Weisseck, Muhr Valley

Isolated glide-snow avalanches, small persistent weak layer

Isolated glide-snow avalanches, small persistent weak layer

Avalanche danger above 2500 m is LOW. Weak layers inside the old snowpack can on shady slopes above approximately 2500 m still can be easily triggered in very isolated cases, particularly on wind-protected slopes at the foot of rock walls or behind abrupt discontinuties in the terrain. Avalanches can attain medium size. From smooth slopes which have not yet discharged (grass-covered, rock plates) small glide-snow avalanches can release in isolated cases.

On north-facing (NW-N-NE) slopes above 2500 m the snowpack layering is unfavourable due to a sequence of melt-freeze crusts and faceted crystals in the fundament, or else depth hoar. This applies particularly to wind-protected slopes. Overall the snowpack has settled well and is quite compact. Melt-freeze crusts dominate. Snow depths are highly varied. Below 1800 m there is little snow on the ground.

Above the early-morning fogbanks, good visibility and sunshine on Wednesday until afternoon. In the afternoon, clouds will move in from the west, dampen the sun. Westerly winds will be light to moderate, sometimes brisk towards evening. At 2000 m: +1 degree; at 3000 m: -5 degrees. On Thursday, stormy westerly winds (reaching speeds of 80 km/hr), heavy clouds and reduced visibility. Intermittent rainfall. Snowfall level above 1800 m. At 2000 m: 0 degrees; at 3000 m; -6 degrees.

Only a few centimetres of fresh snow (5 cm at high altitudes) will generate at most shallow snowdrifts. Light rise in risks on Thursday due to freshly generated snowdrifts.