Tuckerman and Ammonoosuc Ravines

January 19, 2022 at 1:00 PM
Name: Ryan Lewthwaite| MWAC
Location: Tuckerman and Ammonoosuc Ravines

In Tuckerman Ravine this afternoon the winds were moderate from the west gusting to strong. Light snow showers, blowing snow, with temperatures around 19F degrees. Observations from the ravine floor revealed no new avalanche activity. One finger hard slabs of wind drifted snow were unsupportable in most locations, making for easy boot-top deep penetration. The west winds were strong on the steep slopes above and you could see evidence of wind sculpting and scouring snow from exposed locations. Aspects facing east and northeast were collecting wind transported snow and forming smooth slabs in isolated locations. Digging into the snowpack revealed newly formed slabs of wind drifted snow over crust and facet combinations. Much of the snowpack is still very segmented by trees, rocks and erosive wind.

Nathan Delmar explored the Ammonoosuc Ravine side of Mount Washington with similar wind and weather conditions. The western exposure here has been heavily effected by wind, leaving most of the snow in below treeline and very isolated locations above treeline. He mentioned the best place to find wind deposited snow is on steep slopes of the ravine lower in the drainages. The Cog had thin but skiable coverage with 1 to 3 inches of new snow. Nathan found a similar snowpack structure as the eastside with notably less coverage overall. Wind drifted slabs were pencil to 1 finger hardness and less than 2 feet thick.