Persistent Slabs
- Hochgebirge
- Waldgrenze
- Unterhalb der Waldgrenze
- Wahrscheinlichkeit
- Possible
- Größe
- 2
A persistent weak layer (PWL) of faceted snow exists on northerly-facing slopes at the mid and upper-level elevations where it is possible to trigger an avalanche up to 1-3 feet deep and over 100 feet wide. Avalanche activity and field work this week has informed us that the slopes that are most prone to slide are recently wind-loaded and/or have a slab of stronger snow on top of the buried PWL (see video).
Video: Greg Gagne explaining the snowpack structure.