Deep Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 2–3
Dangerous deep slab avalanches three to five feet in depth could still fail on a layer of weak faceted snow that formed in December. Failure continues to be a possibility in areas where that persistent weak layer is not as deeply buried and may require larger triggers like a snowmobile or a cornice failure. The consequences of triggering one of these deep hard slab avalanches would be severe.