Persistent weak layers
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Persistent weak layer in transitions from shallow to deeper snow
Persistent weak layer in transitions from shallow to deeper snow
Above 2400 m, weak layers can be triggered. Danger zones occur esp. on shady slopes in transitions from shallow to deeper snow, usually needing large additional loading to trigger, the likelihood to trigger generally low, but large releases are possible. Below 2400 m glide snow activity can be expected due to rising temperatures. Glide-snow avalanches can reach medium size and release at any time of day, particularly on S/E facing slopes. Avoid zones below glide cracks. Near ridgelines, trigger-sensitive snowdrifts occur, esp. on N/E facing slopes, increasingly frequent with ascending altitude. The releases are generally small-sized.
The lowermost part of the snowpack has numerous melt-freeze crusts between which are faceted crystals, esp. on north-facing slopes and at high altitudes. The weak layers are most prevalent on shady slopes with shallow snow. The fresh snow from last weekend has bonded well with the old snowpack.
Friday will bring good weather. Above possible fogbanks, visibility is good, though the sunshine is somewhat dampened by clouds. As of midday, cloud cover will increase. Precipitation is not expected before evening. At 2000 m: +2 degrees; at 3000 m: -4 degrees. Mostly light winds.
Due to higher temperatures, wet-snow and glide-snow activity will increase on the weekend.
Bulletin data: Avalanche Warning Service Salzburg (CC BY 4.0)