Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 2
Yesterday's snowmobile triggered avalanche clearly demonstrates that the snowpack remains unstable. What is notable is that this avalanche was triggered over a week after the last storm. I was able to get a test slope to fracture during fieldwork on Thursday. Snowpit stability test results remain poor with most tests failing during isolation of the column. These are all red flags. The buried Persistent Weak Layer is still dangerous and will remain dangerous through the next storm.
Warmer temperatures this week have helped stabilize the snow especially in lower elevations. Once everything freezes, it is unlikely we'll see any avalanche activity below 9500'. High elevation more northerly facing terrain is where the danger is and will remain for a while.