Persistent Slabs
N
NE
E
SE
S
SW
W
NW
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 2–3
You can trigger an avalanche where recent winds have drifted snow over buried weak layers. The most dangerous slopes face easterly where you find stiff, wind-drfted snow under ridgetops, in gullies, and on steep rollovers. Smaller avalanches may step down into deeper buried weak layers creating a much more dangerous slide. You can trigger an avalanche from below and a distance; multiple people could ride a slope before you trigger an avalanche. The recent snow fell on a variety of weak surfaces such as near-surface facets and surface hoar. Stiff slabs over surface hoar can break into low-angle terrain so consider this while choosing safe zones. You can find safer travel in wind-sheltered terrain with no slab and lower-angle slopes.