Wind Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 1–2
Today, be prepared for two distinct types of wind slabs. On primarily westerly slopes, expect to encounter drifted slabs formed from the 13 inches of snow received yesterday. These slabs might be large and appear aged, with a melt-freeze crust on the surface. Beneath this crust, there's likely to be soft, dry snow that may be poorly bonded to the slick, icy layer left by the previous storm. Although these slabs may not easily trigger, they aren't likely to show clear warning signs before failing at the interface between the new and old snow or within a buried weak layer. Identifying them can be challenging. Dig and investigate this interface before committing.
Additionally, look for new wind slabs on easterly aspects up to one foot thick formed from the snowfall last evening and continuing today. These will be easily identifiable as clean, white areas of new snow. The most reactive of these fresh wind slabs will be found in areas protected from the wind. Watch for typical warning signs like shooting cracks and snow transported by the wind at ridgelines. Performing frequent hand shear tests will aid in assessing the stability of these new slabs.