Persistent Slabs
- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Unlikely - Possible
- Taille
- 1.5–3
A hard melt-freeze crust is found around 50 to 100 cm deep. The concern is where weak layers of surface hoar and/or faceted grains exist above the crust. For areas where either of these weak layers exists above the crust, the possibility remains that riders could trigger large avalanches.