Persistent weak layers
- Above 1,900 m
- Größe
- 2
Stability: fair · Frequency: some
Caution to old snowdrift in high altitudes! Moderate avalanche danger but caution when choosing a route within the avalanche zones!
Stability: fair · Frequency: some
Stability: very poor · Frequency: few
Caution to old snowdrift in high altitudes! Moderate avalanche danger but caution when choosing a route within the avalanche zones!
Moderate avalanche danger above 1.900 m, below that: low avalanche danger. Danger is caused by older driftsnow deposits which are located on a weak layers in the old snow in high altitudes and shady slopes. Especially the expositios northeast and east-occasionally south- close to the Alpenhauptkamm behind ridgelines and the beginnings of gullies and bowls are affected. Medium-sized slab avalanches can be triggered with small additional loads. On sunny slopes spontaneous small-sized gliding snow avalanches are possible.
In the past few days the snow was transported firstly to the eastern sector then to the southern and western sectors. Exposed areas are blown-off and icy. Due to wind transfer, there is a bit more snow in gullies and bowls. In shady high slopes there are faceted snow layers in the old snow which can form weak layers. In the past clear nights surface hoar has formed which stays only in shady areas. In sunny sides the surface turns wet or firn-like. On smooth surfaces the snow cover starts gliding on sunny slopes.
Mild and sunny mountain weather on Suturday with just a few thin clouds. Weak northeasterly winds. Temperatures will be around 4 degrees on 2.000 m.
Decreasing avalanche danger in the next few days due to weather stability.
Bulletin data: Avalanche Warning Service Styria (CC BY 4.0)