Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1–2
Cohesive slabs resting on top of weak faceted snow continue to be found throughout the snowpack. Moderate winds over the last several days have helped stiffen slabs especially near and above treeline and the upper ends of below treeline. Weak faceted snow that existed before the latest round of snow can be found near the ground or higher up near the interface of the new/old snow. Any avalanche triggered could be dangerous with lots of natural obstacles near the ground.
Pay attention to obvious clues like loud audible collapses and shooting cracks as this is an indication you've found a slab weak layer combination. You may be able to trigger these avalanches from long distances or from below. Avoid slopes or terrain steeper than 35 degrees being mindful of avalanche terrain that's above you.
ENE aspect above treeline with a buried near surface facet layer. This slope collapsed when we stepped onto it before digging the pit.