Deep Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 2–3
The storms of the past week added significant weight on top of deeper instabilities in the snowpack. If you see very deep avalanches with wide crowns, that's a warning to stick to simple terrain. Older facet/crust layers are buried 4-5 feet in the snowpack. While we have a lot of uncertainty about this problem, continue to factor in the high consequences of an avalanche when selecting terrain until we learn more.
(2/26/2026)
A number of large, natural avalanches on a leeward mid-slope feature. Note blowing snow. This likely ran on a weak layer above the 2/7 crust, ~2 feet below the surface. Cutthroat Lake. E-SE, 6,600ft