Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Unlikely
- Size
- 2
Dangerous avalanches failing on a persistent weak layer are increasingly unlikely as the shallow, sugary snow from November is buried and pressed into terrain anchors by a deep layer of heavy and hardening snow.
- Avalanches failing on a persistent weak layer could still be triggered remotely, from a distance, or below.
- Cracking and collapsing (or whumpfs) are definite signs of instability.