Fairly widespread cycle during the latter part of the storm on December 18th, with crowns observed from 4,000ft to 6,600ft on N-E-SE aspects. Sizes ranged from D1.5-2, with perhaps a couple D2.5's. Impressively wide propagation with many of the avalanches. See associated observation: https://nwac.us/public-obs/20211219_lanham-lake-zone/
I found large, preserved stellars to be the failure layer for a couple of these slides.