Bollettino valanghe

südliches Urseren

SLF
Vedi sulla mappa

Pericolo valanghe

All elevations
2− · Moderato
Non aggiornato — questo bollettino è scaduto 2 years ago. Stai vedendo condizioni passate, non il bollettino in corso.

Problemi valanghivi

  • Wind slab

    • Above 2,400 m
  • Wet snow

    • Below 2,000 m

Snowpack Structure

Snowpack

With new snow and sometimes stormy westerly winds, wind slabs that are prone to triggering will form at high altitudes, even at a distance from ridgelines. Apart from that, the snowpack, which is still thin in many places, is mostly favourable with only isolated weak layers, mostly in the area of thin melt-freeze crusts.

Above 2800 m, where there was already a cohesive old snowpack before the snowfall in the second half of November, there are some weak layers of angular crystals on northern slopes. In these, isolated avalanches may be triggered in near-ground layers.

In the west and north, the snowpack will become moist with rain below approximately 2000 metres.

Weather Forecast

Weather forecast until Friday, 06.12.2024

Snow will often fall in the north, especially during the night and on Friday morning. On Friday afternoon it will be cloudy, but mostly dry. The snowfall level will increase during Thursday night to 2200 m in the west, to around 2000 m in the east and will fall to around 1200 m by midday on Friday. In the south, a little snow will fall along the Alps. During the day it will be quite sunny in the far south.

Fresh snow

From Thursday afternoon to Friday afternoon, the following amounts of fresh snow are expected above approximately 2400 m:

  • Northern Alpine Ridge, Lower Valais, Prättigau: 15 to 30 cm, from the Bernese Oberland to Liechtenstein locally up to 40 cm
  • Rest of Valais, other parts of northern Grisons, Lower Engadine north of the Inn: 5 to 15 cm
  • Less elsewhere, very dry in the south

Temperature

At midday at 2000 m, -2 °C in the north and 2 °C in the south.

Wind

Strong to stormy initially from the west, veering northwest during the course of the day.

Weather Review

Weather review for Thursday, 05.12.2024

It was quite sunny. During the course of the day, clouds moved in from the west.

Fresh snow

-

Temperature

At midday at 2000 m, around -4 °C.

Wind

There will be light to moderate westerly to northerly winds.

Tendency

Outlook until Sunday, 8 December 2024

It will be very cloudy. Snow will start to fall again from Saturday afternoon. The snowfall level will be around 2000 m as the precipitation begins and will drop to low altitudes by Saturday evening. From Saturday midday to Sunday afternoon, 30 to 50 cm of snow will fall widely on the northern flank of the Alps above approximately 2000 m, and up to 70 cm in the far west. Around 20 cm of snow will fall in the rest of southern Valais and Grisons, and only a few centimetres in Ticino. There will be strong winds, initially from the west, then from the north on Sunday.

With the exception of the very south, the avalanche danger will increase everywhere to considerable (level 3) in the regions exposed to heavier precipitation. Naturally triggered avalanches are also to be expected on Sunday.

Bulletin data: WSL Institute for Snow and Avalanche Research SLF (CC BY 4.0)

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