Persistent weak layers
- Above 2,200 m
- Size
- 3
Stability: very poor · Frequency: many
The snow sport conditions outside marked and open pistes are critical.
Stability: very poor · Frequency: many
Stability: very poor · Frequency: some
Stability: very poor · Frequency: few
Restraint is advisable on this first sunny day after a long period of poor weather.
Winter sport participants can release avalanches very easily, including large ones. This applies in particular on steep slopes above approximately 2200 m. Avalanches can be triggered in the old snowpack. Also on very steep slopes avalanches can be released in the various layers of new snow. Remotely triggered avalanches are possible. The avalanche prone locations are currently prevalent immediately adjacent to the pistes as well. Natural avalanches and whumpfing sounds and the formation of shooting cracks when stepping on the snowpack serve as an alarm indicating the danger. In addition a certain danger of gliding avalanches exists. This applies on steep grassy slopes below approximately 2400 m in the regions with a lot of snow. As a consequence of solar radiation more frequent dry loose snow avalanches are to be expected, even medium-sized ones. This applies on extremely steep slopes. Extensive experience in the assessment of avalanche danger and great restraint are required.
Up to high altitudes rain has fallen. Over a wide area 30 to 50 cm of snow, and up to 80 cm in some localities, has fallen above approximately 2200 m. Large quantities of fresh snow and the wind-drifted snow are lying on top of a weakly bonded old snowpack. This applies above approximately 2200 m. The large quantity of fresh snow and the wind slabs are lying on soft layers. Field observations confirm the existence of a weak snowack.
Outside marked and open pistes a critical avalanche situation will be encountered over a wide area. The meteorological conditions will prevent a rapid change towards better conditions.
Bulletin data: Avalanche Warning Service Tirol, avalanche.report (CC BY 4.0)