Bulletin d’avalanche

Bregenzerwald Mountains

LWD Vorarlberg
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Danger d’avalanche

Above 1,800 m
2 · Modéré
Below 1,800 m
1 · Faible
Périmé — ce bulletin a expiré 3 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Heed fresh snowdrift accumulations at increasing altitudes

Problèmes avalancheux

  • Wind slab

    • Toutes altitudes
  • Persistent weak layers

    • Toutes altitudes

Snowpack Structure

The latest round of fresh snow and drifts is bonding poorly with the old snowpack, particularly on shady slopes. On shady slopes at high altitudes there is still powder or surface hoar. On south-facing slopes at high altitudes there is a melt-freeze crust or wind-pressed surfaces. On very steep shady slopes in particular, unfavourable intermediate layers are evident.

Avalanche Activity

Heed fresh snowdrift accumulations at increasing altitudes

At high altitudes partly moderate, but mostly low avalanche danger prevails. Fresh snowdrift accumulations on steep shady slopes are prone to triggering. Danger zones lie behind abrupt discontinuities in the terrain and in wind-loaded gullies and bowls. They increase in frequency with ascending altitude and over the course of the day. Apart from the risks of being buried in snow masses, the danger of falls needs to be taken into consideration. Weak layers inside the old snowpack are triggerable in very isolated cases by large additional loadin. They are found esp. on very steep NW/N/NE facing slopes above 2500 m and in transitions from shallow to deeper snow.

Weather Synopsis

Nocturnal hours: in the early part of the night it will be dry, skies will be clear with scattered clouds. In early morning cloud cover will move in. Friday: after clouds withdraw and a few snow showers come to an end there will be a morning phase of dry weather with brisk SW winds. Later in the day, visibility will deteriorate, snowfall will set in, winds will intensify. At 2000 m: +1 degree. Brisk winds to start with, later on intensifying further, from W/SW.

Tendency

Saturday will start with some snowfall and limited visibility. Temperatures will drop, strong-to-stormy NW winds will be blowing. Avalanche danger levels at high altitudes can increase.

Bulletin data: Avalanche Warning Service Vorarlberg (CC BY 4.0)

Régions couvertes