Persistent weak layers
- Above 1,900 m
- Size
- 2
Stability: fair · Frequency: some
Persistent weak layers in high altitudes! Wet- and gliding snow avalanches on sunny slopes are possible.
Stability: fair · Frequency: some
Stability: very poor · Frequency: few
The high pressure system persits, no significant change of the avalanche danger.
Persistent weak layers in high altitudes! Wet- and gliding snow avalanches on sunny slopes are possible.
Moderate avalanche danger above 1.900 m, below that: low avalanche danger. Danger spots are located in high shady slopes behind ridgelines and in the beginnig of gullies and bowls as well as steep slopes. Slab avalanches within the old snow can be triggered by small additional load and can reach medium sizes especially in transition areas from thin to thicker snow covers. on sunny slopes increasing danger of small spontaneous wet- or gliding snow avalanches. Avoid areas below glide cracks.
During the night surface hoar will form on sunny slopes with different amounts. It will soften during the course of the day. Summits are blown-off and icy or bare, gullies and bowls are filled with old snowdrift. In shady high altitudes faceted snow within the old snow form weak layers. In Basinds surface hoar has formed which lasts only in shady areas. the snow cover is getting moist and firn-like in sunny areas. The snow cover begins gliding on smooth surfaces in sunny areas.
In the area of the eastern Alps a high-pressure system persits during new year´s Eve. Afte a clear night, clear skies will dominate the mountain weather. Weak southwesterly to westerly winds, in the northern Alps the winds will be moderate in exposed areas. Temperatures will be around 4 degrees on 2.000 m an 6 degrees on 1.500 m.
Bulletin data: Avalanche Warning Service Styria (CC BY 4.0)