Persistent weak layers
- Above treeline
- Size
- 2
Stability: very poor · Frequency: many
Weakly bonded old snow represents the main danger.
Stability: very poor · Frequency: many
Weakly bonded old snow represents the main danger.
Weak layers in the upper part of the snowpack can be released over a wide area easily by individual winter sport participants. The avalanche prone locations are to be found in all aspects above the tree line. Such avalanche prone locations are numerous but are difficult to recognise. Mostly avalanches are medium-sized. Caution and restraint are required. Whumpfing sounds and the formation of shooting cracks when stepping on the snowpack and fresh avalanches serve as an alarm indicating the danger.
Up to 10 cm of snow will fall. The wind will be strong to storm force. The old snowpack is faceted. Over a wide area new snow and wind slabs are lying on a weakly bonded old snowpack. The various wind slabs have bonded poorly with each other and the old snowpack.
As a consequence of new snow and wind a precarious avalanche situation will be encountered over a wide area.
Bulletin data: Avalanche Warning Service Tirol, avalanche.report (CC BY 4.0)