Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Unlikely
- Size
- 3
The buried persistent weak layer (PWL) has become a damp layer of rounding facets. It's more like a layer of soft snow underneath very firm and refrozen snow. Triggering an avalanche on this layer isn't impossible but will be unlikely especially with such refrozen snow on top.
In the future, this layer could make wet avalanches when the snow begins melting again and liquid water percolates down through the snowpack, but I don't think it will be a concern today. Local guide and avalanche pro, Tyson Bradley, found this layer in Days Fork yesterday and had similar thoughts - we won't be triggering avalanches on this layer now, but it may come to life again before spring is over.
Video from Nikki's field day in Upper Big Cottonwood Canyon on Wednesday. What she found mirrored what I saw in the Uintas on Thursday in this video.