Zervreila

North of a line from the Rhône to the Rhine and in the extreme west of Lower Valais, 2 to 3.5 m of snow have fallen over the last two weeks. As a result, weak layers in the old snowpack below are thickly covered and can only rarely be triggered by human activity. However, avalanches may become very large.

South of a line from the Rhône to the Rhine, the persistent weak layers that have persisted since the beginning of January are still pronounced. During the night, a crust forms on the surface of the snowpack in many places. The snowpack appears more stable as a result and danger signs such as cracks or whumpfing sounds become less frequent. However, the low-lying weak layers still exist and avalanches can still be triggered by human activity and become large. In Grisons, avalanche-prone locations are still common. In southern Valais, the significant weak layers in the lower part of the snowpack are mostly rather more thickly covered. Avalanche-prone locations where avalanches can be triggered in the weak old snowpack are therefore less frequent and mainly located in areas with relatively little snow.

With the rise in temperature through the day, the likelihood of dry slab avalanches being triggered increases slightly during the day. In addition, gliding avalanches are to be expected on steep grassy slopes and wet avalanches on sunny slopes.

After a clear night, conditions were sunny and very mild in the mountains.

Fresh snow

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Temperature

At midday at 2000 m, between +8 °C in the north and +5 °C in the south

Wind

Light

After a clear night, it will be sunny and will continue to be mild with a zero-degree level at around 3000 m.

Fresh snow

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Temperature

At midday at 2000 m, around +5 °C

Wind

Light

Clear nights will be followed by sunny days. On Saturday, clouds will gather from the west in the afternoon. It will remain mild, with the zero-degree level at just under 3000 m on Friday and around 2500 m on Saturday. The wind will be light and at times moderate from the west.

The danger of dry avalanches will continue to decrease, but only very slowly in southern Valais, Ticino and Grisons due to the pronounced weak layers. Gliding avalanches are still to be expected, as well as wet avalanches on sunny slopes. These may become large in the west and north.