[ { "regions": [ { "regionID": "CH-1122" }, { "regionID": "CH-2112" }, { "regionID": "CH-2131" }, { "regionID": "CH-8113" }, { "regionID": "CH-8212" }, { "regionID": "CH-8114" }, { "regionID": "CH-8213" }, { "regionID": "CH-8224" }, { "regionID": "CH-8111" }, { "regionID": "CH-8221" }, { "regionID": "CH-8112" }, { "regionID": "CH-8211" }, { "regionID": "CH-8222" }, { "regionID": "CH-3221" }, { "regionID": "CH-1212" }, { "regionID": "CH-3211" }, { "regionID": "CH-8214" }, { "regionID": "CH-1211" }, { "regionID": "CH-8215" } ], "validTime": { "startTime": "2021-11-28T17:00:00+01:00", "endTime": "2021-11-29T17:00:00+01:00" }, "source": {}, "dangerRatings": [ { "elevation": {}, "customData": [], "mainValue": "low", "aspect": [] } ], "avalancheProblems": [], "tendency": { "validTime": {}, "tendencyComment": "On Tuesday skies will be heavily overcast for the most part, accompanied by additional snowfall on the northern flank of the Alps and in Grisons more than anywhere else. To begin with a strong to storm-strength northerly wind will be blowing. During the course of the day, winds will shift to southwesterly and the snowfall level in northern regions ascend to approximately 1000 m. South of the Main Alpine Ridge it will be predominantly sunny as a result of the northerly winds slackening off. On Wednesday morning in the northern regions it will be partly sunny, and quite sunny in the inneralpine regions and the south. During the course of the day, cloud cover will move in from the northwest and in the Jura region and the western sector of the northern flank of the Alps light precipitation is expected to set in. The snowfall level will lie at 1200 m. \n The danger of dry-snow avalanches could increase somewhat from region to region on Tuesday. Naturally triggered avalanches are possible. On Wednesday, avalanche danger levels will decrease somewhat." }, "publicationTime": "2021-11-28T17:00:00+01:00", "avalancheActivityHighlights": "At elevated altitudes a considerable avalanche danger will be encountered in some regions", "snowpackStructureComment": "Loosely-packed fresh snow is transported by intensifying northerly winds, generating new snowdrift accumulations \n Prior to the snowfall of last weekend there was only little snow on the ground in western and northern regions. In the Jura region and Prealps the snow fell predominantly on bare ground. At 2000 m altitude, most of the snow (30 to 50 cm) was in the Upper Valais sector of the Main Alpine Ridge, in northern Ticino and in central and southern Grisons. \n On shady slopes the thin old snowpack is expansively metamorphosed (faceted) to a great extent, thereby providing an unfavourable snow base. On sunny slopes a variety of crusts lies embedded inside the old snow cover, the snowpack surface is hardened to a large extent. Steep south-facing slopes were free of snow up to approximately 2200 m, in western and northern regions up to 2600 m.", "wxSynopsisComment": "On Saturday night there was snowfall registered over widespread areas which extended down to low lying areas, with the focal point in the central sector of the southern flank of the Alps, where 20 to 40 cm of fresh snow was registered, more than was expected. During the daytime on Sunday in the northern regions skies were heavily overcast for the most part, and intermittent snowfall was registered. In the Upper Valais and in Ticino it was partly sunny during the daytime. \nFresh snow: Between Saturday afternoon and Sunday afternoon in the eastern and southern parts of Ticino as well as in Moesano, 20 to 40 cm of fresh snow was registered; in the central and eastern sectors of the northern flank of the Alps and from the Rheintal region into the Upper Engadine, 15 to 30 cm of fresh snow was registered; elsewhere, less. \n Since the beginning of this period of precipitation on Thursday night, the following overall amounts of fresh fallen snow have been registered above approximately 1400 m: \n - Central sector of southern flank of the Alps, Main Alpine Ridge from San Bernardino Pass to the Ofen Pass and southwards therefrom: 30 to 40 cm, from place to place as much as 50 cm; \n - in the other regions of Switzerland 10 to 20 cm over widespread areas, in the Chablais and Trient region, as well as the Glarus Alps as much as 30 cm. \n \n \nTemperature: At midday at 2000 m, between -10 \u00b0C in the northern regions and -7 \u00b0C in the southern regions. \nWind: - Winds were blowing at light to moderate strength, at strong velocity in the Simplon region, then shifting from westerly to northwesterly directions; \n \n - in the Ticino, moderate northerly winds prevailed during the course of the day.\nSkies will be heavily overcast and snowfall is anticipated widespread down to low lying areas, most of which will fall on the northern flank of the Alps. South of the Main Alpine Ridge it will be quite sunny as a result of northerly winds. It will be somewhat colder. \nFresh snow: Between Sunday afternoon and Monday afternoon: - Western part of Lower Valais, northern flank of the Alps, Pr\u00e4ttigau: 15 to 30 cm; as much as 40 cm from the eastern Bernese Alps to the Glarus Alps; \n \n - in the other regions of Switzerland, 5 to 15 cm; south of the Main Alpine Ridge it is expected to remain dry. \n \n \n \nTemperature: At midday at 2000 m, between -11 \u00b0C in the northern regions and -8 \u00b0C in the southern regions. \nWind: Winds will be blowing at moderate strength, intermittently at strong velocity at high altitudes and in southern regions, from northerly directions.", "bulletinID": "8948709", "avalancheActivityComment": "Thus far only a little snow is lying. Adjacent to ridgelines small wind slabs formed. These are to be evaluated with care and prudence in particular in terrain where there is a danger of falling." }, { "regions": [ { "regionID": "CH-1221" }, { "regionID": "CH-3224" }, { "regionID": "CH-1121" }, { "regionID": "CH-1242" }, { "regionID": "CH-2111" }, { "regionID": "CH-2133" }, { "regionID": "CH-1241" }, { "regionID": "CH-2132" }, { "regionID": "CH-1228" }, { "regionID": "CH-1227" }, { "regionID": "CH-6112" }, { "regionID": "CH-1226" }, { "regionID": "CH-5121" }, { "regionID": "CH-6111" }, { "regionID": "CH-1225" }, { "regionID": "CH-4232" }, { "regionID": "CH-5124" }, { "regionID": "CH-1224" }, { "regionID": "CH-4211" }, { "regionID": "CH-1223" }, { "regionID": "CH-3222" }, { "regionID": "CH-1222" }, { "regionID": "CH-1244" }, { "regionID": "CH-3223" }, { "regionID": "CH-1111" }, { "regionID": "CH-1232" }, { "regionID": "CH-2123" }, { "regionID": "CH-1231" }, { "regionID": "CH-5215" }, { "regionID": "CH-2121" }, { "regionID": "CH-5212" }, { "regionID": "CH-1114" }, { "regionID": "CH-1213" }, { "regionID": "CH-1312" }, { "regionID": "CH-3111" }, { "regionID": "CH-1113" }, { "regionID": "CH-1234" }, { "regionID": "CH-1311" }, { "regionID": "CH-2224" }, { "regionID": "CH-1112" }, { "regionID": "CH-1233" }, { "regionID": "CH-2124" }, { "regionID": "CH-3113" }, { "regionID": "CH-3311" } ], "validTime": { "startTime": "2021-11-28T17:00:00+01:00", "endTime": "2021-11-29T17:00:00+01:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "1800" }, "customData": [], "mainValue": "moderate", "aspect": [ "N", "NE", "E", "SE", "W", "NW" ] } ], "avalancheProblems": [], "tendency": { "validTime": {}, "tendencyComment": "On Tuesday skies will be heavily overcast for the most part, accompanied by additional snowfall on the northern flank of the Alps and in Grisons more than anywhere else. To begin with a strong to storm-strength northerly wind will be blowing. During the course of the day, winds will shift to southwesterly and the snowfall level in northern regions ascend to approximately 1000 m. South of the Main Alpine Ridge it will be predominantly sunny as a result of the northerly winds slackening off. On Wednesday morning in the northern regions it will be partly sunny, and quite sunny in the inneralpine regions and the south. During the course of the day, cloud cover will move in from the northwest and in the Jura region and the western sector of the northern flank of the Alps light precipitation is expected to set in. The snowfall level will lie at 1200 m. \n The danger of dry-snow avalanches could increase somewhat from region to region on Tuesday. Naturally triggered avalanches are possible. On Wednesday, avalanche danger levels will decrease somewhat." }, "publicationTime": "2021-11-28T17:00:00+01:00", "avalancheActivityHighlights": "At elevated altitudes a considerable avalanche danger will be encountered in some regions", "snowpackStructureComment": "Loosely-packed fresh snow is transported by intensifying northerly winds, generating new snowdrift accumulations \n Prior to the snowfall of last weekend there was only little snow on the ground in western and northern regions. In the Jura region and Prealps the snow fell predominantly on bare ground. At 2000 m altitude, most of the snow (30 to 50 cm) was in the Upper Valais sector of the Main Alpine Ridge, in northern Ticino and in central and southern Grisons. \n On shady slopes the thin old snowpack is expansively metamorphosed (faceted) to a great extent, thereby providing an unfavourable snow base. On sunny slopes a variety of crusts lies embedded inside the old snow cover, the snowpack surface is hardened to a large extent. Steep south-facing slopes were free of snow up to approximately 2200 m, in western and northern regions up to 2600 m.", "wxSynopsisComment": "On Saturday night there was snowfall registered over widespread areas which extended down to low lying areas, with the focal point in the central sector of the southern flank of the Alps, where 20 to 40 cm of fresh snow was registered, more than was expected. During the daytime on Sunday in the northern regions skies were heavily overcast for the most part, and intermittent snowfall was registered. In the Upper Valais and in Ticino it was partly sunny during the daytime. \nFresh snow: Between Saturday afternoon and Sunday afternoon in the eastern and southern parts of Ticino as well as in Moesano, 20 to 40 cm of fresh snow was registered; in the central and eastern sectors of the northern flank of the Alps and from the Rheintal region into the Upper Engadine, 15 to 30 cm of fresh snow was registered; elsewhere, less. \n Since the beginning of this period of precipitation on Thursday night, the following overall amounts of fresh fallen snow have been registered above approximately 1400 m: \n - Central sector of southern flank of the Alps, Main Alpine Ridge from San Bernardino Pass to the Ofen Pass and southwards therefrom: 30 to 40 cm, from place to place as much as 50 cm; \n - in the other regions of Switzerland 10 to 20 cm over widespread areas, in the Chablais and Trient region, as well as the Glarus Alps as much as 30 cm. \n \n \nTemperature: At midday at 2000 m, between -10 \u00b0C in the northern regions and -7 \u00b0C in the southern regions. \nWind: - Winds were blowing at light to moderate strength, at strong velocity in the Simplon region, then shifting from westerly to northwesterly directions; \n \n - in the Ticino, moderate northerly winds prevailed during the course of the day.\nSkies will be heavily overcast and snowfall is anticipated widespread down to low lying areas, most of which will fall on the northern flank of the Alps. South of the Main Alpine Ridge it will be quite sunny as a result of northerly winds. It will be somewhat colder. \nFresh snow: Between Sunday afternoon and Monday afternoon: - Western part of Lower Valais, northern flank of the Alps, Pr\u00e4ttigau: 15 to 30 cm; as much as 40 cm from the eastern Bernese Alps to the Glarus Alps; \n \n - in the other regions of Switzerland, 5 to 15 cm; south of the Main Alpine Ridge it is expected to remain dry. \n \n \n \nTemperature: At midday at 2000 m, between -11 \u00b0C in the northern regions and -8 \u00b0C in the southern regions. \nWind: Winds will be blowing at moderate strength, intermittently at strong velocity at high altitudes and in southern regions, from northerly directions.", "bulletinID": "8948708", "avalancheActivityComment": "As a consequence of new snow and northerly wind, wind slabs will form. This also applies adjacent to ridgelines in all aspects. In some places new snow and wind slabs are lying on the soft surface of an old snowpack. Avalanches can in some cases be released easily, but they will be small in most cases. Apart from the danger of being buried, restraint should be exercised in particular in view of the danger of avalanches sweeping people along and giving rise to falls." }, { "regions": [ { "regionID": "CH-6121" }, { "regionID": "CH-6132" }, { "regionID": "CH-7112" }, { "regionID": "CH-7211" }, { "regionID": "CH-7222" }, { "regionID": "CH-6131" }, { "regionID": "CH-6211" }, { "regionID": "CH-6122" }, { "regionID": "CH-7111" }, { "regionID": "CH-7221" }, { "regionID": "CH-5223" }, { "regionID": "CH-6114" }, { "regionID": "CH-5233" }, { "regionID": "CH-6113" }, { "regionID": "CH-6212" }, { "regionID": "CH-6115" } ], "validTime": { "startTime": "2021-11-28T17:00:00+01:00", "endTime": "2021-11-29T17:00:00+01:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "2200" }, "customData": [], "mainValue": "considerable", "aspect": [ "N", "NE", "E", "SE", "S", "SW", "W", "NW" ] } ], "avalancheProblems": [], "tendency": { "validTime": {}, "tendencyComment": "On Tuesday skies will be heavily overcast for the most part, accompanied by additional snowfall on the northern flank of the Alps and in Grisons more than anywhere else. To begin with a strong to storm-strength northerly wind will be blowing. During the course of the day, winds will shift to southwesterly and the snowfall level in northern regions ascend to approximately 1000 m. South of the Main Alpine Ridge it will be predominantly sunny as a result of the northerly winds slackening off. On Wednesday morning in the northern regions it will be partly sunny, and quite sunny in the inneralpine regions and the south. During the course of the day, cloud cover will move in from the northwest and in the Jura region and the western sector of the northern flank of the Alps light precipitation is expected to set in. The snowfall level will lie at 1200 m. \n The danger of dry-snow avalanches could increase somewhat from region to region on Tuesday. Naturally triggered avalanches are possible. On Wednesday, avalanche danger levels will decrease somewhat." }, "publicationTime": "2021-11-28T17:00:00+01:00", "avalancheActivityHighlights": "At elevated altitudes a considerable avalanche danger will be encountered in some regions", "snowpackStructureComment": "Loosely-packed fresh snow is transported by intensifying northerly winds, generating new snowdrift accumulations \n Prior to the snowfall of last weekend there was only little snow on the ground in western and northern regions. In the Jura region and Prealps the snow fell predominantly on bare ground. At 2000 m altitude, most of the snow (30 to 50 cm) was in the Upper Valais sector of the Main Alpine Ridge, in northern Ticino and in central and southern Grisons. \n On shady slopes the thin old snowpack is expansively metamorphosed (faceted) to a great extent, thereby providing an unfavourable snow base. On sunny slopes a variety of crusts lies embedded inside the old snow cover, the snowpack surface is hardened to a large extent. Steep south-facing slopes were free of snow up to approximately 2200 m, in western and northern regions up to 2600 m.", "wxSynopsisComment": "On Saturday night there was snowfall registered over widespread areas which extended down to low lying areas, with the focal point in the central sector of the southern flank of the Alps, where 20 to 40 cm of fresh snow was registered, more than was expected. During the daytime on Sunday in the northern regions skies were heavily overcast for the most part, and intermittent snowfall was registered. In the Upper Valais and in Ticino it was partly sunny during the daytime. \nFresh snow: Between Saturday afternoon and Sunday afternoon in the eastern and southern parts of Ticino as well as in Moesano, 20 to 40 cm of fresh snow was registered; in the central and eastern sectors of the northern flank of the Alps and from the Rheintal region into the Upper Engadine, 15 to 30 cm of fresh snow was registered; elsewhere, less. \n Since the beginning of this period of precipitation on Thursday night, the following overall amounts of fresh fallen snow have been registered above approximately 1400 m: \n - Central sector of southern flank of the Alps, Main Alpine Ridge from San Bernardino Pass to the Ofen Pass and southwards therefrom: 30 to 40 cm, from place to place as much as 50 cm; \n - in the other regions of Switzerland 10 to 20 cm over widespread areas, in the Chablais and Trient region, as well as the Glarus Alps as much as 30 cm. \n \n \nTemperature: At midday at 2000 m, between -10 \u00b0C in the northern regions and -7 \u00b0C in the southern regions. \nWind: - Winds were blowing at light to moderate strength, at strong velocity in the Simplon region, then shifting from westerly to northwesterly directions; \n \n - in the Ticino, moderate northerly winds prevailed during the course of the day.\nSkies will be heavily overcast and snowfall is anticipated widespread down to low lying areas, most of which will fall on the northern flank of the Alps. South of the Main Alpine Ridge it will be quite sunny as a result of northerly winds. It will be somewhat colder. \nFresh snow: Between Sunday afternoon and Monday afternoon: - Western part of Lower Valais, northern flank of the Alps, Pr\u00e4ttigau: 15 to 30 cm; as much as 40 cm from the eastern Bernese Alps to the Glarus Alps; \n \n - in the other regions of Switzerland, 5 to 15 cm; south of the Main Alpine Ridge it is expected to remain dry. \n \n \n \nTemperature: At midday at 2000 m, between -11 \u00b0C in the northern regions and -8 \u00b0C in the southern regions. \nWind: Winds will be blowing at moderate strength, intermittently at strong velocity at high altitudes and in southern regions, from northerly directions.", "bulletinID": "8948710", "avalancheActivityComment": "As a consequence of a strong northerly wind, wind slabs will form over a wide area. New snow and wind slabs are lying on the soft surface of an old snowpack. This applies in particular on west, north and east facing slopes. Avalanches can in some cases be released easily and reach medium size. Backcountry touring calls for experience in the assessment of avalanche danger and careful route selection." }, { "regions": [ { "regionID": "CH-4115" }, { "regionID": "CH-4214" }, { "regionID": "CH-4116" }, { "regionID": "CH-4215" }, { "regionID": "CH-7123" }, { "regionID": "CH-7124" }, { "regionID": "CH-5122" }, { "regionID": "CH-5221" }, { "regionID": "CH-7121" }, { "regionID": "CH-4231" }, { "regionID": "CH-7122" }, { "regionID": "CH-4111" }, { "regionID": "CH-4112" }, { "regionID": "CH-5123" }, { "regionID": "CH-5222" }, { "regionID": "CH-4113" }, { "regionID": "CH-4212" }, { "regionID": "CH-7125" }, { "regionID": "CH-4114" }, { "regionID": "CH-7126" }, { "regionID": "CH-4225" }, { "regionID": "CH-5216" }, { "regionID": "CH-7113" }, { "regionID": "CH-4241" }, { "regionID": "CH-5111" }, { "regionID": "CH-5232" }, { "regionID": "CH-7231" }, { "regionID": "CH-4121" }, { "regionID": "CH-4242" }, { "regionID": "CH-5231" }, { "regionID": "CH-4122" }, { "regionID": "CH-4221" }, { "regionID": "CH-4243" }, { "regionID": "CH-5113" }, { "regionID": "CH-5234" }, { "regionID": "CH-4123" }, { "regionID": "CH-4222" }, { "regionID": "CH-4244" }, { "regionID": "CH-5112" }, { "regionID": "CH-4124" }, { "regionID": "CH-4223" }, { "regionID": "CH-5214" }, { "regionID": "CH-7114" }, { "regionID": "CH-4125" }, { "regionID": "CH-4224" }, { "regionID": "CH-7115" } ], "validTime": { "startTime": "2021-11-28T17:00:00+01:00", "endTime": "2021-11-29T17:00:00+01:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "2400" }, "customData": [], "mainValue": "moderate", "aspect": [ "N", "NE", "E", "SE", "W", "NW" ] } ], "avalancheProblems": [], "tendency": { "validTime": {}, "tendencyComment": "On Tuesday skies will be heavily overcast for the most part, accompanied by additional snowfall on the northern flank of the Alps and in Grisons more than anywhere else. To begin with a strong to storm-strength northerly wind will be blowing. During the course of the day, winds will shift to southwesterly and the snowfall level in northern regions ascend to approximately 1000 m. South of the Main Alpine Ridge it will be predominantly sunny as a result of the northerly winds slackening off. On Wednesday morning in the northern regions it will be partly sunny, and quite sunny in the inneralpine regions and the south. During the course of the day, cloud cover will move in from the northwest and in the Jura region and the western sector of the northern flank of the Alps light precipitation is expected to set in. The snowfall level will lie at 1200 m. \n The danger of dry-snow avalanches could increase somewhat from region to region on Tuesday. Naturally triggered avalanches are possible. On Wednesday, avalanche danger levels will decrease somewhat." }, "publicationTime": "2021-11-28T17:00:00+01:00", "avalancheActivityHighlights": "At elevated altitudes a considerable avalanche danger will be encountered in some regions", "snowpackStructureComment": "Loosely-packed fresh snow is transported by intensifying northerly winds, generating new snowdrift accumulations \n Prior to the snowfall of last weekend there was only little snow on the ground in western and northern regions. In the Jura region and Prealps the snow fell predominantly on bare ground. At 2000 m altitude, most of the snow (30 to 50 cm) was in the Upper Valais sector of the Main Alpine Ridge, in northern Ticino and in central and southern Grisons. \n On shady slopes the thin old snowpack is expansively metamorphosed (faceted) to a great extent, thereby providing an unfavourable snow base. On sunny slopes a variety of crusts lies embedded inside the old snow cover, the snowpack surface is hardened to a large extent. Steep south-facing slopes were free of snow up to approximately 2200 m, in western and northern regions up to 2600 m.", "wxSynopsisComment": "On Saturday night there was snowfall registered over widespread areas which extended down to low lying areas, with the focal point in the central sector of the southern flank of the Alps, where 20 to 40 cm of fresh snow was registered, more than was expected. During the daytime on Sunday in the northern regions skies were heavily overcast for the most part, and intermittent snowfall was registered. In the Upper Valais and in Ticino it was partly sunny during the daytime. \nFresh snow: Between Saturday afternoon and Sunday afternoon in the eastern and southern parts of Ticino as well as in Moesano, 20 to 40 cm of fresh snow was registered; in the central and eastern sectors of the northern flank of the Alps and from the Rheintal region into the Upper Engadine, 15 to 30 cm of fresh snow was registered; elsewhere, less. \n Since the beginning of this period of precipitation on Thursday night, the following overall amounts of fresh fallen snow have been registered above approximately 1400 m: \n - Central sector of southern flank of the Alps, Main Alpine Ridge from San Bernardino Pass to the Ofen Pass and southwards therefrom: 30 to 40 cm, from place to place as much as 50 cm; \n - in the other regions of Switzerland 10 to 20 cm over widespread areas, in the Chablais and Trient region, as well as the Glarus Alps as much as 30 cm. \n \n \nTemperature: At midday at 2000 m, between -10 \u00b0C in the northern regions and -7 \u00b0C in the southern regions. \nWind: - Winds were blowing at light to moderate strength, at strong velocity in the Simplon region, then shifting from westerly to northwesterly directions; \n \n - in the Ticino, moderate northerly winds prevailed during the course of the day.\nSkies will be heavily overcast and snowfall is anticipated widespread down to low lying areas, most of which will fall on the northern flank of the Alps. South of the Main Alpine Ridge it will be quite sunny as a result of northerly winds. It will be somewhat colder. \nFresh snow: Between Sunday afternoon and Monday afternoon: - Western part of Lower Valais, northern flank of the Alps, Pr\u00e4ttigau: 15 to 30 cm; as much as 40 cm from the eastern Bernese Alps to the Glarus Alps; \n \n - in the other regions of Switzerland, 5 to 15 cm; south of the Main Alpine Ridge it is expected to remain dry. \n \n \n \nTemperature: At midday at 2000 m, between -11 \u00b0C in the northern regions and -8 \u00b0C in the southern regions. \nWind: Winds will be blowing at moderate strength, intermittently at strong velocity at high altitudes and in southern regions, from northerly directions.", "bulletinID": "8948707", "avalancheActivityComment": "Adjacent to ridgelines and in pass areas as well as at elevated altitudes wind slabs will form. In some places new snow and wind slabs are lying on the soft surface of an old snowpack. Avalanches can in some cases be released easily, but they will be small in most cases. Apart from the danger of being buried, restraint should be exercised as well in view of the danger of avalanches sweeping people along and giving rise to falls." }, { "regions": [ { "regionID": "CH-1243" }, { "regionID": "CH-2134" }, { "regionID": "CH-2211" }, { "regionID": "CH-2222" }, { "regionID": "CH-3114" }, { "regionID": "CH-2122" }, { "regionID": "CH-2221" }, { "regionID": "CH-1247" }, { "regionID": "CH-1246" }, { "regionID": "CH-5211" }, { "regionID": "CH-1245" }, { "regionID": "CH-3112" }, { "regionID": "CH-2212" }, { "regionID": "CH-2223" }, { "regionID": "CH-4213" } ], "validTime": { "startTime": "2021-11-28T17:00:00+01:00", "endTime": "2021-11-29T17:00:00+01:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "2400" }, "customData": [], "mainValue": "considerable", "aspect": [ "N", "NE", "E", "SE", "W", "NW" ] } ], "avalancheProblems": [], "tendency": { "validTime": {}, "tendencyComment": "On Tuesday skies will be heavily overcast for the most part, accompanied by additional snowfall on the northern flank of the Alps and in Grisons more than anywhere else. To begin with a strong to storm-strength northerly wind will be blowing. During the course of the day, winds will shift to southwesterly and the snowfall level in northern regions ascend to approximately 1000 m. South of the Main Alpine Ridge it will be predominantly sunny as a result of the northerly winds slackening off. On Wednesday morning in the northern regions it will be partly sunny, and quite sunny in the inneralpine regions and the south. During the course of the day, cloud cover will move in from the northwest and in the Jura region and the western sector of the northern flank of the Alps light precipitation is expected to set in. The snowfall level will lie at 1200 m. \n The danger of dry-snow avalanches could increase somewhat from region to region on Tuesday. Naturally triggered avalanches are possible. On Wednesday, avalanche danger levels will decrease somewhat." }, "publicationTime": "2021-11-28T17:00:00+01:00", "avalancheActivityHighlights": "At elevated altitudes a considerable avalanche danger will be encountered in some regions", "snowpackStructureComment": "Loosely-packed fresh snow is transported by intensifying northerly winds, generating new snowdrift accumulations \n Prior to the snowfall of last weekend there was only little snow on the ground in western and northern regions. In the Jura region and Prealps the snow fell predominantly on bare ground. At 2000 m altitude, most of the snow (30 to 50 cm) was in the Upper Valais sector of the Main Alpine Ridge, in northern Ticino and in central and southern Grisons. \n On shady slopes the thin old snowpack is expansively metamorphosed (faceted) to a great extent, thereby providing an unfavourable snow base. On sunny slopes a variety of crusts lies embedded inside the old snow cover, the snowpack surface is hardened to a large extent. Steep south-facing slopes were free of snow up to approximately 2200 m, in western and northern regions up to 2600 m.", "wxSynopsisComment": "On Saturday night there was snowfall registered over widespread areas which extended down to low lying areas, with the focal point in the central sector of the southern flank of the Alps, where 20 to 40 cm of fresh snow was registered, more than was expected. During the daytime on Sunday in the northern regions skies were heavily overcast for the most part, and intermittent snowfall was registered. In the Upper Valais and in Ticino it was partly sunny during the daytime. \nFresh snow: Between Saturday afternoon and Sunday afternoon in the eastern and southern parts of Ticino as well as in Moesano, 20 to 40 cm of fresh snow was registered; in the central and eastern sectors of the northern flank of the Alps and from the Rheintal region into the Upper Engadine, 15 to 30 cm of fresh snow was registered; elsewhere, less. \n Since the beginning of this period of precipitation on Thursday night, the following overall amounts of fresh fallen snow have been registered above approximately 1400 m: \n - Central sector of southern flank of the Alps, Main Alpine Ridge from San Bernardino Pass to the Ofen Pass and southwards therefrom: 30 to 40 cm, from place to place as much as 50 cm; \n - in the other regions of Switzerland 10 to 20 cm over widespread areas, in the Chablais and Trient region, as well as the Glarus Alps as much as 30 cm. \n \n \nTemperature: At midday at 2000 m, between -10 \u00b0C in the northern regions and -7 \u00b0C in the southern regions. \nWind: - Winds were blowing at light to moderate strength, at strong velocity in the Simplon region, then shifting from westerly to northwesterly directions; \n \n - in the Ticino, moderate northerly winds prevailed during the course of the day.\nSkies will be heavily overcast and snowfall is anticipated widespread down to low lying areas, most of which will fall on the northern flank of the Alps. South of the Main Alpine Ridge it will be quite sunny as a result of northerly winds. It will be somewhat colder. \nFresh snow: Between Sunday afternoon and Monday afternoon: - Western part of Lower Valais, northern flank of the Alps, Pr\u00e4ttigau: 15 to 30 cm; as much as 40 cm from the eastern Bernese Alps to the Glarus Alps; \n \n - in the other regions of Switzerland, 5 to 15 cm; south of the Main Alpine Ridge it is expected to remain dry. \n \n \n \nTemperature: At midday at 2000 m, between -11 \u00b0C in the northern regions and -8 \u00b0C in the southern regions. \nWind: Winds will be blowing at moderate strength, intermittently at strong velocity at high altitudes and in southern regions, from northerly directions.", "bulletinID": "8948712", "avalancheActivityComment": "The new snow will be deposited on soft layers on west, north and east facing slopes. As a consequence of northerly wind, wind slabs will form at elevated altitudes. Avalanches can in some cases be released easily and reach medium size. Backcountry touring calls for experience in the assessment of avalanche danger and careful route selection." } ]