Lawinenlagebericht

Lechquellen Mountains

LWD Vorarlberg
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Lawinengefahr

All elevations· Vormittag
2 · Mässig
Above 2,800 m· Nachmittag
2 · Mässig
Below 2,800 m· Nachmittag
3 · Erheblich
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Kernpunkte

Naturally triggered avalanches expected during course of day

Lawinenprobleme

  • Wet snow· Vormittag

    • Below 2,500 m

  • Persistent weak layers· Vormittag

    • Above 2,500 m

  • Wet snow· Nachmittag

    • Below 2,800 m

  • Persistent weak layers· Nachmittag

    • Above 2,500 m

Avalanche Activity

Rapidly rising wet-snow avalanche danger during course of day

In areas with starkly reduced nocturnal longwave outgoing radiation, the frequency of danger zones will swiftly increase due to daytime warming and initially diffuse solar radiation. Persons can trigger wet slab avalanches in afternoon and naturally triggered avalanches can be expected in all aspects below about 2500m and above that on sunny slopes. Caution urged on on steep shady slopes at 2200-2500m if the breakable crust breaks through or in case of large sink-in depths. Particularly there, wet-snow avalanches can fracture and grow to large size. Avalanche can plummet into steep gullies and green zones. Backcountry tours and ascents to refuges need to be launched early and come to an end early. In addition, winter sports enthusiasts can trigger isolated avalanches in near-surface weak layer on high-altitude shady slopes. Such danger zones are impossible to recognize.

Snowpack Structure

As a result of reduced outgoing radiation, the snowpack can hardly freeze at night. At altitudes of 1800-2500m the ground level rotten snow is thoroughly wet even on north-facing slopes and prone to triggering. On high-altitude shady slopes there are unfavorable intermediate layers in the uppermost layer of the snowpack which in places can be triggered. A thick mid-section of compact layers blankets the deep hoar and faceted crystals at the base of the snowpack.

Weather Forecast

During the night, moist air masses will move in, skies will be partly cloudy. In early morning, clouds will disperse, the diffuse light will turn to sunshine. During the course of the day, residual clouds and convective cloud build-up are expected. Temperature at 2000m: +5 degrees; at 3000m: -2 degrees. Light westerly winds at high altitudes.

Tendency

Increasing impact from a high-pressure front will bring dry, predominantl sunny days and nights of clear skies. Avalanche danger will increase with the daily daytime danger cycle (daytime warming and solar radiation).

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

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