Observations

Center Headwall Avalanche

January 19, 2021 at 11:00 AM
Name: Jeff Fongemie| MWAC
Location: Tuckerman Ravine

In Tuckerman Ravine today under clear skies, no sign of snow transport observed. Light wind. Overall snowpack has increased in size significantly. High degree of spatial variability is obvious. Pillows of new snow, with patches of scoured surface nearby. Traveling on skis through the small trees on the north side we crossed through sections of pencil hard snow capping softer snow underneath, sections of soft 4F snow and some hard wind packed areas. Stability tests varied from easy to no results.

Center Headwall Avalanche: Obvious evidence showing that a section of the headwall avalanched. The crown is still sharp in places and looks to be re-filled somewhat. Crown approximately 250 feet wide, and perhaps as much as 16 – 24″ in height. Debris from the avalanche is obvious, only partially covered with new snow and can be seen crossing the floor of the ravine ending near a large rock feature (Levy Rock), close to where the hiking trail opens up to the floor of the ravine. For timing, I’ll estimate that this occurred late in the afternoon yesterday based on the amount of new snow blown into it. SS-U-R3-D2