link Link to website https://avalanche.report/bulletin/2021-04-17 simple_link Link to the simplified website https://avalanche.report/simple/2021-04-17/en.html fd_albina_map.jpg Danger rating map (whole day) https://avalanche.report/albina_files/2021-04-17/2021-04-16_15-00-00/fd_albina_map.jpg fd_tyrol_map.jpg Danger rating map Tirol (whole day) https://avalanche.report/albina_files/2021-04-17/2021-04-16_15-00-00/fd_tyrol_map.jpg fd_southtyrol_map.jpg Danger rating map Southtyrol (whole day) https://avalanche.report/albina_files/2021-04-17/2021-04-16_15-00-00/fd_southtyrol_map.jpg fd_trentino_map.jpg Danger rating map Trentino (whole day) https://avalanche.report/albina_files/2021-04-17/2021-04-16_15-00-00/fd_trentino_map.jpg pdf PDF https://avalanche.report/albina_files/2021-04-17/2021-04-16_15-00-00/2021-04-17_en.pdf tyrol_pdf PDF Tirol https://avalanche.report/albina_files/2021-04-17/2021-04-16_15-00-00/2021-04-17_AT-07_en.pdf southtyrol_pdf PDF Southtyrol https://avalanche.report/albina_files/2021-04-17/2021-04-16_15-00-00/2021-04-17_IT-32-BZ_en.pdf trentino_pdf PDF Trentino https://avalanche.report/albina_files/2021-04-17/2021-04-16_15-00-00/2021-04-17_IT-32-TN_en.pdf fd_overlay.png Danger rating overlay (whole day) https://avalanche.report/albina_files/2021-04-17/2021-04-16_15-00-00/fd_overlay.png fd_regions.json GeoJSON for regions (whole day) https://avalanche.report/albina_files/2021-04-17/2021-04-16_15-00-00/fd_regions.json dangerRatingMap Simplified danger rating map of the region https://avalanche.report/albina_files/2021-04-17/2021-04-16_15-00-00/83ae2c91-ca86-4efa-a9bc-ab6c4eb5dea2.jpg website Link to region on the website https://avalanche.report/bulletin/2021-04-17?region=83ae2c91-ca86-4efa-a9bc-ab6c4eb5dea2 2021-04-16T15:00:00Z 2021-04-16T22:00:00Z 2021-04-17T22:00:00Z Avalanche.report https://avalanche.report Prealps Bondone and Stivo Vallarsa Folgaria - Laverone Southern Lagorai Ledro Valley Marzola - Valsugana Pine' - Mocheni Valley moderate treeline no_rating no_rating low treeline no_rating no_rating dp6 dp10 wind_drifted_snow N NW SE E NE treeline moderate moderate 2 2 2 steady 2021-04-17T22:00:00Z 2021-04-18T22:00:00Z Fresh and older wind slabs are to be assessed with care and prudence. Wind slabs are mostly rather small but to be assessed with care and prudence. These are covered with new snow in some cases and therefore difficult to recognise. The avalanche prone locations are to be found in particular adjacent to ridgelines and in gullies and bowls in all aspects. Slight increase in avalanche danger as a consequence of warming during the day and solar radiation. On very steep sunny slopes individual loose snow avalanches are to be expected from the late morning, but they will be mostly small. In addition a latent danger of gliding avalanches exists. The old snowpack will be generally well bonded. In some cases the wind slabs have bonded still only poorly with the old snowpack, especially on steep shady slopes above the tree line. Outgoing longwave radiation during the night will be quite good over a wide area. The solar radiation will give rise as the day progresses to slight moistening of the snowpack. Sunshine and high temperatures will give rise to gradual settling of the snowpack. dangerRatingMap Simplified danger rating map of the region https://avalanche.report/albina_files/2021-04-17/2021-04-16_15-00-00/734f41a5-c998-48b3-bbfc-a2466176ce77.jpg website Link to region on the website https://avalanche.report/bulletin/2021-04-17?region=734f41a5-c998-48b3-bbfc-a2466176ce77 2021-04-16T15:00:00Z 2021-04-16T22:00:00Z 2021-04-17T22:00:00Z Avalanche.report https://avalanche.report Latemar Southern Adamello Primiero - Pale di S. Martino Adamello - Presanella Northern Brenta - Peller Cembra Valley Western Nonsberg Alps Southern Brenta Fassa Valley Sole, Pejo and Rabbi Northern Lagorai Maddalene Paganella moderate 2200 no_rating no_rating low 2200 no_rating no_rating dp6 dp10 wind_drifted_snow N NW SE E NE 2200 moderate moderate 2 2 2 steady 2021-04-17T22:00:00Z 2021-04-18T22:00:00Z Fresh and older wind slabs are to be assessed with care and prudence. Wind slabs are sometimes quite large but can only be released by large loads in most cases. These are covered with new snow in some cases and therefore difficult to recognise. The avalanche prone locations are to be found in particular in northwest to north to southeast facing aspects, in particular adjacent to ridgelines and in gullies and bowls above the tree line. The number and size of avalanche prone locations will increase with altitude. Slight increase in avalanche danger as a consequence of warming during the day and solar radiation. On very steep sunny slopes individual loose snow avalanches are to be expected from the late morning, but they will be mostly small. In addition a latent danger of gliding avalanches exists. The old snowpack will be generally well bonded. In some cases the wind slabs have bonded still only poorly with the old snowpack, especially on steep shady slopes at high altitudes and in high Alpine regions. Faceted weak layers exist in the old snowpack on shady slopes. Outgoing longwave radiation during the night will be quite good over a wide area. The solar radiation will give rise as the day progresses to slight moistening of the snowpack. Sunshine and high temperatures will give rise to slight settling of the snowpack. dangerRatingMap Simplified danger rating map of the region https://avalanche.report/albina_files/2021-04-17/2021-04-16_15-00-00/4d8e99f3-c52d-48c3-ada4-4198e99f5b52.jpg website Link to region on the website https://avalanche.report/bulletin/2021-04-17?region=4d8e99f3-c52d-48c3-ada4-4198e99f5b52 2021-04-16T15:00:00Z 2021-04-16T22:00:00Z 2021-04-17T22:00:00Z Avalanche.report https://avalanche.report Sexten Dolomites Allgäu Alps Eastern Lechtal Alps - Ammergau Alps Mieming Mountains Karwendel Mountains Brandenberg Alps Wilder Kaiser Mountains - Waidring Alps Western Lechtal Alps Central Lechtal Alps Grieskogel Mountains 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 Kitzbühel Alps Western Pfunderer Mountains Eastern Kitzbühel Alps 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 Nonsberger Alps Eastern Rieserferner Mountains Northern Dolomites of Fiemme Glockner Range Gröden Dolomites Eastern Deferegger Alps Prags Dolomites Schober Mountains Lienzer Dolomites moderate 2200 no_rating no_rating low 2200 no_rating no_rating dp4 persistent_weak_layers W N SW NW SE E NE S 2200 moderate moderate 2 3 2 wind_drifted_snow N NW NE 2200 moderate moderate 2 3 2 steady 2021-04-17T22:00:00Z 2021-04-18T22:00:00Z Wind slabs and weakly bonded old snow are to be avoided. Avalanche prone weak layers exist in the top section of the snowpack in all aspects, in particular above approximately 2200 m. Avalanches can in isolated cases be released by small loads and reach medium size. Isolated whumpfing sounds can indicate the danger. Old wind slabs are sometimes quite large and can only be released in isolated cases. The avalanche prone locations are to be found in particular in northwest to north to northeast facing aspects above approximately 2200 m, also adjacent to ridgelines in all aspects at high altitudes and in high Alpine regions. Especially steep sunny slopes above approximately 2200 m: Towards its surface, the snowpack is unfavourably layered and its surface consists of loosely bonded snow lying on a crust. The snowpack will be prone to triggering in some places, in particular on wind-loaded slopes. The fresh snow of last week as well as the wind slabs are lying on soft layers in particular on shady slopes. The various wind slabs have bonded quite well already together. Outgoing longwave radiation during the night will be good over a wide area. The weather conditions as the day progresses will give rise to slight moistening of the snowpack. Hardly any decrease in danger of dry avalanches. This applies in particular at high altitudes and in high Alpine regions.