Persistent weak layers
- Above 2,400 m
- Size
- 3
Stability: poor · Frequency: some
Weakly bonded old snow represents the main danger. Fresh wind slabs require caution.
Stability: poor · Frequency: some
Stability: poor · Frequency: some
Stability: very poor · Frequency: some
Weakly bonded old snow represents the main danger. Fresh wind slabs require caution.
Avalanches can be triggered in the old snowpack and reach large size in isolated cases in particular on very steep west, north and east facing slopes. Such avalanche prone locations are to be found above approximately 2400 m. Above the tree line the wind slabs will increase in size additionally. Even single winter sport participants can release avalanches, including medium-sized ones, especially on steep shady slopes. The number and size of avalanche prone locations will increase with altitude. On steep grassy slopes medium-sized gliding avalanches are possible, especially on sunny slopes below approximately 2400 m.
Over a wide area 20 to 40 cm of snow, and even more in some localities, has fallen above approximately 1500 m. As a consequence of the sometimes strong wind the wind slabs will increase in size additionally. In some cases new snow and wind slabs are lying on a weakly bonded old snowpack, in particular on steep west, north and east facing slopes above approximately 2400 m.
The conditions will prevent a rapid stabilisation of the snowpack. In addition further gliding avalanches are to be expected. Some loose snow avalanches are possible, in the event of prolonged bright spells in particular on extremely steep slopes.
Bulletin data: Avalanche Warning Service Tirol, avalanche.report (CC BY 4.0)