Persistent Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Likely
- Size
- 2
Incremental loading has added stress to our weak, faceted snowpack increasing the odds for human triggered avalanches. Above treeline, areas of wind drifted snow have created additional stress to persistent weak layers, and human triggered avalanches are likely on steep slopes facing NW through E. Near treeline and below, the underlying snowpack is very weak on all slopes facing W through E, but we may not yet have a developed slab on top. Human triggered avalanches are possible in these areas, particularly on slopes where wind thickened slabs exist. Choose terrain wisely. Dig down in the snow and see if you can detect a denser slab on top of weaker snow. Cracking and collapsing are signs of instability. It's time to put the persistent weak layer problem back on our radar.