Pays d'Enhaut

In the inneralpine regions a sometimes treacherous avalanche situation will prevail

In the inneralpine regions a sometimes treacherous avalanche situation will prevail

A generally favourable avalanche situation will prevail. In very isolated cases avalanches can be released in the old snowpack and reach medium size. These avalanche prone locations are to be found especially at transitions from a shallow to a deep snowpack, when entering gullies and bowls for example. In some localities small wind slabs formed. Careful route selection is recommended. In starting zones where no previous releases have taken place individual medium-sized and, in isolated cases, large gliding avalanches are possible. This applies on sunny slopes below approximately 2400 m, and on shady slopes below approximately 2000 m. Gliding avalanches can be released at any time of day or night. Caution is to be exercised in areas with glide cracks.

In the lower part of the snowpack, particularly on west-facing, north-facing and east-facing slopes above approximately 2200 m, weak layers are evident. In western Lower Valais and on the northern flank of the Alps these ground-level layers are covered over by thick layers of fresher snow so that the likelihood of avalanches being triggered by persons is low. From central Valais over the Ticino as far as Grisons, the snowpack layering is least favourable. In those regions isolated medium-to-large sized avalanches have been triggered by persons in the last few days. The activity of gliding avalanches continues to diminish incrementally. Nevertheless, on steep grass-covered slopes which have not yet discharged, gliding avalanches continue to be possible in isolated cases. In the western and the northern regions where recent snowfall has been heaviest, these releases can grow to large size in some places. During a night of clear skies on Saturday, a melt-freeze crust which is capable of bearing loads will form on the snowpack surface on very steep south-facing slopes. As a consequence of daytime warming and solar radiation, the snowpack surface on steep south-facing slopes will become moist

It was sunny in the mountains during the daytime, following a night of clear skies. Fresh snow: - Temperature: At midday at 2000 m, +5 °C. Wind: Intermittently moderate-to-strong velocity northerly to easterly winds were blowing at high altitudes. Following a night of clear skies it will be sunny in the mountains during the daytime. Fresh snow: - Temperature: At midday at 2000 m, between +4 °C in the western and the southern regions and +1 °C in the eastern regions. Wind: Winds in the central and eastern sectors of the Main Alpine Ridge and southwards therefrom will be northeasterly, blowing at moderate to strong velocity; in the other regions winds will be light to moderate.

It will be sunny in the mountains on both days. The danger of dry-snow avalanches is not expected to change significantly. As a result of lower temperatures, the activity of gliding avalanches will continue to diminish gradually.