Persistent weak layers
- Above treeline
- Größe
- 2
Stability: poor · Frequency: few
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Stability: poor · Frequency: few
Stability: poor · Frequency: few
Beware of fresh drift snow at high altitudes.
The avalanche danger is assessed as moderate above the tree line. Attention must be paid to the drift snow and persistent weak layers. The danger spots are in the north and east sectors. It cannot be completely ruled out that a snow slab can be triggered by a small additional load. In places, avalanches can tear through layers of old snow close to the ground and become medium-sized. As the weather warms up, wet loose snow slides are also possible from steep rocky and rugged terrain.
10 to 20cm of fresh snow has fallen in the last 24 hours. The largest amount of fresh snow was in the Totes Gebirge, with up to 20cm. Up to 10cm of fresh snow was recorded in the Niedere Tauern. The fresh snow covers hard or icy old snow surfaces. Under the hard layer, the accumulating transformation weakens the snowpack foundation. As it warms up, the new snow becomes sticky up to the middle layers. The snowpack can settle. In general, the snow cover is very unevenly distributed, with little snow from the middle layers downwards.
Wednesday will bring milder air to the mountains again with a westerly current. Winds will pick up at times and break up the clouds during the day. Low residual clouds or fog will persist a little longer south of the main Alpine ridge, but in the afternoon it may become more cloudy again in the northern Alps. There are no signs of significant precipitation anywhere. The wind is blowing briskly from the west. At 2000m above sea level it will be around +2 degrees in the afternoon.
It will remain mild. Thursday will start off overcast, with some snow or rain possible in the western mountain ranges. The weather will improve during the day as a strong south-westerly wind picks up and the sun will shine again and again during the day, especially to the north and east. The temperature will be around 0 degrees at an altitude of 2000m.
Bulletin data: Avalanche Warning Service Styria (CC BY 4.0)