Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1–2
You could trigger a large and dangerous avalanche at upper elevations in steep connected terrain if you find shallow areas where a stiff slab sits above weaker snow below. Common trigger points include rock outcroppings, steep rollovers, below ridges, and cliff bands. Tuesday night and Wednesday strong westerly wind stripped wind-ward slopes and stiffened the snow surface on lee slopes. Avalanches on previously drifted slopes could step down to deeper weak layers, triggering a larger and more dangerous slide. Use caution on steeper slopes where the snow surface transitions from soft to stiff or in places with a rounded or wave-like appearance.
You can find safer riding options below treeline or on low-angled, wind-sheltered slopes without steep overhead hazards.