Wind slab
- All elevations
Attention winter sports enthusiasts: fresh snow and fresh snowdrifts are trigger-sensitive
On Friday night, rainfall/snowfall will set in. The fresh snow will be transported far-reachingly at high altitudes. The snowpack remains prone to triggering, avalanche danger levels may rise further.
Attention winter sports enthusiasts: fresh snow and fresh snowdrifts are trigger-sensitive
Fresh snowdrift accumulations are highly prone to triggering, and increase in size and spread with ascending altitude. One person can triggered small-to-medium slab avalanches in gullies and bowls, behind abrupt discontinuities in the terrain. Whumpf noises and glide cracks are signals of danger. Also, on steep, seldom-tracked shady slopes at high altitudes, deeper layers can be triggered by large additional loading. Naturally triggered avalanches are possible in rocky or wind-loaded steep terrain: loose-snow and slab releases, particularly with solar radiation.
Amid strong-to-stormy NW winds the fresh snow will be transported far-reachingly and more trigger-sensitive snowdrift accumulations will be generated, deposited atop an unfavourable snowpack surface, often with surface hoar, melt-freeze crusts or soft layers. Bonding of fresh snow and drifts to the layers beneath them is moderate to poor. At high altitudes esp. on steep shady slopes, older unfavourable layers are evident. These spots are not visible to the naked eye.
Friday: conditions will be pleasant. High-altitude clouds will make some sunshine possible in the morning. In the afternoon, clouds will thicken, the light become diffuse. It will remain partly cloudy in the Bregenzerwald mountains and Prealps. In ridgeline zones and pass areas, stormy-strength winds. At 2000 m: -7 to -3 degrees. Strong to stormy NW winds.
Bulletin data: Avalanche Warning Service Vorarlberg (CC BY 4.0)