Microwave - Size 2 Cornice

Obs from an AST 2 course today. Recent ( 24 Hr) Cornice failure pulled slab in lee,steep, rocky terrain. Minimal propagation for the feature. Several other recent 72-96 Hr cornice triggered slabs also, up to Size 2.5 on NE aspects. Suspect windslab/Feb Crust/Facet interface combo