Persistent Slabs
N
NE
E
SE
S
SW
W
NW
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1.5–2.5
The most dangerous slopes are near treeline, where slabs are well connected but you can still easily affect weak layers at the base of the snowpack. You can trigger large avalanches above treeline from hidden weak areas of the slope close to rocks and rollovers. You may not get signs of instability before you trigger a slide. Be careful below the treeline on more open and wind-affected slopes. Steep rocky areas with wind-drifted snow continue to be the most dangerous areas. You can find safer travel on lower-angle slopes and those sheltered from the wind without a slab.