Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1–2
Weak snow formed in January and early February is buried 2 to 3 feet deep. We have seen human-triggered avalanches failing at this layer within the last few days. This problem is more pronounced on slopes that face the north half of the compass, where weak, faceted snow was very well developed, and pockets of surface hoar remain buried. Hazard is also elevated in steep rocky terrain where impacting these weak layers is more likely, and on previously wind-loaded slopes. You may or may not see warning signs like large collapses or other recent avalanches. Careful assessment of the snowpack is required before committing to steep terrain.
(2/27/2026)
Recent avalanche near Split Rock. This avalanche was on the smaller side, but if piled up in a creek of depression (terrain trap), it could have still buried a rider.