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. Here, slabs are well connected and you can still easily affect weak layers at the base of the snowpack. Above treeline, you can trigger avalanches from hidden weak areas of the slope, like close to rocks and rollovers. Be careful below the treeline on open and drifted slopes. No matter your elevation, you may not get signs of instability before you trigger a large, deadly avalanche. Steep rocky areas with drifted snow continue to be the most dangerous places. You can find safer travel on lower-angle slopes and slopes sheltered from the wind without a slab.