Persistent Slabs
- Alta montaña
- Límite del bosque
- Bajo el límite del bosque
- Probabilidad
- Unlikely
- Tamaño
- 2
A persistent weak layer (PWL) of faceted snow exists on northerly-facing slopes. In upper elevation wind drifted slopes, it is possible to trigger an avalanche 1-2 feet deep and over 100 feet wide. Dave Kelly toured in the Hells Canyon terrain with Snowbasin avalanche teams and found a snowpack with poor structure. They experienced minor cracking and collapsing and poor test results.
Check out Dave's full observation for more photos and information.