Bulletin d’avalanche

Stub and Gleinalpe

LWD Steiermark
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Danger d’avalanche

Above 1,400 m
2 · Modéré
Below 1,400 m
1 · Faible
Périmé — ce bulletin a expiré 3 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Main danger: glide-snow avalanches. Beware snowdrift patches on shady slopes.

Problèmes avalancheux

  • Gliding snow

    • Toutes altitudes
  • Wet snow

    • Toutes altitudes

Avalanche Activity

Main danger: glide-snow avalanches. Beware snowdrift patches on shady slopes.

At intermediate altitudes, avalanche danger is moderate. Main danger: glide-snow avalanches, confirmed by many observers. In very steep wooded and grassy terrain, esp. on sunny slopes, glide-snow avalanches can be expected, usually medium-sized. Avoid zones below glide cracks. In places, naturally triggered loose-snow avalanches threaten: on very steep sunny slopes which have not yet discharged. Likelihood of triggering increases during the day. Snowdrift accumulations settled and calmed. In high-altitude shady terrain where there are reserves of cold in the snowpack, snowdrifts can be triggered as slab avalanches.

Snowpack Structure

Due to strikingly higher temperatures the snowpack was able to settle up to high altitudes. During the night of clear skies the snowpack surface will consolidate. Solar radiation and extremely mild temperatures will make the snowpack forfeit its firmness on sunny slopes and destabilize it, generating more naturally triggered moist avalanches. As the snowpack becomes wetter, gliding snow activity will increase on very steep, sunny slopes. Trigger-sensitive snowpack accumulations lie deposited atop a melt-freeze encrusted snowpack surface in isolated cases at high altitudes. Weak layers lie inside the drifted masses (soft layers, graupel).

Weather Forecast

Following a night of largely clear skies, sunny and mild weather will reign further on Tuesday. Moderate westerly winds At 2000 m: +8 degrees, evan at 3000 m on the Dachstein temperatures will be above zero. Excellent visibility in the dry air.

Tendency

On Tuesday night low-pressure effects will creep in from the northwest, bringing cold air masses. On Wednesday on the northern flank of the Alps, some precipitation amid intensifying NW winds. At 2000 m at midday: -5 degrees. The wet-snow problem will recede, the gliding snow problem will persist. Slightly rising snowdrift problem, depending on the amount of fresh snow.

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

Régions couvertes