Swirling winds have deposited wind slabs on many different aspects along upper elevation ridge lines. These slabs also vary significantly in hardness, thickness, and sensitivity to triggering. We dug a pit at the top of Little Superior Bowl (NE aspect, 10300') and observed ECT P 12 30cm (12") below the snow surface on an interface between a wind slab and softer storm snow. In the same test we also observed ECT N 2 10cm (4") below the snow surface on an interface between last night's snow and yesterday's snow surface (more on that under the next problem).

The 10cm (4") of new snow overnight formed a relatively cohesive layer on top of a softer layer of snow. One skier in our party triggered a very small avalanche (4" deep, 30' wide, ran 50') in Two Trees, on a south-facing slope at 10000' that appeared to be on this interface.