Bollettino valanghe

Allgäu Alps West

LWD Vorarlberg
Vedi sulla mappa

Pericolo valanghe

Above treeline
4 · Forte
Below treeline
3 · Marcato
Non aggiornato — questo bollettino è scaduto 5 months ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Naturally triggered avalanches can be expected.

Problemi valanghivi

  • New snow

    • Above treeline
  • New snow

    • Below treeline
  • Persistent weak layers

    • Above 2,200 m
  • Gliding snow

    • Below 2,000 m

Avalanche Activity

For all activities apart from secured ski slopes: conditions are critical regionally.

As a result of large amounts of fresh snow and drifts, naturally triggered slab avalanches can ongoingly be expected. They can also be large-sized and plummet even over flattish parts of slopes. As the precipitation tapers off, naturally triggered avalanche activity will diminish during the course of the day. One single winter sports enthusiast can easily trigger avalanches which pour over flat passages in the terrain. Danger zones are widespread. For all activities apart from secured ski slopes, conditions are extremely critical. On south-facing slopes the fresh fallen snow blankets the terrain which previously was bare of snow, so it is beginning to glide away. In case of solar radiation, moist slides of the fresh snow can be expected during the afternoon.

Snowpack Structure

Since Wednesday, 60-70cm of fresh snow has been registered. The snowfall was accompanied by strong-to-storm strength NW winds, thereby generating often large-sized, trigger-sensitive snowdrift accumulations. In the interim there have also been repeated showers of graupel. Tonight, an additional 10cm of fresh snowfall is anticipated. Fresh snow and drifts lie deposited atop a loosely-packed surface on shady slopes, atop a melt-freeze crust on sunny slopes. Beneath a further melt-freeze crust in the uppermost third of the snowpack there are often faceted crystals. The mid-section of the snowpack consists widespread of well consolidated, compact layers which on shady high altitude slopes blanket a poorly-structured old snowpack fundament.

Weather Forecast

Low-lying cloud cover will hamper visibility. Snow showers will taper off during the morning. In afternoon, possible windows of sunshine, particularly in high alpine regions. Temperature at 2000m: -11 degrees; at 3000m: from -16 degrees. Brisk northeasterly winds at high altitudes.

Tendency

The danger of dry-snow avalanches is diminishing. Due to solar radiation, moist slides can be expected from the fresh fallen snow during the course of the day.

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

Regioni coperte