Persistent weak layers
- Above 2,200 m
Isolated avalanche prone locations in persistent weak layer of old snow.
Isolated avalanche prone locations in persistent weak layer of old snow.
In isolated cases avalanches can be triggered from persistent weak layers on very steep shady slopes. These releases are mostly small-sized. The risks of falling and sustaining injuries outweigh those of being buried in snow masses.
The crusts which were generated overnight - breakable to capable-of-bearing-loads - soften up during the course of the day on sunny slopes, on shady slopes often remain frozen hard. The shallow snowpack is generally well consolidated and low in tensions. On shady slopes in high alpine regions, isolated weak layers still occur inside the snowpack. South-facing slopes are bare of snow up to high altitudes. Since there is only little transportable snow, increasing southerly winds in the foehn-exposed mountain regions can generate only small snowdrift accumulations. Only little information is currently available to the Avalanche Warning Service from outlying terrain.
High-altitude clouds will often create quite diffuse light conditions and perturbed sunshine in the morning hours, but by afternoon the clouds are expected to become thinner. Continuingly mild temperatures for this juncture of the season. Temperature at 2000m: -1 to -4 degrees, at 3000m: -2 degrees. Moderate to brisk southerly winds at high altitudes, increasing to strong velocity in the foehn-exposed mountains.
Avalanche danger expected to remain low
Bulletin data: Avalanche Warning Service Vorarlberg (CC BY 4.0)