Dec. 31, 2015, 10 a.m. PST
Elevation: Near treeline
Did you see any avalanches? No
Did you trigger any avalanches? No
Was anyone caught in an Avalanche? No
Comments: On the west / leeward side of Tinkham, snow below the rideline was wind loaded for 50 - 100 feet below the crest (at 4.8K), and readily cracked, with limited propagation. This included the upper reaches of the Twin Lakes Couloir / Zipper Chute, which we declined to ski. Descending in the trees on the same aspact further south, the top 6 inches of snow were highly faceted and rotten feeling, but on a stable / solid base.