Persistent weak layers· Mattina
- Above 2,400 m
Caution on very steep shady slopes in high-alpine zones. Beware daytime rise in temperature.
Caution on very steep shady slopes in high-alpine zones. Beware daytime rise in temperature.
The recent snowdrifts are still prone to triggering, one sole skier can trigger small-to-medium sized avalanches. Danger zones occur in very steep NW/N/NE-facing slopes which are difficult to recognize, they increase with ascending altitude. Backcountry tours require an well-considered route selection. Avalanche danger increases during the course of the day. Particularly in intensively sun-bathed steep terrain, increasingly also on shady slopes, small-to-medium wet-snow avalanches are possible. The danger of small, in isolated cases medium-sized glide-snow avalances remains difficult to assess. Backcountry tours need to be brought to a close early in the day.
At high altitudes, unfavorable intermediate layers in the old snowpack are evident. Bonding deteriorates with increasing altitude, especially in the uppermost and between intermediate layers. On steep shady slopes the uppermost layers of the snowpack are often soft, on sunny slopes already bonded and in the early morning hours capable of bearing loads. The snowpack is throughly wet up to high altitudes but all-in-all well consolidated. Due to daytime rise in temperatures and solar radiation, the snowpack weakens as the day unfolds.
Dry, cool, star-studded skies at night. Saturday will be sunny with good visibility. In afternoon, harmless convective cloud build-up. At 2000m: +7 degrees. Moderate-strength northerly winds.
Danger of dry-snow avalanches not expected to change in high alpine zones. Due to dropping temperatures on Sunday, danger of wet-snow avalanches will diminish. Glide-snow avalanches are still difficult to predict.
Bulletin data: Avalanche Warning Service Vorarlberg (CC BY 4.0)