Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Unlikely
- Size
- 3
It's spring... the fight between winter and summer where in just a weeks worth of time, we've seen the full meal deal of weather conditions and that means the snowpack has been all over the map. From warm to warmer and then downright hot, the snow surface turned damp and unsupportable, with the bottom falling out in many locations. But just like a superhero, last Tuesday's storm swoops into the region packing a healthy dose of much colder air and saved us in the nick of time. Winter-like temperatures allowed the pack to knit together, tighten up, become stronger, and it's returned to its happy place. In essence, the persistent weak layer or PWL has gained strength and hardness and the snow above it is solidly refrozen. The good news is... this increased strength makes it pretty unlikely that you can trigger an avalanche that breaks around our now dormant problem child the PWL.