Goldberg Group Central

During the daytime changes, wet avalanches are more likely to be triggered.

During the daytime changes, wet avalanches are more likely to be triggered.

The avalanche danger increases considerably below 2500 m during the day changes. Wet loose snow avalanches and snow slabs are possible during the day in all aspects below around 2500 metres. The avalanches can occur spontaneously or be triggered by individuals. They usually remain medium-sized, but can also become large in a few places. Spontaneous sliding snow avalanche activity can also be expected on typical slopes. In a few places above 2200 m, weak layers in the persistent weak layer can also be disturbed, especially on west-, north- and east-facing slopes, and also south-facing slopes in the high Alps. The avalanche prone locations are difficult to recognise. Snow slabs in the persistent weak layer can reach medium size, but in isolated cases avalanches can also tear through to the floating snow close to the ground and become large.

The outgoing longwave radiation at night is good. A partially stable melt-freeze crust forms, which softens again during the day, especially on sunny slopes. Moisture is increasingly penetrating the snowpack; only in shady high and high alpine locations is there still dry snow on the surface. At medium altitudes, the snow is already soaked far down or down to the ground. On shady slopes from around 2200 m, there are angular forms and deep rime in the old snowpack, on the south side from around 2400 m. Fractures are most likely to occur on one of the uppermost crusts and only occasionally in the floating snow close to the ground. Some of the snow glides off the ground.

The night is starry. On Thursday, clouds will continue to gather from the north, but the sun will mostly shine and the peaks will remain clear. Brisk to strong winds from the north-west to north with peaks of up to 80 km/h will blow in the summit area. At 2000 metres it will be around 4 degrees in the afternoon, at 3000 metres around -4 degrees.

A disturbance zone will bring some precipitation (snowfall level at around 1800 metres) and wind on Friday. Fresh wind slab will develop at high altitudes. There will be little change to the danger scale.