Persistent Slabs
N
NE
E
SE
S
SW
W
NW
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1–2
You can trigger a dangerous avalanche on north, northeast, and east-facing slopes near and above the treeline. The most dangerous areas are the lee sides of a ridgeline or inside of a gully or a couloir where wind-packed, stiff slabs of snow rest on top of old, weak snow from November. You can reduce your chances of triggering an avalanche by avoiding these dangerous terrain features.