link Link to website https://avalanche.report/bulletin/2021-12-21 simple_link Link to the simplified website https://avalanche.report/simple/2021-12-21/en.html fd_albina_map.jpg Danger rating map (whole day) https://avalanche.report/albina_files/2021-12-21/2021-12-20_16-00-00/fd_albina_map.jpg fd_tyrol_map.jpg Danger rating map Tirol (whole day) https://avalanche.report/albina_files/2021-12-21/2021-12-20_16-00-00/fd_tyrol_map.jpg fd_southtyrol_map.jpg Danger rating map Southtyrol (whole day) https://avalanche.report/albina_files/2021-12-21/2021-12-20_16-00-00/fd_southtyrol_map.jpg fd_trentino_map.jpg Danger rating map Trentino (whole day) https://avalanche.report/albina_files/2021-12-21/2021-12-20_16-00-00/fd_trentino_map.jpg pdf PDF https://avalanche.report/albina_files/2021-12-21/2021-12-20_16-00-00/2021-12-21_en.pdf tyrol_pdf PDF Tirol https://avalanche.report/albina_files/2021-12-21/2021-12-20_16-00-00/2021-12-21_AT-07_en.pdf southtyrol_pdf PDF Southtyrol https://avalanche.report/albina_files/2021-12-21/2021-12-20_16-00-00/2021-12-21_IT-32-BZ_en.pdf trentino_pdf PDF Trentino https://avalanche.report/albina_files/2021-12-21/2021-12-20_16-00-00/2021-12-21_IT-32-TN_en.pdf fd_overlay.png Danger rating overlay (whole day) https://avalanche.report/albina_files/2021-12-21/2021-12-20_16-00-00/fd_overlay.png fd_regions.json GeoJSON for regions (whole day) https://avalanche.report/albina_files/2021-12-21/2021-12-20_16-00-00/fd_regions.json dangerRatingMap Simplified danger rating map of the region https://avalanche.report/albina_files/2021-12-21/2021-12-20_16-00-00/5d534ee8-a164-4c67-87ed-c411b13f7eee.jpg website Link to region on the website https://avalanche.report/bulletin/2021-12-21?region=5d534ee8-a164-4c67-87ed-c411b13f7eee 2021-12-20T16:00:00Z 2021-12-20T23:00:00Z 2021-12-21T23:00:00Z Avalanche.report https://avalanche.report Sexten Dolomites Val Müstair Alps Western Verwall Mountains Langtaufers Eastern Verwall Mountains Schnals Ridge Silvretta Southern Stubai Alps Samnaun Mountains Southern Zillertal Alps and High Tauern Northern Oetz and Stubai Alps Saldurn-Mastaun Ridge Western Tuxer Alps Texel Mountains Eastern Tuxer Alps Sarntal Alps Western Pfunderer Mountains Glockturm Range Eastern Pfunderer Mountains Durreck Range Weißkugel Range Western Rieserferner Mountains Gurgler Range Western Deferegger Alps Central Stubai Alps Ortler Range Northern Zillertal Alps Allgäu Alps Ulten Valley Venediger Range Eastern Lechtal Alps - Ammergau Alps Eastern Nonsberger Alps Mieming Mountains Eastern Rieserferner Mountains Northern Dolomites of Fiemme Karwendel Mountains Glockner Range Gröden Dolomites Eastern Deferegger Alps Prags Dolomites Schober Mountains Lienzer Dolomites Western Lechtal Alps Central Lechtal Alps Grieskogel Mountains moderate 2200 no_rating no_rating low 2200 no_rating no_rating dp6 dp7 wind_drifted_snow NE NW W N E 2200 moderate moderate 2 3 2 persistent_weak_layers NE NW W N E 2200 moderate moderate 3 3 1 steady 2021-12-21T23:00:00Z 2021-12-22T23:00:00Z Fresh wind slabs above approximately 2200 m. Weakly bonded old snow is to be evaluated with care and prudence. As a consequence of a moderate to strong wind from northerly directions, sometimes avalanche prone wind slabs formed in the last few days above approximately 2200 m. These are mostly easy to recognise and can be released in isolated cases at their margins. In particular transitions from a shallow to a deep snowpack are unfavourable. Avalanche prone locations are to be found in particular in gullies and bowls, and behind abrupt changes in the terrain and in shady places that are protected from the wind. Avalanches can additionally in very isolated cases be released in the weakly bonded old snow by a single winter sport participant, in particular on very steep shady slopes above approximately 2200 m, as well as on steep sunny slopes in high Alpine regions. In very isolated cases avalanches can also reach large size. Isolated whumpfing sounds can indicate the danger. In particular areas where the snow cover is rather shallow are unfavourable. Very steep, little used shady slopes are to be evaluated with care and prudence. Faceted weak layers exist in the centre of the snowpack, in particular on shady slopes above the tree line, as well as on sunny slopes in high Alpine regions. In areas where the snow cover is rather shallow the likelihood of avalanches is higher. Snow profiles and stability tests confirm that the stability of the snowpack varies greatly within a small area in these altitude zones. In the vicinity of peaks the wind was moderate to strong for a temporary period. The fresh wind slabs are poorly bonded with the old snowpack in particular on steep shady slopes. As a consequence of rising temperatures a crust formed on the surface during the last few days, especially on steep sunny slopes below approximately 2600 m. Snow depths vary greatly above the tree line, depending on the infuence of the wind. On steep sunny slopes less snow than usual is lying. Below the tree line, shady places that are protected from the wind: The snowpack is faceted; its surface is loosely bonded and consists of surface hoar. A quite favourable avalanche situation will be encountered in some regions. On shady slopes the situation is a little more dangerous. dangerRatingMap Simplified danger rating map of the region https://avalanche.report/albina_files/2021-12-21/2021-12-20_16-00-00/c5a9f1cd-9234-40dd-9e4c-938cd23ee71a.jpg website Link to region on the website https://avalanche.report/bulletin/2021-12-21?region=c5a9f1cd-9234-40dd-9e4c-938cd23ee71a 2021-12-20T16:00:00.007806Z 2021-12-20T23:00:00Z 2021-12-21T23:00:00Z Avalanche.report https://avalanche.report Latemar Southern Adamello Primiero - Pale di S. Martino Adamello - Presanella Prealps Northern Brenta - Peller Cembra Valley Bondone and Stivo Vallarsa Western Nonsberg Alps Folgaria - Laverone Southern Brenta Fassa Valley Sole, Pejo and Rabbi Southern Lagorai Ledro Valley Northern Lagorai Maddalene Paganella Marzola - Valsugana Pine' - Mocheni Valley moderate 2200 no_rating no_rating low 2200 no_rating no_rating dp6 dp7 wind_drifted_snow SE NE NW W N E S SW 2200 moderate moderate 2 3 2 persistent_weak_layers NE NW W N E 2200 moderate moderate 3 3 1 steady 2021-12-21T23:00:00Z 2021-12-22T23:00:00Z Fresh wind slabs above approximately 2200 m. As a consequence of a moderate to strong wind from northerly directions, sometimes avalanche prone wind slabs formed in the last few days above approximately 2200 m. These are mostly easy to recognise and can be released in isolated cases at their margins. In particular transitions from a shallow to a deep snowpack are unfavourable. Avalanche prone locations are to be found in particular in gullies and bowls, and behind abrupt changes in the terrain and in shady places that are protected from the wind. Avalanches can additionally in very isolated cases be released in the old snowpack by small loads, in particular on very steep slopes. In very isolated cases avalanches can also reach large size. Isolated whumpfing sounds can indicate the danger. Very steep, little used shady slopes are to be evaluated with care and prudence. Faceted weak layers exist in the centre of the snowpack, in particular on shady slopes above the tree line, as well as on sunny slopes in high Alpine regions. In areas where the snow cover is rather shallow the likelihood of avalanches is higher. In the vicinity of peaks the wind was moderate to strong at times. The fresh wind slabs are poorly bonded with the old snowpack in particular on steep shady slopes. As a consequence of rising temperatures a crust formed on the surface during the last few days, especially on steep sunny slopes below approximately 2600 m. Snow depths vary greatly above the tree line, depending on the infuence of the wind. On steep sunny slopes less snow than usual is lying. Below the tree line, shady places that are protected from the wind: The snowpack is faceted; its surface is loosely bonded and consists of surface hoar. As a consequence of sharply falling temperatures the snowpack can not consolidate during the next two days. dangerRatingMap Simplified danger rating map of the region https://avalanche.report/albina_files/2021-12-21/2021-12-20_16-00-00/fe8aad10-3b50-4152-8c8f-ebac59ff877c.jpg website Link to region on the website https://avalanche.report/bulletin/2021-12-21?region=fe8aad10-3b50-4152-8c8f-ebac59ff877c 2021-12-20T16:00:00Z 2021-12-20T23:00:00Z 2021-12-21T23:00:00Z Avalanche.report https://avalanche.report Brandenberg Alps Western Kitzbühel Alps Wilder Kaiser Mountains - Waidring Alps Eastern Kitzbühel Alps moderate treeline no_rating no_rating low treeline no_rating no_rating dp6 dp7 wind_drifted_snow NE NW W N E treeline moderate moderate 2 3 2 steady 2021-12-21T23:00:00Z 2021-12-22T23:00:00Z Wind slabs are to be avoided. The fresh wind slabs are in some cases prone to triggering. They are mostly rather small but can be released easily, in particular in areas where the snow cover is rather shallow. Avalanches can be triggered in the various wind slab layers and reach medium size. Caution is to be exercised on steep shady slopes above the tree line, as well as in all aspects at elevated altitudes. Very steep, little used slopes are to be traversed by snow sport participants one at a time. Careful route selection is recommended. The wind was moderate to strong for a temporary period. The fresh and older wind slabs are in some cases still prone to triggering. They are poorly bonded with the old snowpack in particular on shady slopes. Faceted weak layers exist in the centre of the snowpack, in particular on shady slopes above the tree line, as well as on sunny slopes at intermediate and high altitudes. As a consequence of mild temperatures a crust formed on the surface during the last few days. This applies in particular on steep shady slopes, as well as in all aspects at low and intermediate altitudes. Below the tree line, shady places that are protected from the wind: The snowpack is faceted; its surface is loosely bonded and consists of surface hoar. Hardly any decrease in avalanche danger. On shady slopes the situation is less favourable.