Persistent Slabs
- Alta montaña
- Límite del bosque
- Bajo el límite del bosque
- Probabilidad
- Likely
- Tamaño
- 3
The buried persistent weak layer problem involving sugary faceted snow is a very dangerous and notoriously tricky avalanche problem, and it is responsible for most fatalities, injuries, and close calls in the Logan Zone.
I found these nice large faceted grains or depth hoar in a very weak buried persistent weak layer in Three Terraces in Upper Providence Canyon Thursday.
- Avalanches failing on a buried persistent weak layer can be very sensitive, and they might be triggered remotely, from a distance, or worse from below!
- Cracking and collapsing of the snow are a red flag, indicating unstable snow conditions.