With the mild weather, moisture penetration into the snowpack is well advanced. At present, north-facing slopes at altitudes between 2200 and 2600 m are most sensitive to moisture penetration. On east- and west-facing slopes, the critical altitudes are somewhat higher, at approximately between 2500 and 2800 m. On south-facing slopes, moisture penetration extends as far as the high alpine regions. It is especially on these aspects and at these critical altitudes that isolated large or occasionally even very large wet slab avalanches may be triggered naturally. In Grisons in particular, the weak layers in the old snowpack are the least deeply buried, and it is here that wet slab avalanches are likely also to be triggered by human activity. Whumpfing sounds continue to be a possible indication of a weak snowpack.

At higher altitudes, where the snowpack is still dry, the weak layers in the old snowpack must continue to be assessed with caution. However, dry avalanches have been rare in recent days.

The night into Sunday was partly clear, but also partly overcast with some showers, especially in the south. During the day, it was partly sunny in the west and south, and often very cloudy in the northeast with showers.

Fresh snow

A few centimetres locally above approximately 2400 m

Temperature

At midday at 2000 m, between + 3 °C in the north and +7 °C in the west and south

Wind

Light to moderate from westerly directions, becoming stronger at times during showers

Sunday night into Monday will be somewhat cloudy at times in the north and mostly clear in the south. During the day, it will be mostly sunny in the west and south, and partly cloudy in the northeast. Isolated showers are possible in the afternoon.

Fresh snow

A few centimetres are possible locally above approximately 2200 m

Temperature

At midday at 2000 m, between + 1 °C in the northeast and + 5 °C in the west and south

Wind

Light to moderate from westerly directions

On Tuesday, it will be quite sunny after a mostly clear night. During the night into Wednesday, it will be partly cloudy in the south with some showers, with conditions becoming increasingly sunny during the day. In the north, Wednesday will be mainly sunny after a clear night.

The danger of dry avalanches will not change significantly.

The danger of wet avalanches will increase during each day. Off-piste skiing and hut ascents should be completed in good time.