Persistent Slabs
- Alta montaña
- Límite del bosque
- Bajo el límite del bosque
- Probabilidad
- Likely
- Tamaño
- 2
Local snow-pro Ted Scroggin was in the Gold Hill zone yesterday and reported no shortage or collapses and shooting cracks. Ted's insight definitely squares up given the snow structure he illustrated in the image above.
Several storms worth of snow along with wind drifts scattered in the alpine, now rest on top a persistent weak layer of near surface facets that grew large and grainy during the long stretch of dry January weather. The wheels of the bus aren't coming off just yet, but they are wobbling and all we need now is to stack a slab on top of this structurally challenged layer.
So here's where it gets tricky... as recent storm snow begins to settle and gain some body, it'll also gain some strength and morph into a more cohesive piece of snow or what we call a slab. This of course, is a natural process, but as the snow goes through changes it'll also get touchy and react to our additional weight. Once triggered, today's avalanches may break a bit deeper and wider than we might expect, packing a punch as they gouge into weak layers of snow, now buried just over a foot beneath the snow surface.
The snowpack came to life Thursday and definitely started talking. On my field day with John on the south half of the range, we experienced multiple collapses along with no shortage of shooting cracks in front of our skis like in the image above. Weston and Shaun were near Mirror Lake and report similar findings found HERE.