Deep Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 2–3
If a failure occurs on persistent weak layers at the base of the snowpack, avalanches 3 to 5 feet deep could be triggered and result in serious injury or death. These slides are more likely to be triggered by a larger load, like a group of riders all on a slope at one time or when an individual finds a thin spot in the slab. Thin spots are difficult to detect but are often next to rocks or cliffs.