Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 2–3
Above 7500, the potential for humans to trigger slab avalanches with depths to four feet poses a serious threat to backcountry users. If triggered these dangerous slabs will fail on a layer of faceted snow near the ground that persists on all aspects. These slabs could be triggered by the weight of a single person. Yesterday an avalanche was reported to have been triggered by a moose in the south fork of Spread Creek area.