Vallon de Saint-Imier

The fresh snow and wind slabs are lying on soft layers, especially on slopes that are protected from the wind, and in some places surface hoar has also covered by snow. Overnight to Monday, the wind slabs will continue to grow in size, especially on the central and eastern parts of the northern flank of the Alps. In addition, the rain has caused the snowpack to become wet and also weakened it up to 2400 m. With the partly cloudy night and the sun on Monday, more wet and gliding avalanches are to be expected.

On shady slopes above approximately 2400 m and in the high Alpine regions in general, there are faceted weak layers deep in the old snowpack. With the new and drifted snow, fractures are again possible in isolated cases. Avalanches may then become large.

It was very cloudy with light precipitation at first, which became heavier in the afternoon from the west. The snowfall level was around 1500 m and rose to 2200 m in the west.

Fresh snow

From Saturday night to Sunday afternoon, the following amounts fell above approximately 2400 m in the west and 1800 m in the east:

• Northern flank of the Alps west of the Reuss, Valais: 20 to 30 cm.
• Northern flank of the Alps east of the Reuss, rest of the Gotthard region: 10 to 20 cm
• Grisons, Ticino not including the Gotthard region: less than 10 cm, dry in the very south

Temperature

At midday at 2000 m, around +1 °C

Wind

Southwesterly:

• Strong in the north and at high altitudes in general, storm force at times in the west
• Light to moderate in Grisons

Intense precipitation will fall in the north on Sunday evening. The snowfall level will rise to around 2200 m. In the west, the precipitation will end during the night and it will be mostly sunny during the day. The last precipitation will fall in the late morning in the east, then it will remain partly cloudy. It will be dry and fairly sunny in the south.

Fresh snow

From Sunday afternoon to Monday morning, the following amounts are expected to fall above approximately 2400 m:

• Northern flank of the Alps east of the Kandertal, as well as Prättigau, Silvretta, Samnaun: 20 to 30 cm.
• Rest of northern flank of the Alps, rest of northern Grisons: 10 to 20 cm
• Elsewhere less than 10 cm across a wide area, dry in the very south

Temperature

At midday at 2000 m, around +4 °C

Wind

From the west:

• Strong during the night in the north and generally at high altitudes, storm force at times
• Mostly moderate during the day, easing off as the day progresses

Tuesday and Wednesday will be fairly sunny and mild. The zero-degree level will be around 3400 m. There will be a light to moderate southwesterly wind.

The risk of dry avalanches will decrease. Gliding avalanches are still possible on steep grassy slopes. In addition, moist snow slides are also possible during the day at high altitudes on steep sunny slopes.