Persistent Slabs
- Hochgebirge
- Waldgrenze
- Unterhalb der Waldgrenze
- Wahrscheinlichkeit
- Possible
- Größe
- 2
Very weak sugary or faceted snow near the ground is widespread across the region, and people could trigger avalanches where a slab of more cohesive snow has formed on top of the weak snow.
- Avalanches failing on a buried persistent weak layer 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.
The sugary, faceted crystals just fall out of the pit wall in some places. People could trigger dangerous avalanches where a cohesive slab has formed on top of a widespread buried persistent weak layer. These large faceted grains are more like the size and texture of rock salt than sugar. This is classic depth hoar, and it's likely to haunt us later in the season when slopes are overloaded by inevitable storms.