Wind Slab
Today I was finding 12-14 cm of new storm snow. Blowing snow was obvious near treeline and above. We often cite the observation that wind blown snow can be 3-5 times as deep as the snow that has fallen from the sky. Simple pole probing is a great tool right now. At all but the highest elevations, our new snow overlays a rain crust. This crust is easy to find and is a useful tool to see how much snow has blown onto slopes, and how big a potential Wind Slab avalanche could be.
About wind slab avalanches
Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.