Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Unlikely
- Size
- 1–2
Today at Todd Ridge I found the December 8th buried surface hoar (SH) on NW, NE and east aspects at the top of the ridge. The SH is laying down and degrading. Snow pit tests revealed no propagation in extended column tests. I did not observe any avalanche activity nor did I see any cracking or whumfing. The SH was found 25-60cm down in the snowpack in the Todd Ridge area.
Persistent slabs can be hard to trigger but can produce large avalanches. This can be a good time to dig in the snowpack and perform column tests in safe terrain.