Waadtländer Voralpen

Snowpack

Last week's fresh snow fell in places on a dry and loose old snow surface, especially in the high Alpine regions on steep northern slopes where dry slab avalanches are most likely to be triggered at the transition to the old snowpack. The instabilities within the layers of fresh and drifted snow have largely stabilised.

The old snowpack is water-saturated on southern slopes up to the high Alpine regions and on eastern and western slopes up to around 3000 m. On northern slopes, most of the old snowpack is water-saturated up to 2600 to 2800 m and wet slab avalanches can still occur at these altitudes, as individual weak layers deep in the snowpack are still dry and become substantially less stable when they first become saturated. This is particularly true in the inneralpine regions of Grisons.

Weather forecast to Monday

In the north, the first half of the night on Monday will still be partly cloudy, but the clouds will start clearing from midnight. During the day, conditions it will be mostly sunny, with local showers or thunderstorms in places in the afternoon. In the south, there will be heavy cloud cover overnight with little precipitation. During the day, conditions will become increasingly sunny, while cumulus cloud will develop in the afternoon and there may be isolated showers.

Fresh snow

Above approximately 2300 m, a few centimetres will fall on the central part of the Main Alpine Ridge.

Temperature

At midday at 2000 m, +7 °C

Wind

Light from various directions

Weather review for Sunday

Conditions were mainly cloudy overnight to Sunday. During the day, conditions were initially sunny in the west and north, but elsewhere mostly cloudy. There was little precipitation, falling as snow above 2300 m, on the Main Alpine Ridge and south of there.

Fresh snow

A few centimetres may fall in places above 2300 m on the Main Alpine Ridge.

Temperature

At midday at 2000 m, +6 °C

Wind

• Moderate at times during the night from the southeast on the northern flank of the Alps
• Elsewhere light from various directions

Outlook

The nights to Tuesday and Wednesday will mostly be clear. Conditions will be mostly sunny in the morning. Cumulus cloud will develop in the afternoon and there may be showers and thunderstorms. The zero-degree level will rise to around 3000 m on Tuesday and to around 3200 m on Wednesday. Winds will be light on both days.

The risk of dry avalanches will continue to decrease, The risk of wet avalanches is subject to daytime changes. Touring skiing should be completed in good time.