By Mark Renson | AIARE
Date of Observation: December 22, 2019 1:30 PM
Location of Observation: Leve Rock, Tuckerman Ravine
Instructed at an AIARE 1 course. Took following temps at Hermit Lake at roughly 11:45am-> TAir: 0c, TSurf: -6c, T10: -8c, T20: -9.5c.
We did some digging near Leve Rock in Tuckerman Ravine. Huge variability – I found HS 190cm with HS 85cm roughly 4 meters away. Oddly, I could not find the 20191215 rain crust. Snowpack was boring with only 3 layers all hardness P and P+. Had a moderate failure 6cm down with no propagation. No graupel found. Pit closer to Leve Rock had a moderate ECT-P result on the rain crust and other different results and we speculate this might be due to micro wind currents per the large boulder nearby. Three skiers descended Right Gully and found wind affected snow in upper part and then nice skiing in Chicken Rock Gully. In summary: the Spatial Variability that the Presidential Alpine is notorious for was present in grand style. Descent on Sherburne was greatly improved from last Sunday’s Porcelain Shenanigans with the middle having some wind scouring but protected areas having nice skier packed with a few rocks below Crossover #7 that would be nice to avoid! See my Facebook spray for more pics.