Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Unlikely
- Size
- 2
A persistent weak layer of faceted snow still exists on northerly aspects, with the weakest snow found right around treeline. Stability tests this week have shown that this weak layer has gained strength and is largely non-reactive however, it could still pose a threat in areas of extreme terrain right around treeline. The following photos illustrate our findings from last week:
This pit was dug in the alpine on an open, planar slope. The faceted weak layer was compressed, showed signs of rounding, and had a stiff, strong slab on top. Stability tests produced no results.
This pit was dug on a NE aspect right around treeline. You can see that the over riding slab is also very dense and strong, but the faceted weak layer is thicker, and remains loose and dry. Stability tests also produced no results.