Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1–2
The weight of a single person could trigger a dense slab avalanches up to two feet in depth on a weak layer of buried surface hoar. The sensitivity of these slabs to human triggers may increase as the day warms. Some potential may remain for skiers and riders to trigger deeper persistent slab avalanches with depths to three feet on a layer of faceted snow that is lower in the snowpack.