Wind Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 2
Slabs of wind drifted snow have been continuously building over the last several days. Approach steep slopes that have a smooth, rounded, or pillowy appearance with caution, especially in areas of consequential terrain.
With south facing surfaces crusted over, there hasn't been a lot of snow available for transport, but the strong winds we've seen have been eroding these crusts, stripping snow from south and westerly aspects, and depositing it on to northerly facing slopes. Look for fresh deposits of wind drifted snow on the leeward sides of ridge crests and terrain features such as gully walls and sub-ridges. Stiff slabs may sound or feel hollow underneath, and cracking is a sign of instability.
Note the scoured, windward facing, westerly aspect on the shoulder of Mount Mellenthin. The leeward slope opposite to the left is wind loaded. You can also see plumes of blowing snow off the summit of Mount Tukuhniklivatz in the distance.