Persistent weak layers
- Above 2,300 m
- Size
- 2
Stability: poor · Frequency: few
Often favorable conditions apart from weak layers in old snow
Stability: poor · Frequency: few
Stability: very poor · Frequency: few
Often favorable conditions apart from weak layers in old snow
Danger zones occur particularly in shady steep terrain, unrecognizable. Avalanches can be triggered mostly by large additional loading. Glide cracks and settling noises are signals of danger. If avalanches fracture down to deeper layers of the snowpack they can grow to large size. On steep grassy slopes, and on sunny slopes in general, but increasingly frequently also on shady slopes, small-to-medium glide-snow avalanches are possible. Due to solar radiatilon, loose-snow slides and avalanches can be expected in rocky terrain. Due to solar radiation, loose-snow slides and loose-snow avalanches are possible in rocky terrain.
The fresh fallen snow and fresh drifts from the most recent period of precipitation have settled further and consolidated increasingly. On shady slopes it is still mostly loose, on sunny slopes generally soft but consolidated. On high mostly shady slopes, weak layers are evident inside the old snowpack which avalanches can trigger down to. Snowpack analysis and observations of fractures and isolated artificial triggerings corroborate this.
Nocturnal skies will be star-studded, and thus, very cold. Friday will be cloudless and very mild in the mountains. At 2000m: 0 to +6 degrees. Mostly light NE winds.
No significant change in avalanche danger levels is anticipated.
Bulletin data: Avalanche Warning Service Vorarlberg (CC BY 4.0)