2021-12-18T17:00:00+00:00 avalanche-warnings.eu 2021-12-18T23:00:00+00:00 2021-12-19T23:00:00+00:00 2 1 old snow shallow-snow steep north-facing slopes, esp.above 2200 m gliding snow very few, small-to-medium sized, very steep Generally favourable, caution urged in shallow-snow north-facing high alpine terrain Above 2200 m avalanche danger is moderate, below that altitude danger is generally low. Main problem: avalanche prone intermediate layers in the old snow near the ground. Isolated slab avalanches can trigger by large additional loading on shady high-altitude slopes, esp. where the snow is shallow (for example at entries to gullies and bowls). Triggered avalanches can grow to medium size. At intermediate altitudes, small glide-snow avalanches can still trigger naturally on smooth, steep grassy slopes. Mostly small sized. The snowpack is relatively favourably layers, with only a few small weak layers. Up to 2200 m there is a superficial melt-freeze crust. Inside the snowpack the layers are well bonded. Potential weak layer of faceted crystals and soft old snow is evident in some high-altitude terrain. Tendency towards fracture propagation is moderate. Gliding movements have diminished. On Sunday, brilliant sunshine above the persistent valley fog. Northerly winds at 20-40 km/hr at high altitude. At 2000 m: 0 degrees, at 3000 m: up to -4 degrees. On Monday temperatures will plummet, and northerly winds will be strong. The summits will disappear in fog, occasional snowfall, but minor amounts. At 2000 m: maximum -11 to -8 degrees, at 3000 m: maximum -11 degrees. Little change, despite a few centimetres of fresh snow and wind. 2021-12-18T17:00:00+00:00 avalanche-warnings.eu 2021-12-18T23:00:00+00:00 2021-12-19T23:00:00+00:00 1 old snow very few extremely steep slopes in extended northern aspects Favourable situation, hardly any danger zones Generally low danger, very few potential danger zones where large additional loading can trigger a slab, most likely on extremely steep slopes above 2100 m in E/N aspects. Shallow-snow and extremely steep slopes near ridgelines should be circumvented. The snowpack is relatively favourably layers, with only a few small weak layers. Up to 2200 m there is a superficial melt-freeze crust. Inside the snowpack the layers are well bonded. Potential weak layer of faceted crystals and soft old snow is evident in some high-altitude terrain, currently not easily triggered. Tendency towards fracture propagation is moderate. Gliding movements have diminished. On Sunday, brilliant sunshine above the persistent valley fog. Northerly winds at 20-40 km/hr at high altitude. At 1500 m: +3 degrees, at 2000 m: up to 0 degrees. On Monday temperatures will plummet, and northerly winds will be strong. The summits will disappear in fog, occasional snowfall, but minor amounts. At 2000 m: maximum -11 to -8 degrees, at 3000 m: maximum -11 degrees. No change. 2021-12-18T17:00:00+00:00 avalanche-warnings.eu 2021-12-18T23:00:00+00:00 2021-12-19T23:00:00+00:00 2 1 old snow gliding snow Persistent weak layer in shallow-snow high alpine terrain Above 2000 m avalanche danger is moderate, below that altitude danger is generally low. Main problem: avalanche prone intermediate layers in the old snow near the ground. Isolated slab avalanches can trigger by large additional loading on shady high-altitude slopes, esp. where the snow is shallow (for example at entries to gullies and bowls). Isolated slabs can be triggered in shady steep high-altitude terrain by large additional loading, e.g. at entries to gullies and bowls. Triggered avalanches can reach medium size. At intermediate altitudes, small glide-snow avalanches can still trigger naturally on smooth, steep grassy slopes. Glide-snow avalanches can reach medium-to-large size, particularly at altitudes of 1800-2300m. Up to 2500 m there is a superficial crust, above that there are wind crusts. Inside the snowpack there has been an improvement in bonding. Potential danger zones of faceted crystals and soft intermediate layers exist above 2000/2200, esp. where the snow is shallow and in exposed zones. On Sunday, brilliant sunshine above the persistent valley fog. On the Main Alpine Ridge and in the Lungau: N/NW winds at 60 km/hr at high altitude. At 2000 m: 0 degrees, at 3000 m: up to -4 degrees. On Monday temperatures will plummet, and northerly winds will be strong. The summits will disappear in fog, occasional snowfall, but minor amounts. At 2000 m: maximum -11 to -8 degrees, at 3000 m: maximum -11 degrees. Little change, despite a few centimetres of fresh snow and wind.