Aigle-Leysin

Moderate avalanche danger will be encountered over a wide area. Wind slabs require caution.

Snowpack

Snow layering is mostly favourable north of the Rhône-Rhine line. Especially in the inneralpine regions of Valais and Grisons and on the southern flank of the Alps, weak layers deep in the snowpack may still be released in some places. Especially in the west, new fallen snow and wind may result in fresh snowdrift accumulations, some of which may be prone to triggering. Below around 2200 m, layers of the snowpack that are near the ground are sometimes moist. This means that gliding avalanches are still to be expected. In many areas, there is about twice as much snow as there normally is at the beginning of December. Only on the southern flank of the Alps are snow depths below average.

Weather forecast through Friday, 08.12.2023

Overnight cloud will increase from the west. During the day it will be mostly very cloudy. Snow will fall occasionally, mostly in the west.

Fresh snow

The snowfall level will rise rapidly in the west and north from low altitudes to around 1500 m in the west and 1200 m in the east, while it will remain low for longer in the inneralpine regions. In the south it will remain at low altitudes. Above that, the following amounts of snow will fall:

• extreme west of Lower Valais: 10 to 15 cm;
• western and central parts of the northern flank of the Alps, rest of Lower Valais: 5 to 10 cm;
• elsewhere: to a lesser extent.

Temperature

At midday at 2000 m, between -2 °C in the north and -4 °C in the south.

Wind

Winds will blow from the west:

• mostly moderately during the night;
• easing during the day.

Observed weather review Thursday, 07.12.2023

It was mostly sunny in the mountains.

Fresh snow

During Wednesday night, a few centimetres of fresh snow were registered down to low altitudes, especially on the central and eastern part of the northern flank of the Alps and in northern Grisons.

Temperature

At midday at 2000 m, between 0 °C in the far west and -8 °C in the southeast.

Wind

The winds turned from north to west and blew:

• moderately to strongly during the night at high altitudes;
• otherwise mostly at weak to moderate strength.

Outlook through Sunday, 10.12.2023Saturday

Once the precipitation ends during Friday night, it will be quite sunny during the day. It will turn milder. As the day progresses, the westerly wind will increase appreciably. The avalanche danger will increase somewhat, especially on the northern flank of the Alps.

Sunday

During Saturday night, precipitation will fall in the north, mostly on the northern flank of the Alps, which will see 15 to 30 cm. The precipitation will end on Sunday morning. It will remain dry in the far south. The snowfall level will initially be above 2000 m before dropping to around 1200 m. On Sunday afternoon it will become increasingly sunny in the south and from the west. The avalanche danger will increase across the board, especially on the northern flank of the Alps.