Persistent weak layers
- Above 1,800 m
Caution: small fresh snowdrift accumulations
Caution: small fresh snowdrift accumulations
A single winter sports enthusiast can trigger small slab avalanches in some places, particularly on high-altitude steep shady slopes and in extremely steep terrain. If releases then sweep away deeper weak layers of the snowpack, the avalanche can in isolated cases grow to medium size. In high-altitude ridgeline terrain, small snowdrift accumulations are prone to triggering.
A small amount of fresh snow and drifts lie deposited on top of an often melt-freeze encrusted snowpack surface, otherwise atop surface hoar. Especially on steep shady slopes, the often unfavorable base and intermediate layers of the old snowpack have persisted. In zones with rain impact the snowpack is temporarily weakened.
Nocturnal precipitation will slacken off. Wednesday will be instable and very windy, with limited visibility and intermittent snowfall above 1500m. Temperature at 2000m: -1 degree; at 3000m: -8 degrees. Strong to stormy westerly winds at high altitudes.
As a result of more fresh snowfall and wind, avalanche danger will increase somewhat.
Bulletin data: Avalanche Warning Service Vorarlberg (CC BY 4.0)