Wind slab
- Above treeline
- Dimensione
- 3
Stability: poor · Frequency: some
Fresh wind slabs represent the main danger.
Stability: poor · Frequency: some
Stability: very poor · Frequency: few
Fresh wind slabs represent the main danger.
The fresh wind slabs are prone to triggering above the tree line. They can in some places be released by a single winter sport participant. Caution is to be exercised in particular adjacent to ridgelines and in pass areas, as well as in gullies and bowls. The prevalence of avalanche prone locations and likelihood of triggering will increase with altitude. Avalanches can in very isolated cases penetrate deep layers and reach large size, especially on steep, rather lightly snow-covered shady slopes. As a consequence of warming during the day and solar radiation more frequent loose snow avalanches are to be expected as the day progresses. In addition a certain danger of gliding avalanches exists, especially on steep east, south and west facing slopes below approximately 2400 m in the regions with a lot of snow. Areas with glide cracks are to be avoided as far as possible.
Over a wide area 15 to 30 cm of snow, and up to 50 cm in some localities, has fallen since Thursday above approximately 1500 m. The storm force wind has transported the new snow significantly. The fresh wind slabs are lying on soft layers at high altitudes and in high Alpine regions. Towards its base, the snowpack is faceted. Snow depths vary greatly, depending on the infuence of the wind. Low and intermediate altitudes: The snowpack is moist.
Slight decrease in danger of dry avalanches. Fresh wind slabs are to be evaluated critically. Gliding avalanches require caution.
Bulletin data: Avalanche Warning Service Tirol, avalanche.report (CC BY 4.0)