Wind slab
- Alle Höhenlagen
Older snowdrift accumulations are the main danger
Older snowdrift accumulations are the main danger
Main danger: older snowdrifts. Danger zones occur in steep ridgeline terrain, behind discontinuities and in wind-loaded gullies and bowls and increase in size and frequency with ascending altitude. A small-to-medium slab avalanche or loose-snow avalanche can be triggered by 1 person (sometimes larger). Beware the dangers of being swept along and forced to take a fall. Glide-snow avalanches are still possible, esp. with solar radiation. Caution urged below glide cracks.
Some fresh snow and southerly winds generated small trigger-prone snowdrift accumulations on Tuesday. Fresh and older snowdrifts lie deposited on high-altitude shady slopes atop soft layers or atop older snowdrifts on high-altitude shady slopes. Bonding deteriorates with ascending altitude. Weak trigger-prone layers are evident inside the fresh snowdrift accumulations. Warm ground and the wet snowpack base reinforce the gliding movements of the entire snowpack. Below 1400 m there is little snow on the ground.
Nocturnal hours: Some minor snowfall possible in the evening, the night will be cloudy but dry. Wednesday daytime: Gray skies, a bit of snowfall. Increasing sunshine, starting in Rätikon and Silvretta, especially in high alpine regions. At 2000 m: -1 degree. Light to moderate S/E winds.
Slightly foehn-impacted conditions, radiant sunshine. Danger of dry-snow avalanches will continue to recede. Glide-snow avalanches are still possible.
Bulletin data: Avalanche Warning Service Vorarlberg (CC BY 4.0)