Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Unlikely
- Size
- 3
All indications are that the persistent weak layer of facets near the ground is dormant and perhaps done. This layer has gained noticeable strength, and it has a very thick hard slab on top of it making it hard to impact. Most extended column tests (but not all) are no longer breaking at all. The last avalanche on this layer was triggered with explosives at a ski area last Saturday a week ago. There have been no avalanches on this layer seen or triggered in the backcountry although I suspect some happened naturally during storms in December.