Persistent weak layers
- Above treeline
- Tamaño
- 3
Stability: poor · Frequency: many
Even single freeriders can release avalanches very easily.
Stability: poor · Frequency: many
Stability: poor · Frequency: many
Stability: very poor · Frequency: few
Outside marked and open pistes a dangerous avalanche situation will prevail.
Wind slabs remain prone to triggering on west, north and east facing slopes above the tree line, caution is to be exercised, including in areas close to the tree line. Avalanches can be released in near-surface layers of the snowpack. Additionally avalanches can also penetrate near-ground layers of the snowpack and reach large size on west, north and east facing slopes. Whumpfing sounds and the formation of shooting cracks when stepping on the snowpack and fresh avalanches serve as an alarm indicating the danger. Remotely triggered avalanches are possible in isolated cases. As a consequence of warming during the day and solar radiation moist loose snow avalanches are possible. This applies especially on very steep sunny slopes below approximately 2200 m.
The sometimes strong wind will transport the snow. Further wind slabs will form. The snowpack will be prone to triggering over a wide area. The new snow and wind slabs are lying on top of a weakly bonded old snowpack. Somewhat older wind slabs are lying on surface hoar in some places. Distinct weak layers exist in the bottom section of the old snowpack. This applies in particular on west, north and east facing slopes above the tree line. The weather conditions as the day progresses will give rise to moistening of the snowpack. This applies especially on very steep sunny slopes.
Gradual decrease in avalanche danger.
Bulletin data: Avalanche Warning Service South Tyrol, avalanche.report (CC BY 4.0)