Wind Slabs
- Alpine
- Treeline
- Below treeline
- Likelihood
- Possible
- Size
- 2
Brett Pelletier photo of significant wind loading along the Park City ridgeline, blowing from the southwest, loading the northeast aspect....observation HERE
I suspect conditions will be slightly less sensitive today, but you will still be able to trigger shallow soft slabs 8-18" thick and up to 150' wide in recently wind loaded terrain. Again, these will be most prevalent on north through east facing slopes in the upper elevations, but isolated pockets exist around the compass and in lee terrain in the mid-elevations. Some of these soft slabs may be triggered at a distance...as the new slabs sit uneasily on very weak faceted snow and in some cases, surface hoar. Cracking and collapsing are clear indicators of localized instability. These wind drifted snow and new snow avalanches (below) will soon transition to the PWL (persistent weak layer) category in the coming days.