Persistent Slabs
- Hochgebirge
- Waldgrenze
- Unterhalb der Waldgrenze
- Wahrscheinlichkeit
- Unlikely
- Größe
- 3
The various faceted layers in our snowpack are mostly dormant and are adjusting to the load of snow and wind from early last week. However, as evidenced by the skier-triggered wind slab avalanche in American Fork Canyon on Sunday, avalanches remain possible. The areas of biggest concern are wind-loaded slopes at the mid and upper elevations that face northwest through southeast where the wind slabs are sitting on top of weak, faceted snow. Notice the rounded pillow of snow in the photo below (Hardesty/Wilson/Pine) - illustrating a wind-drifted slope.
Safety in avalanche terrain (admittedly a very generous relative term) always goes back to the basics, and one simple rule is avoid the structure of strong snow over weak snow. This past weekend my partners and I were able to enjoy riding some steep lines on northerly aspects at the mid and upper elevations. But we constantly evaluated each slope, looking for the presence of a stronger slab (such as a hard wind drift) on top of weaker faceted snow. On one instance where we found this structure, we simply moved on to different slope where this structure was absent.