Persistent Slabs
- Alpin
- Limite forestière
- Sous la limite forestière
- Probabilité
- Unlikely - Possible
- Taille
- 1.5–2.5
A preserved layer of surface hoar is found down 35 to 65 cm. At higher elevations, where the weak layer is not being capped by a rain crust, it may be reactive to human triggers. Continuously assess this tricky weak layer as you gain elevation.