Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 2
Recent and wind drifted snow have built slabs 2'-4' thick on top of a persistent weak layer of sugary, faceted snow that formed in February. You are most likely to trigger an avalanche involving this persistent weak layer on steep, wind loaded, north through easterly facing slopes right around treeline, or in shallower, rocky areas in the alpine. Avoid likely trigger points such as steep convexities or thinner snowpack areas around rock outcroppings.