Persistent Slabs
- Alta montaña
- Límite del bosque
- Bajo el límite del bosque
- Probabilidad
- Possible - Likely
- Tamaño
- 1.5–3
At 60 to 100 cm deep, a weak layer of surface hoar is at prime depth for rider triggers to produce large avalanches. It can be most likely triggered on steep roll-overs in wind-sheltered terrain around treeline.