Persistent Slabs
- Hochgebirge
- Waldgrenze
- Unterhalb der Waldgrenze
- Wahrscheinlichkeit
- Likely
- Größe
- 3
Incremental loading continues to stress the persistent weak layer in our snowpack keeping us in a perpetually dangerous state. Collapsing continues to be widespread on a variety of aspects and elevations. The suspect weak layer is buried about 2 feet below the snow surface, and is easily observed in snow pits. Human triggered avalanches up to 2 feet deep remain likely. Above treeline, leeward slopes hold deep hard slabs of previously wind-drifted snow and dangerous avalanches can break 2-6 feet deep.
The persistent weak layer problem is not limited to the shady slopes. Southerly aspects have poor snowpack structure and yesterday, Dave and I got very reactive test results on a SE aspect at 11,000' (see video below). The strategy continues to be avoidance of slopes steeper than 30 degrees on all aspects.