Südliches Simplon Gebiet

In high alpine regionsAreas above approximately 3000 m (particularly glaciated areas).EAWS glossary, the new snow and wind-drifted snow are mostly being deposited on a continuous snow coverSnow deposited on the ground in a multiplicity of layers.EAWS glossary. The greatest snow depths are already found along the main Alpine ridge from the Monte Rosa region to the Bernina region. Especially there, faceted weak layersSnowpack layer in which the crystals are poorly bonded and the layer has the potential to fail. Typical crystals in dry weak layers causing avalanches are : precipitation particles; surface hoar; faceted crystals; hollow crystals; graupel. Generally >1mm in size, loose grains with few bonds Wet weak layers can be formed by all snow crystal/grain types.EAWS glossary are partly present in the old snowpackSnow layers deposited from earlier precipitation, prior to fresh fallen snow. Old snow layers consist of metamorphosed snow crystals.EAWS glossary, so that fractures at the interface between the old and new snow are possible. Elsewhere, weak layers are to be expected mainly within the different layers of new snow and wind-drifted snow.

Sunday

On Sunday, skies will be heavily overcast in the north, with widespread precipitation. Precipitation amounts are uncertain. Along the northern Alpine ridge and in Valais, 20 to 40 cm of fresh snow are possible at high altitudes. The snowfall level will rise from 1500 m to around 2600 m during the night leading into Sunday. In the south, it will remain mostly dry with sunny intervals. Strong to storm-force winds will blow from westerly directions.

As the snowfall level rises, the snowpackSnow deposited on the ground in a multiplicity of layers.EAWS glossary will become moist or wet up to high altitudes. Increasing numbers of small and medium-sized wet loose snow avalanches are to be expected. With new snow and wind the danger of dry avalanches will increase slightly in high alpine regionsAreas above approximately 3000 m (particularly glaciated areas).EAWS glossary.

Monday

On Monday, skies will be cloudy at times in the north, otherwise mostly sunny. The zero degree level will rise to above 3000 m during the day. Light to moderate winds will blow from westerly directions.

The danger of dry avalanches will decrease, but only slowly in high alpine regionsAreas above approximately 3000 m (particularly glaciated areas).EAWS glossary. With solar radiation, moist loose snow slides and avalanches are to be expected on steep slopes in high alpine regions. In addition to the danger of burial, particular attention should also be paid to the danger of being swept along and falling.