link Link to website https://avalanche.report/bulletin/2021-12-20 simple_link Link to the simplified website https://avalanche.report/simple/2021-12-20/en.html fd_albina_map.jpg Danger rating map (whole day) https://avalanche.report/albina_files/2021-12-20/2021-12-19_16-00-00/fd_albina_map.jpg fd_tyrol_map.jpg Danger rating map Tirol (whole day) https://avalanche.report/albina_files/2021-12-20/2021-12-19_16-00-00/fd_tyrol_map.jpg fd_southtyrol_map.jpg Danger rating map Southtyrol (whole day) https://avalanche.report/albina_files/2021-12-20/2021-12-19_16-00-00/fd_southtyrol_map.jpg fd_trentino_map.jpg Danger rating map Trentino (whole day) https://avalanche.report/albina_files/2021-12-20/2021-12-19_16-00-00/fd_trentino_map.jpg pdf PDF https://avalanche.report/albina_files/2021-12-20/2021-12-19_16-00-00/2021-12-20_en.pdf tyrol_pdf PDF Tirol https://avalanche.report/albina_files/2021-12-20/2021-12-19_16-00-00/2021-12-20_AT-07_en.pdf southtyrol_pdf PDF Southtyrol https://avalanche.report/albina_files/2021-12-20/2021-12-19_16-00-00/2021-12-20_IT-32-BZ_en.pdf trentino_pdf PDF Trentino https://avalanche.report/albina_files/2021-12-20/2021-12-19_16-00-00/2021-12-20_IT-32-TN_en.pdf fd_overlay.png Danger rating overlay (whole day) https://avalanche.report/albina_files/2021-12-20/2021-12-19_16-00-00/fd_overlay.png fd_regions.json GeoJSON for regions (whole day) https://avalanche.report/albina_files/2021-12-20/2021-12-19_16-00-00/fd_regions.json dangerRatingMap Simplified danger rating map of the region https://avalanche.report/albina_files/2021-12-20/2021-12-19_16-00-00/49c5f156-061e-4b6c-b13a-1d4886329355.jpg website Link to region on the website https://avalanche.report/bulletin/2021-12-20?region=49c5f156-061e-4b6c-b13a-1d4886329355 2021-12-19T16:00:00.003810Z 2021-12-19T23:00:00Z 2021-12-20T23:00:00Z 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 Folgaria - Laverone Western Nonsberg Alps Southern Brenta Fassa Valley Southern Lagorai Sole, Pejo and Rabbi Northern Lagorai Ledro Valley Maddalene Paganella Pine' - Mocheni Valley Marzola - Valsugana moderate 2200 no_rating no_rating low 2200 no_rating no_rating dp7 dp6 persistent_weak_layers NE E NW W N 2200 moderate moderate 2 3 2 wind_drifted_snow NE E NW W N 2200 moderate moderate 2 3 2 steady 2021-12-20T23:00:00Z 2021-12-21T23:00:00Z Weakly bonded old snow is to be evaluated with care and prudence. Fresh wind slabs are to be avoided. Avalanches can in some places be released in the weakly bonded old snow by a single winter sport participant, in particular on steep shady slopes at high altitudes and in high Alpine regions, as well as on steep sunny slopes in high Alpine regions. Mostly avalanches are medium-sized. Whumpfing sounds and the formation of shooting cracks when stepping on the snowpack indicate this situation. The number and size of avalanche prone locations will increase with altitude. The fresh wind slabs are in some cases prone to triggering. Caution is to be exercised on steep shady slopes at high altitudes and in high Alpine regions. On very steep sunny slopes gliding avalanches and moist snow slides are possible as the day progresses. Careful route selection is recommended. Steep slopes are to be traversed by snow sport participants one at a time. 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 elevated altitudes. Field observations and snow profiles confirm this situation. The wind slabs are in some cases still prone to triggering. They are poorly bonded with the old snowpack in particular on shady slopes. As a consequence of mild temperatures and solar radiation the snowpack will consolidate. Sunshine and high temperatures will give rise as the day progresses to slight moistening of the snowpack. As a consequence of rising temperatures a crust formed on the surface during the last few days. Weakly bonded old snow requires caution. Fresh wind slabs require caution. dangerRatingMap Simplified danger rating map of the region https://avalanche.report/albina_files/2021-12-20/2021-12-19_16-00-00/20e3a801-44da-4f8d-81cc-6d8b8bcee8f0.jpg website Link to region on the website https://avalanche.report/bulletin/2021-12-20?region=20e3a801-44da-4f8d-81cc-6d8b8bcee8f0 2021-12-19T16:00:00Z 2021-12-19T23:00:00Z 2021-12-20T23:00:00Z 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 dp7 dp6 persistent_weak_layers NE E NW W N 2200 moderate moderate 3 3 1 wind_drifted_snow NE E NW W N 2200 moderate moderate 2 3 2 steady 2021-12-20T23:00:00Z 2021-12-21T23:00:00Z Weakly bonded old snow is to be avoided. Fresh wind slabs require caution. Weak layers in the old snowpack can still be released in very isolated cases by individual winter sport participants, 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. The number and size of avalanche prone locations will increase with altitude. In particular areas where the snow cover is rather shallow are unfavourable. Very steep shady slopes are to be traversed by snow sport participants one at a time. In addition the fresh and older wind slabs should be taken into account. As a consequence of the sometimes strong wind the wind slabs will increase in size moderately as the day progresses. These are easy to recognise and can be released easily especially 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 above approximately 2200 m. 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 the unfavourable bonding of the snowpack in these altitude zones. In addition the fresh wind slabs are prone to triggering in some locations. In the vicinity of peaks the wind will be moderate to strong for a temporary period. The wind slabs are poorly bonded with the old snowpack in particular on 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 a little snow is lying. Hardly any decrease in avalanche danger. On shady slopes the situation is less favourable. dangerRatingMap Simplified danger rating map of the region https://avalanche.report/albina_files/2021-12-20/2021-12-19_16-00-00/c4cfc3c5-a1d5-4eee-ab98-cef0f209cb8d.jpg website Link to region on the website https://avalanche.report/bulletin/2021-12-20?region=c4cfc3c5-a1d5-4eee-ab98-cef0f209cb8d 2021-12-19T16:00:00Z 2021-12-19T23:00:00Z 2021-12-20T23:00:00Z 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 E NW W N treeline moderate moderate 2 3 2 steady 2021-12-20T23:00:00Z 2021-12-21T23:00:00Z Wind slabs are to be avoided. The fresh and older wind slabs are in individual cases still prone to triggering. They are mostly rather small but can be released easily, in particular in areas where the snow cover is rather shallow. Caution is to be exercised on steep shady slopes above the tree line, as well as in all aspects at elevated altitudes. Avalanches can in very isolated cases be released in the weakly bonded old snow. Isolated whumpfing sounds indicate this situation. Very steep, little used slopes are to be traversed by snow sport participants one at a time. Careful route selection is recommended. Some snow will fall. The wind will be 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. Hardly any decrease in avalanche danger. On shady slopes the situation is less favourable.