Persistent Slabs
- Alta montaña
- Límite del bosque
- Bajo el límite del bosque
- Probabilidad
- Likely
- Tamaño
- 3
Recent avalanches are the greatest indication of avalanche danger. More than 20 human-triggered avalanches in the Salt Lake area mountains - failing in the buried persistent weak layer (PWL) - have been reported to the UAC since January 1, now with one fatality. Many avalanches have been triggered remotely, over 3' deep and over 150' wide. (Thursday's Martha's Bowl slide was reported at 300' wide.) Recent storm snow and moderate to strong winds have built a dense slab on top of this PWL creating dangerous avalanche conditions. You simply need to avoid steep terrain facing west, through north, and east at the mid and upper elevations.
If you choose to enter the terrain where this PWL exists, stick to low-angled slopes (less than 30° in steepness) with nothing steep adjacent to or above you.