Wind slab
- Above treeline
- Dimensione
- 2
Stability: very poor · Frequency: some
A sometimes precarious avalanche situation will prevail.
Stability: very poor · Frequency: some
Stability: poor · Frequency: some
A sometimes precarious avalanche situation will prevail.
Wind slabs are very prone to triggering in all aspects above the tree line. These can be released in near-surface layers. Avalanches can also penetrate near-ground layers of the snowpack and reach medium size on west, north and east facing slopes. Natural avalanches are to be expected. This applies especially at the base of rock walls and behind abrupt changes in the terrain. In addition an appreciable danger of loose snow avalanches exists. Gliding avalanches can also occur, especially on cut and grassy slopes.
20 to 30 cm of snow, and even more in some localities, will fall. The wind will be storm force. The northwesterly wind will transport the new snow significantly. Extensive wind slabs will form. The new snow and wind slabs will be deposited on the unfavourable surface of an old snowpack above the tree line. The old snowpack will be weakly bonded, especially on west, north and east facing slopes above approximately 2200 m, and on south facing slopes at elevated altitudes.
As a consequence of a sometimes storm force wind from northerly directions, further wind slabs will form on Friday. Avalanches can be released easily.
Bulletin data: Avalanche Warning Service South Tyrol, avalanche.report (CC BY 4.0)