Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 2
There is a persistent weak layer of faceted snow and depth hoar down near the ground. This problem exists above about 9,000 feet on slopes facing northwest through northeast, including upper-elevation slopes facing west through southeast. Collapsing and cracking on these slopes continues to be reported in the Salt Lake mountains, and also full propagation with extended column tests. Although triggering an avalanche is becoming less likely, human-triggered avalanches 1-2 feet deep remain possible, especially on slopes that have been wind-loaded at some point over the past week.
The image below shows the structure of stronger/denser snow on top of the persistent weak layer of facets and depth hoar down near the ground.