December 11
Spruces to Reynolds continuing to Wilson Peak and out Millcreek
Elevations, slope angles and aspects
6200-10k, angles approaching 40°, all aspects
Snow conditions
There was 3-8", settled, from the recent storm, over a variable, mostly crusted base. Scattered wind drifting was observed at elevations above about 9000', mainly on slopes with an east facing component.. Scouring to the old rain crust was found, on opposing aspects. Daytime heating was melting sun exposed. On the shady side, the recent storm snow was starting to recrystalize. Surface hoar was observed at lower elevations, by the creek and in valley bottoms.
Had one collapse, which occurred, testing the sensitivity of wind drifting along the east facing Wilson chute ridge. No other signs of instability.
Weather
Bluebird in the morning, with some high clouds in the afternoon. Winds were light to non-existent. Mild temperatures, cooler at lower elevations and in the shade.
Snow pit
Layers
snow profile
Evaluation
Settlement, time and recrystalized near surface snow have decreased the potential for instabilities. The felt collapse, combined with observed wind drifting, suggest some possibility for avalanche activity remains. Snow pit testing produced an easy shear, just above the old rain crust, adding one more level of complexity to the ongoing crust-facet-crust-facet puzzle.
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