Persistent weak layers
- Alle Höhenlagen
Conditions frequently favourable, slight rise in avalanche danger during the daytime
Conditions frequently favourable, slight rise in avalanche danger during the daytime
Avalanche danger is mostly low, in the afternoon danger is moderate. Danger zones occur in steep shady terrain. Transitions from shallow to deep snow require caution, e.g. at entries into gullies and bowls. Due to higher temperatures and solar radiation, small-to-medium, in isolated cases also large-sized wet-snow and glide-snow avalanches are possible on very steep sunny slopes during the course of the day.
On shady slopes, weak intermediate layers are evident. In higher altitude exposed zones, small snowdrift accumulations are prone to triggering. On very steep sunny slopes and at lower altitudes there is a melt-freeze crust in the early morning hours. Elsewhere the snowpack is still powdery. Through daytime warming and solar radiation the snowpack forfeits its firmness on steep sunny slopes.
Nocturnal hours: mostly clear skies, except for a few cirrus clouds. Thursday: in the southern massifs, heavy cloud cover which can hamper the sun. Zero-degree level at midday at about 2200 m, winds intensifying slightly. At 2000 m: +2 degrees. Brisk SW winds, shifting to westerly.
Friday will be variably cloudy to heavily overcast, but hardly any precipitation. Danger of dry-snow avalanches will not change. Danger of wet-snow avalanches will diminish.
Bulletin data: Avalanche Warning Service Vorarlberg (CC BY 4.0)