Pit and Observations at the bottom of Right Gully, Tuckerman Ravine
By Ian Peterson
Date of Observation: December 8, 2018 7:50 AM
Location of Observation: Bottom of Right Gully, under the rock band
Crowns observed across the right side of the Headwall, with fresh debris at the bottom of the bowl. Clear skies, no precipitation, air temp was in the negatives with wind chill. No precipitation. Strong NW wind actively transporting snow. Loading was observed at the bottom of the right gully choke in particular, we did not look up the gully to see what was happening up high. Pit dug at 4600 feet. CTM11 @15 cm, Q2 revealed an unexpected weak layer on the interface between the wind slab formed overnight and the day-old wind slab. CTM13 @30 cm showed instability between the day-old wind slab and the wind slab formed earlier in the week. We were unable to get results between the wind slab and the rain crust. Due to the instability of the new wind slab, we pulled the plug and skied the lower angle fan under Right Gully.