Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Unlikely
- Size
- 1–2
Layers of buried faceted snow persist in the snowpack. Although unlikely, the chance persists for humans to trigger large hard slab avalanches with depths that could reach over three feet upon the deepest of these layers. Areas where these weaknesses may be found are steep avalanche paths that have not seen much traffic throughout the season, particularly those with northerly aspects. Larger triggers such as snowmobiles or groups of skiers may be necessary to initiate failure of these slabs.