Wind slab
- Above treeline
Fresh wind slab on a persistent weak layer
Fresh wind slab on a persistent weak layer
The avalanche risk is moderate above the tree line. Fresh pillows of wind drifted snow can be triggered in a few places, especially in steep terrain exposed to the east. In the northern and eastern exposures, there is also still a persistent weak layer problem at altitudes above the tree line. If the old snowpack is torn through, the avalanches can sometimes reach medium size. Caution in the area of terrain traps. Sunny slopes can release wet slides from very steep slopes.
There is still significantly less snow than average. A thin, partly bound snowpack covers a very variable and mostly hard old snowpack. There is significantly more snow in shady gullies and bowls than on sunny slopes, some of which are partly bare up to 2000 metres. In the northern and eastern exposures, the snowpack is still weakened by layers with faceted crystals and floating snow (persistent weak layer problem!).
During the night to Sunday, fog will form in many places, reaching up to 2000 metres. With a weak high-pressure influence, the high fog will lift in places during the day, with sunshine coming through, especially on the northern side of the Alps and in the western mountain groups; in general, the higher peaks around 2000 metres should be clear everywhere. Unproductive precipitation may fall from the fog in places. Temperatures at 2000 metres will be between -4 and -1 degrees, at 1500 metres between -2 and +1 degrees. The wind will be light from westerly directions.
Increased clearing on the northern side of the Alps with foehn-like southerly winds. No significant change in the avalanche danger.
Bulletin data: Avalanche Warning Service Styria (CC BY 4.0)