Persistent weak layers
- Above treeline
- Size
- 2
Stability: poor · Frequency: some
Wind slabs and weakly bonded old snow represent the main danger.
Stability: poor · Frequency: some
Wind slabs and weakly bonded old snow represent the main danger.
The fresh snow and the wind slabs formed during the snowfall are lying on top of a weakly bonded old snowpack on west, north and east facing slopes above the tree line. Especially here avalanches can be triggered in the faceted old snow. This applies even in case of a small load. Mostly avalanches are medium-sized. The avalanche prone locations are covered with new snow and are barely recognisable. In the regions neighbouring those that are subject to danger level 3 (considerable) the avalanche danger is a little higher.
Up to 10 cm of snow, and even more in some localities, has fallen. As a consequence of new snow and a moderate southerly wind, mostly small wind slabs formed. The fresh and older wind slabs are lying on top of a weakly bonded old snowpack. They are bonding only slowly with the old snowpack. Distinct weak layers exist in the old snowpack. The old snowpack consists of faceted crystals. The snowpack will be generally subject to considerable local variations.
The fresh wind slabs can be released by a single winter sport participant.
Bulletin data: Avalanche Warning Service South Tyrol, avalanche.report (CC BY 4.0)