Lawinenlagebericht

Waadtländer Voralpen

SLF
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Lawinengefahr

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1 · Gering
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Kernpunkte

A widespread favourable avalanche situation will prevail

Tendency

Following nights of clear skies it will be sunny during each day. As a result of predominantly light northeasterly winds it will be relatively cool, somewhat warmer on Monday in the western and the southern regions. The avalanche situation is predominantly favourable. The persistent weak layer which is a latent threat will persist, however.

Weather Synopsis

Following a night of partially clear skies it was sunny over widespread areas during the daytime hours. Fresh snow: - Temperature: At midday at 2000 m, between -2 °C in the western regions and -7 °C in the eastern regions. Wind: Winds at high altitudes were blowing at moderate strength from northerly directions during the nocturnal hours, otherwise blowing predominantly at light strength. Following a night of clear skies it will be sunny during the daytime hours. In the furthermost southern regions skies will be overcast during the night and in early morning. Fresh snow: - Temperature: At midday at 2000 m, -7 °C. Wind: Winds will be blowing mostly at light strength, at moderate strength in high alpine regions, from northeasterly directions.

Avalanche Activity

A widespread favourable avalanche situation will prevail

Individual avalanche prone locations are to be found in particular on extremely steep slopes, especially in little used backcountry terrain. Mostly the avalanches are small. Apart from the danger of being buried, restraint should be exercised in particular in view of the danger of avalanches sweeping people along and giving rise to falls.

Snowpack Structure

In the southern Valais as well as in the inneralpine and southern regions of Grisons, there are weak layers which are embedded inside the snowpack. From these layers, isolated large-sized avalanches were triggered by persons during the last week, in some cases by remote triggering. This week there have been no such triggerings reported thus far. In the remaining regions of Switzerland the snowpack layering is more favourable. Nevertheless, stability tests show fractures in the near-surface layers also in some places in those regions. On the northern flank of the Alps more than anywhere else, gliding avalanches continue to be possible in isolated cases. In the southern regions there is unusually little snow on the ground, at numerous measurement stations less than has ever before been measured at this juncture of the season. As a consequence of the thin, often expansively metamorphosed (faceted) snowpack there is currently heightened danger of falling into crevices on the glaciers, in particular in the regions of Zermatt and Saas Fee.

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

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