Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Likely
- Size
- 4
Recent avalanches tell us all we need to know about this problem. They will be massive and deadly. They can break near the ground or in the middle of the snowpack on a pesistent weak layer of sugary facets. I don't expect any more to occur naturally unless strong winds occur but they are not in the forecast. Avalanches like this could be triggered by a person who probably wouldn't survive.