Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Likely
- Size
- 2
A persistent weak layer of faceted snow under the new snow from this week's snowfall (example photo below, the facets are the sugary looking snow under the new snow) can fracture and produce soft slab avalanches today. This layer exists mostly on northerly facing slopes but can be found on east facing slopes as well.
How long will this layer remain unstable? The only clear answer I have is that it takes time to heal, and I wouldn't trust it today. The simple presence of this layer is all I need to know in order to avoid avalanche terrain today.