Wind slab
- All elevations
Heed snowdrifts at high altitudes
Heed snowdrifts at high altitudes
Fresh snow and snowdrifts are prone to triggering particularly in ridgeline zones, wind-loaded gullies and bowls and behind abrupt discontinuities in the terrain. They tend to increase with ascending altitude. Small to medium slab avalanches can be triggered by one sole winter sports anthusiast. As a result of daytime warming and in areas where there has been rain impact, slides and small loose-snow avalanches and - on steep grass-covered slopes - small glide-snow avalanches are possible.
Up to 10 cm of fresh snow was and will be transported far-reachingly. Fresh snow and drifts from recent days have settled well and consolidated. They lie deposited atop soft and loose layers or on melt-freeze encrusted old snowpack surfaces. Bonding is only moderate to poor and the proneness to triggering is increasing. Below 1800 m, the snow fell on bare, often warm, ground.
Nocturnal hours: initially gray skies, light to moderate precipitation (snowfall above 1000 m). In the latter part of the night, precipitation will ease, skies will clear. Brisk westerly winds will be blowing. Thursday: dry weather, adequate visibility. Only around midday is a bit of snowfall possible. Still quite windy. At 2000 m: -5 to -2 degrees. Strong to stormy westerly winds.
As a result of strong-to-stormy westerly winds, cloud cover will dominate. Rainfall/snowfall will focus on the northern mountain regions. Strong winds will persist. Avalanche danger levels could increase somewhat.
Bulletin data: Avalanche Warning Service Vorarlberg (CC BY 4.0)