Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Unlikely
- Size
- 1.5–2.5
Old weak, faceted snow formed in the late fall is now buried by two to five feet of dense snow. The last avalanche to be reported on this layer was three weeks ago. That avalanche was a very close call for the triggering rider. While the overlying snow has settled more since that avalanche occurred, the weak layer beneath has not changed much, if at all. Persistent grains remain a problem. After being stressed by peak loading during storms and wind loading, they continue to hang around deep in the snowpack, potentially growing even weaker.