Osterhorn Group,Gamsfeld Group

Latent persistent weak layer problem and rain

In the summit regions, and especially in blown-in and shady areas, there is well-settled new and wind slab snow from last week. The snow came to rest there on a thin melt-freeze crust from the weekend, in the vicinity of which faceted crystals can be found in the persistent weak layer. The snowpack is rapidly thinning out and is being soaked by rain.

The night will start clear, but as the day progresses, low and medium-high cloud fields will spread from the north-west. On Saturday, visibility will be restricted by mostly dense clouds. Rain at times. The wind will blow briskly (peaks up to 50 km/h) from westerly directions, but will ease noticeably during the daytime changes. At 2000 metres, the temperature will be -1 to 3 degrees.

In the night to Sunday it will clear up widely, the frost line will rise to around 2400 to 2600 metres. Note the daytime changes.

Latent persistent weak layer problem and rain

The avalanche risk is low. Where there is still a significant amount of snow, small avalanches can occasionally be triggered in persistent weak layers on shady slopes.

On typical slopes, sliding snow activity can set in and the snowpack is generally weakened by rain. Wet loose snow slides can occur in snow-rich locations.