Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Unlikely
- Size
- 2
A persistent weak layer (PWL) of early season facets makes up the base of the snowpack on west-north-easterly facing slopes at the mid and upper elevations.In these areas, it is still possible to trigger an avalanche up to about 18 inches deep and over 100 feet wide. Cracking and collapsing are become less common and snow tests hint at slow stabilization, yet persistent weak layers come by their name honestly. It is true that in some areas, the snowpack has warmed and become isothermal and this may end up being a good thing...but facets are facets and it's just part of their character: they are just hard to trust. Exercise caution if you're traveling through steep terrain with this poor structure.