Persistent weak layers
- Above treeline
- Größe
- 2
Stability: very poor · Frequency: some
Stability: very poor · Frequency: some
Weak layers in the old snowpack can be released in isolated cases even by individual winter sport participants in all aspects. Avalanches can penetrate even deep layers and reach a dangerous size. Distinct weak layers in the old snowpack necessitate defensive route selection. Isolated whumpfing sounds can indicate the danger.
The old snowpack will be prone to triggering in some places. This applies in particular on steep shady slopes above approximately 1900 m. Towards its surface, the snowpack is unfavourably layered and its surface consists of loosely bonded snow lying on a melt-freeze crust that is barely capable of bearing a load. Towards its base, the snowpack is faceted and weak. Remotely triggered avalanches are possible in isolated cases.
Bulletin data: ARPAV Centro Valanghe di Arabba (via EAWS / avalanche.report)