Persistent Slabs
- Hochgebirge
- Waldgrenze
- Unterhalb der Waldgrenze
- Wahrscheinlichkeit
- Possible
- Größe
- 3
Many slopes in the region are plagued by layers of weak faceted snow formed during the prolonged November dry spell. Avalanches failing on a persistent weak layer can be very sensitive, and they might be triggered remotely, from a distance, or worse from below!
Observers continue to report triggering booming audible collapses in many areas. These whumpfing sounds are a red flag indicating unstable snow, telling us that dangerous avalanche conditions exist. Here is a video observation from 12-27-2020,