link Link to website https://avalanche.report/bulletin/2021-12-04 simple_link Link to the simplified website https://avalanche.report/simple/2021-12-04/en.html fd_albina_map.jpg Danger rating map (whole day) https://avalanche.report/albina_files/2021-12-04/2021-12-03_16-00-00/fd_albina_map.jpg fd_tyrol_map.jpg Danger rating map Tirol (whole day) https://avalanche.report/albina_files/2021-12-04/2021-12-03_16-00-00/fd_tyrol_map.jpg fd_southtyrol_map.jpg Danger rating map Southtyrol (whole day) https://avalanche.report/albina_files/2021-12-04/2021-12-03_16-00-00/fd_southtyrol_map.jpg fd_trentino_map.jpg Danger rating map Trentino (whole day) https://avalanche.report/albina_files/2021-12-04/2021-12-03_16-00-00/fd_trentino_map.jpg pdf PDF https://avalanche.report/albina_files/2021-12-04/2021-12-03_16-00-00/2021-12-04_en.pdf tyrol_pdf PDF Tirol https://avalanche.report/albina_files/2021-12-04/2021-12-03_16-00-00/2021-12-04_AT-07_en.pdf southtyrol_pdf PDF Southtyrol https://avalanche.report/albina_files/2021-12-04/2021-12-03_16-00-00/2021-12-04_IT-32-BZ_en.pdf trentino_pdf PDF Trentino https://avalanche.report/albina_files/2021-12-04/2021-12-03_16-00-00/2021-12-04_IT-32-TN_en.pdf fd_overlay.png Danger rating overlay (whole day) https://avalanche.report/albina_files/2021-12-04/2021-12-03_16-00-00/fd_overlay.png fd_regions.json GeoJSON for regions (whole day) https://avalanche.report/albina_files/2021-12-04/2021-12-03_16-00-00/fd_regions.json dangerRatingMap Simplified danger rating map of the region https://avalanche.report/albina_files/2021-12-04/2021-12-03_16-00-00/b60379e4-4b1a-424a-9d1a-606e976f91f8.jpg website Link to region on the website https://avalanche.report/bulletin/2021-12-04?region=b60379e4-4b1a-424a-9d1a-606e976f91f8 2021-12-03T16:00:00Z 2021-12-03T23:00:00Z 2021-12-04T23:00:00Z Avalanche.report https://avalanche.report Western Verwall Mountains Eastern Verwall Mountains Allgäu Alps Silvretta Samnaun Mountains Eastern Lechtal Alps - Ammergau Alps Northern Oetz and Stubai Alps Mieming Mountains Western Tuxer Alps Karwendel Mountains Eastern Tuxer Alps Western Lechtal Alps Central Lechtal Alps Grieskogel Mountains considerable treeline no_rating no_rating moderate treeline no_rating no_rating dp5 dp6 persistent_weak_layers NW NE W SE SW S N E treeline considerable considerable 3 4 2 gliding_snow W SE SW S E 2400 moderate moderate 1 2 wind_drifted_snow NW NE SE N E treeline considerable considerable 2 3 3 steady 2021-12-04T23:00:00Z 2021-12-05T23:00:00Z Weakly bonded old snow represents the main danger. Increase in danger of gliding avalanches and moist snow slides as the snowfall level rises. Gradual increase in avalanche danger as the snowfall level rises. <br/> Weak layers in the old snowpack can be released over a wide area even by individual winter sport participants, in particular on steep shady slopes above the tree line, as well as in all aspects at elevated altitudes. Whumpfing sounds and the formation of shooting cracks when stepping on the snowpack serve as an alarm indicating the danger. Remotely triggered avalanches are possible. Avalanches can reach dangerously large size. <br/> In addition the danger of gliding avalanches and moist snow slides will increase as the day progresses. In the regions exposed to rain this applies in particular. <br/> The fresh wind slabs are to be evaluated with care and prudence. These avalanche prone locations are to be found in particular adjacent to ridgelines and in gullies and bowls in northwest to north to southeast facing aspects. This applies above the tree line. The somewhat older wind slabs are covered with new snow and therefore difficult to recognise. <br/> Mostly the avalanches are medium-sized. Defensive route selection is important. 15 to 30 cm of snow will fall. In the south less snow will fall. <br/> Up to intermediate altitudes rain will fall. <br/> Faceted weak layers exist in the centre of the snowpack, in particular on shady slopes above the tree line, as well as on steep sunny slopes at elevated altitudes. Whumpfing sounds and the formation of shooting cracks when stepping on the snowpack confirm the existence of a weak snowack. <br/> The fresh wind slabs are lying on soft layers at high altitudes and in high Alpine regions. These will become increasingly prone to triggering at elevated altitudes. The avalanche danger will persist. As a consequence of falling temperatures a crust will form on the surface. This applies at low and intermediate altitudes. dangerRatingMap Simplified danger rating map of the region https://avalanche.report/albina_files/2021-12-04/2021-12-03_16-00-00/79f938f2-22b2-4d70-bc7f-a93e9b97120b.jpg website Link to region on the website https://avalanche.report/bulletin/2021-12-04?region=79f938f2-22b2-4d70-bc7f-a93e9b97120b 2021-12-03T16:00:00Z 2021-12-03T23:00:00Z 2021-12-04T23:00:00Z Avalanche.report https://avalanche.report Brandenberg Alps Western Kitzbühel Alps Wilder Kaiser Mountains - Waidring Alps Eastern Kitzbühel Alps moderate 2400 no_rating no_rating moderate 2400 no_rating no_rating dp2 dp6 gliding_snow W SE SW S E 2400 moderate moderate 1 2 wind_drifted_snow NW NE SE N E treeline moderate moderate 2 3 2 steady 2021-12-04T23:00:00Z 2021-12-05T23:00:00Z Increase in danger of gliding avalanches and moist snow slides as the snowfall level rises. Fresh wind slabs at elevated altitudes. Some mostly small gliding avalanches and moist snow slides are possible as the snowfall level rises. In the regions exposed to rain this applies in particular. <br/> In addition the fresh wind slabs in particular adjacent to ridgelines and in gullies and bowls and at elevated altitudes are easily triggered for a short time. The avalanche prone locations are barely recognisable because of the poor visibility. <br/> The avalanches are rather small. Experience in the assessment of avalanche danger is required. 15 to 30 cm of snow will fall. In the south less snow will fall. <br/> Up to intermediate altitudes rain will fall. <br/> The fresh wind slabs are lying on soft layers at high altitudes and in high Alpine regions. These will become increasingly prone to triggering at elevated altitudes. The avalanche danger will persist. As a consequence of falling temperatures a crust will form on the surface. This applies at low and intermediate altitudes. dangerRatingMap Simplified danger rating map of the region https://avalanche.report/albina_files/2021-12-04/2021-12-03_16-00-00/50955b88-ba4e-4f5e-8e02-c4c19f46e0ab.jpg website Link to region on the website https://avalanche.report/bulletin/2021-12-04?region=50955b88-ba4e-4f5e-8e02-c4c19f46e0ab 2021-12-03T16:00:00Z 2021-12-03T23:00:00Z 2021-12-04T23:00:00Z Avalanche.report https://avalanche.report Val Müstair Alps Langtaufers Schnals Ridge Southern Stubai Alps Southern Zillertal Alps and High Tauern Saldurn-Mastaun Ridge Texel Mountains 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 Ulten Valley Venediger Range Eastern Rieserferner Mountains Glockner Range Eastern Deferegger Alps Schober Mountains considerable treeline no_rating no_rating low treeline no_rating no_rating dp5 dp6 persistent_weak_layers NW NE W SE SW S N E treeline considerable considerable 2 4 2 wind_drifted_snow NW NE N E treeline moderate moderate 2 3 2 steady 2021-12-04T23:00:00Z 2021-12-05T23:00:00Z Weakly bonded old snow represents the main danger. Wind slabs require caution. Weak layers in the old snowpack can be released over a wide area even by individual winter sport participants, in particular on steep shady slopes above the tree line, as well as in all aspects at elevated altitudes. Whumpfing sounds and the formation of shooting cracks when stepping on the snowpack serve as an alarm indicating the danger. Caution is to be exercised at transitions from a shallow to a deep snowpack. Remotely triggered avalanches are possible. <br/> The fresh and older wind slabs can be released by a single winter sport participant in some cases especially on northwest to north to east facing aspects above the tree line. They are covered with new snow in some cases and therefore difficult to recognise. The prevalence of these avalanche prone locations will increase with altitude. <br/> Mostly the avalanches are medium-sized. Experience in the assessment of avalanche danger is required. In the north and in the northeast 5 to 20 cm of snow will fall. In the south less snow will fall. Faceted weak layers exist in the centre of the snowpack, in particular on shady slopes above the tree line, as well as on steep sunny slopes at elevated altitudes. Whumpfing sounds and the formation of shooting cracks when stepping on the snowpack confirm the existence of a weak snowack. <br/> The fresh wind slabs will become increasingly prone to triggering at elevated altitudes. As a consequence of the occasionally strong northerly wind, fresh snow drift accumulations will form. As a consequence of falling temperatures the snowpack can not consolidate. This applies in particular at elevated altitudes. dangerRatingMap Simplified danger rating map of the region https://avalanche.report/albina_files/2021-12-04/2021-12-03_16-00-00/fd73dd71-9684-40f8-af1a-bc8ff208df5f.jpg website Link to region on the website https://avalanche.report/bulletin/2021-12-04?region=fd73dd71-9684-40f8-af1a-bc8ff208df5f 2021-12-03T16:00:00.003944Z 2021-12-03T23:00:00Z 2021-12-04T23:00:00Z Avalanche.report https://avalanche.report Sexten Dolomites Latemar Southern Adamello Adamello - Presanella Northern Brenta - Peller Bondone and Stivo Folgaria - Laverone Southern Brenta Southern Lagorai Northern Lagorai Maddalene Pine' - Mocheni Valley Eastern Nonsberger Alps Northern Dolomites of Fiemme Gröden Dolomites Primiero - Pale di S. Martino Prags Dolomites Prealps Cembra Valley Lienzer Dolomites Vallarsa Western Nonsberg Alps Fassa Valley Sole, Pejo and Rabbi Ledro Valley Paganella Marzola - Valsugana moderate treeline no_rating no_rating low treeline no_rating no_rating dp6 dp5 wind_drifted_snow NW NE N E treeline moderate moderate 2 3 2 persistent_weak_layers NW NE W N E treeline moderate moderate 2 3 2 steady 2021-12-04T23:00:00Z 2021-12-05T23:00:00Z Wind slabs and weakly bonded old snow are to be assessed with care and prudence. The fresh and older wind slabs are in some cases still prone to triggering in particular on northwest to north to east facing aspects above the tree line. They are covered with new snow and therefore difficult to recognise. <br/> Weak layers in the old snowpack can still be released in some places by individual winter sport participants. Such avalanche prone locations are to be found in particular on shady slopes above the tree line. At elevated altitudes the avalanche prone locations are to be found in all aspects. Whumpfing sounds and the formation of shooting cracks when stepping on the snowpack serve as an alarm indicating the danger. Mostly avalanches are rather small. <br/> Experience in the assessment of avalanche danger is required. Some snow will fall in some regions. <br/> In some cases the various wind slabs have bonded poorly with each other and the old snowpack. <br/> Faceted weak layers exist in the centre of the snowpack, in particular on shady slopes above the tree line, as well as in all aspects at elevated altitudes. Whumpfing sounds and the formation of shooting cracks when stepping on the snowpack indicate the existence of a weak snowack. As a consequence of the occasionally strong northerly wind, fresh snow drift accumulations will form. As a consequence of falling temperatures the snowpack can not consolidate. This applies in particular at elevated altitudes.