind loading is filling in crowns, making crown height uncertain.
It looks possible that the Sluice, Lip, and Center Bowl avalanched as one large “bowlalanche”, including two step downs to deeper layers. The deepest bed surface, though now reloaded with wind deposited snow, seems to be the 1/25 rain crust. It also appears that the highest crown in the Lip was from a softer slab avalanching earlier in the storm/wind cycle, with other avalanches likely failing later and many in stuff piles below steeper terrain.