Rothenthurm

With some new snow and westerly winds, snowdrift accumulations that are prone to triggering developed on Friday and during the night to Saturday. They are largest in the west, where the most snow fell.

Snowpack structure is unfavourable in many locations in southern Valais, Ticino and Grisons, with distinct weak layers in the middle and lower part of the snowpack that are prone to triggering. Reports of whumpfing sounds and avalanches triggered by human activity, some from a distance, continue to be received from these regions. Snowpack structure is somewhat more favourable on the northern flank of the Alps and in northern Valais, but there are weak layers deeper in the snowpack in these regions too. These may still be triggered, especially where there is little snow and at transitions from a deep to shallow snowpack.

A little snow fell in the north during the night. During the day, it was partly sunny in the south and quite sunny in the north.

Fresh snow

From Friday afternoon to Saturday morning above approximately 1400 m, a few centimetres in the north

Temperature

At midday at 2000 m, around -2 °C

Wind

Mostly light

It will be cloudy with bright spells. Most of the sunshine will be in the east in the late morning.

Fresh snow

-

Temperature

At midday at 2000 m, around -2 °C

Wind

Light

On Monday, it will be mostly cloudy in the south and fairly sunny in the north. The avalanche danger will decrease, but only very slowly in Valais, Ticino and Grisons due to the weak snowpack structure. On Tuesday, snowfall and strong westerly winds will set in from the west. Snow will fall to below 1000 m at first, then the snowfall level will rise as the day progresses. The avalanche danger will increase as the day progresses, especially in the west.