Persistent Slabs
- Alta quota
- Limite del bosco
- Sotto il limite del bosco
- Probabilità
- Very Likely
- Dimensione
- 3
Slab avalanches breaking on a persistent weak layer near the ground are likely today. This layer of weak, sugary facets can be found 6-12 inches above the ground just above a hard ice crust that caps old snow from October and early November.
On Friday in Paris Flats and Bloomington Canyon, my partners and I found this layer in every pit we dug (see the photo below) on slopes that faced the northern half of the compass. Avalanches breaking on this layer will be 2-4 feet deep or even more on heavily wind loaded slopes. Avalanches on this layer may also break hundreds of feet across.