östliche Berner Voralpen

Snowpack

Particularly on north-facing slopes, the new snow is falling on an unfavourable old snow surface consisting of faceted, soft layers. On south-facing slopes, the surface of the snowpack is characterised by warmth and the consequence of solar radiation and is more favourable.

In southern Valais, Ticino and Grisons, the old snowpack is also often faceted and loose. Very occasionally, avalanches may still be triggered in deep layers of the snowpack in these regions.

In the north, the foehn wind has formed thin, hard snowdrift accumulations on north-facing slopes, some of which are still prone to triggering. Otherwise, the old snowpack in these regions is usually well consolidated.

During the overcast night and with some rain up to around 1800 m, the outgoing longwave radiation is appreciably reduced during the night. With solar radiation, the danger of wet avalanches will therefore increase somewhat as the day progresses despite falling temperatures.

Weather forecast to Monday

During the night there will be widespread precipitation, mostly in the south. The snowfall level will be between 1600 and 1800 m in the north and between 1200 and 1600 m in the south. During the day it will be cloudy on the southern flank of the Alps, otherwise partly sunny.

Fresh snow

Above approximately 2000 m until Monday afternoon:

• Main Alpine Ridge from the Saas Valley to the Bernina Pass and south of here: 15 to 30 cm
• Northern Alpine Ridge, rest of Main Alpine Ridge, rest of Engadine: 5 to 15 cm
• elsewhere less or dry

Temperature

At midday at 2000 m, between 0 °C in the north and -2 °C in the south.

Wind

• Strong to storm force foehn wind from the south during the first half of the night
• The foehn wind will then ease off; during the day mostly light to moderate from the south

Weather review for Sunday

After a partly clear night, it was quite sunny in the late morning. At around midday, clouds moved in from the west and south.

Fresh snow

-

Temperature

At midday at 2000 m, between +5 °C in the north and 0 °C in the south.

Wind

• Moderate to strong southerly winds, partly stormy on the Northern Alpine Ridge
• Moderate to strong foehn wind from the south in the Alpine valleys of the north

Outlook

On Tuesday it will be partly sunny in the north, very cloudy in the south and there will be little precipitation. On Wednesday, some precipitation will fall in all regions, mostly in the south with 10 to 20 cm. The quantities are still uncertain. The snowfall level will be between 1400 and 1600 m. The wind will be mostly light to moderate from southerly directions.

The avalanche danger will not change significantly.