[ { "regions": [ { "regionID": "CH-1121" }, { "regionID": "CH-3111" }, { "regionID": "CH-2121" }, { "regionID": "CH-2133" }, { "regionID": "CH-2132" }, { "regionID": "CH-1311" }, { "regionID": "CH-1111" }, { "regionID": "CH-2111" }, { "regionID": "CH-1112" }, { "regionID": "CH-2124" }, { "regionID": "CH-1213" }, { "regionID": "CH-1113" }, { "regionID": "CH-1221" } ], "validTime": { "startTime": "2021-05-08T17:00:00+02:00", "endTime": "2021-05-09T12:00:00+02:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "2000" }, "customData": [], "mainValue": "moderate", "aspect": [ "N", "NE", "E", "W", "NW" ] } ], "avalancheProblems": [], "tendency": { "validTime": {}, "tendencyComment": "In the southern regions skies will be heavily overcast. On Monday, precipitation is anticipated, to start with in the Valais sector of the Main Alpine Ridge and in western Ticino. On Tuesday, snowfall is expected which will be intensive on the Main Alpine Ridge and southwards therefrom. The snowfall level on Monday will still lie at 2600 m, subsequently it will descend to 2000 m by Tuesday evening. In the northern regions, foehn-induced bright intervals are expected on Monday. On Tuesday, snowfall is expected, including in the northern regions above approximately 2000 m. \n On Monday, a storm-strength southerly wind will be blowing in all regions of Switzerland. On Monday night, the wind will incrementally slacken off, to start with in the western regions, subsequently also in the eastern regions. \n In the southern regions the danger of dry-snow avalanches will increase significantly at elevated altitudes. On Tuesday it is currently assumed that Danger Level 4 (High) will be reached. Above approximately 2500 m, naturally triggered dry-snow avalanches can be expected as a result of the fresh snow and strong-to-storm strength winds; and wet-snow avalanches below 2500 m, as a result of the intensive rainfall. In the northern regions, the avalanche danger levels are not expected to change significantly on Monday; on Tuesday danger levels will increase as a result of the fresh snow." }, "publicationTime": "2021-05-08T17:00:00+02:00", "avalancheActivityHighlights": "Considerable danger of dry and wet avalanches will be encountered in some regions", "snowpackStructureComment": "The great amounts of fresh snow which fell in the northern and western regions on Friday have by and large stabilised. The layers of fresh snow and freshly generated snowdrifts are still prone to triggering on high-altitude, steep north-facing slopes more than anywhere else. There, as the consequence of strong-velocity southerly winds, additional snowdrift accumulations are still being generated. In the south and in Grisons the snowdrift accumulations are relatively small. \n Beneath the fresh snow and snowdrifts of this week, the old snow is thoroughly wet below approximately 3000 m on east-facing, south-facing and west-facing slopes, and below 2200 to 2500 m on north-facing slopes. As a result of higher daytime temperatures, the stabilising crusts on the snowpack surface as well as inside the snow cover tend to soften up. During the course of the day, naturally triggered wet-snow avalanches can be expected. These releases can sweep along the entire snow cover with them, particularly on north-facing slopes below approximately 2500 m.", "wxSynopsisComment": "Following a night of clear skies it was predominantly sunny. During the course of the day it became significantly warmer. \nFresh snow: - \nTemperature: At midday at 2000 m, between +5 \u00b0C in the western regions, +1 \u00b0C in the eastern regions and +3 \u00b0C in the southern regions. Temperatures tended to rise further during the afternoon. \nWind: Winds were blowing at light-to-moderate strength from southerly to southwesterly directions.\nFollowing a night of predominantly clear skies it will be sunny to start with. During the course of the day, clouds will move in, initially in southern regions, during the afternoon also in western regions. \nFresh snow: - \nTemperature: At midday at 2000 m, between +12 \u00b0C in the northern regions and +8 \u00b0C in the southern regions. Zero-degree level at 3800 m. \nWind: - Winds in early morning will still be blowing at moderate strength, intensifying to strong-to-storm strength during the course of the day, from southwesterly directions; \n - in the Alpine valleys of the north, a strong foehn wind will prevail.", "bulletinID": "89485888948592", "avalancheActivityComment": "As a consequence of a gathering strong southerly wind, avalanche prone wind slabs will form in the course of the day. They are clearly recognisable to the trained eye. The wind slabs are to be evaluated with care and prudence in steep terrain. Avalanches can in some cases reach medium size." }, { "regions": [ { "regionID": "CH-1121" }, { "regionID": "CH-3111" }, { "regionID": "CH-2121" }, { "regionID": "CH-2133" }, { "regionID": "CH-2132" }, { "regionID": "CH-1311" }, { "regionID": "CH-1111" }, { "regionID": "CH-2111" }, { "regionID": "CH-1112" }, { "regionID": "CH-2124" }, { "regionID": "CH-1213" }, { "regionID": "CH-1113" }, { "regionID": "CH-1221" } ], "validTime": { "startTime": "2021-05-09T12:00:00+02:00", "endTime": "2021-05-09T17:00:00+02:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "2000" }, "customData": [], "mainValue": "moderate", "aspect": [ "N", "NE", "E", "W", "NW" ] } ], "avalancheProblems": [], "tendency": { "validTime": {}, "tendencyComment": "In the southern regions skies will be heavily overcast. On Monday, precipitation is anticipated, to start with in the Valais sector of the Main Alpine Ridge and in western Ticino. On Tuesday, snowfall is expected which will be intensive on the Main Alpine Ridge and southwards therefrom. The snowfall level on Monday will still lie at 2600 m, subsequently it will descend to 2000 m by Tuesday evening. In the northern regions, foehn-induced bright intervals are expected on Monday. On Tuesday, snowfall is expected, including in the northern regions above approximately 2000 m. \n On Monday, a storm-strength southerly wind will be blowing in all regions of Switzerland. On Monday night, the wind will incrementally slacken off, to start with in the western regions, subsequently also in the eastern regions. \n In the southern regions the danger of dry-snow avalanches will increase significantly at elevated altitudes. On Tuesday it is currently assumed that Danger Level 4 (High) will be reached. Above approximately 2500 m, naturally triggered dry-snow avalanches can be expected as a result of the fresh snow and strong-to-storm strength winds; and wet-snow avalanches below 2500 m, as a result of the intensive rainfall. In the northern regions, the avalanche danger levels are not expected to change significantly on Monday; on Tuesday danger levels will increase as a result of the fresh snow." }, "publicationTime": "2021-05-08T17:00:00+02:00", "avalancheActivityHighlights": "Considerable danger of dry and wet avalanches will be encountered in some regions", "snowpackStructureComment": "The great amounts of fresh snow which fell in the northern and western regions on Friday have by and large stabilised. The layers of fresh snow and freshly generated snowdrifts are still prone to triggering on high-altitude, steep north-facing slopes more than anywhere else. There, as the consequence of strong-velocity southerly winds, additional snowdrift accumulations are still being generated. In the south and in Grisons the snowdrift accumulations are relatively small. \n Beneath the fresh snow and snowdrifts of this week, the old snow is thoroughly wet below approximately 3000 m on east-facing, south-facing and west-facing slopes, and below 2200 to 2500 m on north-facing slopes. As a result of higher daytime temperatures, the stabilising crusts on the snowpack surface as well as inside the snow cover tend to soften up. During the course of the day, naturally triggered wet-snow avalanches can be expected. These releases can sweep along the entire snow cover with them, particularly on north-facing slopes below approximately 2500 m.", "wxSynopsisComment": "Following a night of clear skies it was predominantly sunny. During the course of the day it became significantly warmer. \nFresh snow: - \nTemperature: At midday at 2000 m, between +5 \u00b0C in the western regions, +1 \u00b0C in the eastern regions and +3 \u00b0C in the southern regions. Temperatures tended to rise further during the afternoon. \nWind: Winds were blowing at light-to-moderate strength from southerly to southwesterly directions.\nFollowing a night of predominantly clear skies it will be sunny to start with. During the course of the day, clouds will move in, initially in southern regions, during the afternoon also in western regions. \nFresh snow: - \nTemperature: At midday at 2000 m, between +12 \u00b0C in the northern regions and +8 \u00b0C in the southern regions. Zero-degree level at 3800 m. \nWind: - Winds in early morning will still be blowing at moderate strength, intensifying to strong-to-storm strength during the course of the day, from southwesterly directions; \n - in the Alpine valleys of the north, a strong foehn wind will prevail.", "bulletinID": "89485888948592_pm", "predecessor_id": "89485888948592", "avalancheActivityComment": "As a consequence of a gathering strong southerly wind, avalanche prone wind slabs will form in the course of the day. They are clearly recognisable to the trained eye. The wind slabs are to be evaluated with care and prudence in steep terrain. Avalanches can in some cases reach medium size.\nIn all aspects wet and gliding avalanches are possible as a consequence of warming during the day and solar radiation. These can reach medium size." }, { "regions": [ { "regionID": "CH-1242" }, { "regionID": "CH-1241" } ], "validTime": { "startTime": "2021-05-08T17:00:00+02:00", "endTime": "2021-05-09T12:00:00+02:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "2000" }, "customData": [], "mainValue": "moderate", "aspect": [ "N", "NE", "E", "W", "NW" ] } ], "avalancheProblems": [], "tendency": { "validTime": {}, "tendencyComment": "In the southern regions skies will be heavily overcast. On Monday, precipitation is anticipated, to start with in the Valais sector of the Main Alpine Ridge and in western Ticino. On Tuesday, snowfall is expected which will be intensive on the Main Alpine Ridge and southwards therefrom. The snowfall level on Monday will still lie at 2600 m, subsequently it will descend to 2000 m by Tuesday evening. In the northern regions, foehn-induced bright intervals are expected on Monday. On Tuesday, snowfall is expected, including in the northern regions above approximately 2000 m. \n On Monday, a storm-strength southerly wind will be blowing in all regions of Switzerland. On Monday night, the wind will incrementally slacken off, to start with in the western regions, subsequently also in the eastern regions. \n In the southern regions the danger of dry-snow avalanches will increase significantly at elevated altitudes. On Tuesday it is currently assumed that Danger Level 4 (High) will be reached. Above approximately 2500 m, naturally triggered dry-snow avalanches can be expected as a result of the fresh snow and strong-to-storm strength winds; and wet-snow avalanches below 2500 m, as a result of the intensive rainfall. In the northern regions, the avalanche danger levels are not expected to change significantly on Monday; on Tuesday danger levels will increase as a result of the fresh snow." }, "publicationTime": "2021-05-08T17:00:00+02:00", "avalancheActivityHighlights": "Considerable danger of dry and wet avalanches will be encountered in some regions", "snowpackStructureComment": "The great amounts of fresh snow which fell in the northern and western regions on Friday have by and large stabilised. The layers of fresh snow and freshly generated snowdrifts are still prone to triggering on high-altitude, steep north-facing slopes more than anywhere else. There, as the consequence of strong-velocity southerly winds, additional snowdrift accumulations are still being generated. In the south and in Grisons the snowdrift accumulations are relatively small. \n Beneath the fresh snow and snowdrifts of this week, the old snow is thoroughly wet below approximately 3000 m on east-facing, south-facing and west-facing slopes, and below 2200 to 2500 m on north-facing slopes. As a result of higher daytime temperatures, the stabilising crusts on the snowpack surface as well as inside the snow cover tend to soften up. During the course of the day, naturally triggered wet-snow avalanches can be expected. These releases can sweep along the entire snow cover with them, particularly on north-facing slopes below approximately 2500 m.", "wxSynopsisComment": "Following a night of clear skies it was predominantly sunny. During the course of the day it became significantly warmer. \nFresh snow: - \nTemperature: At midday at 2000 m, between +5 \u00b0C in the western regions, +1 \u00b0C in the eastern regions and +3 \u00b0C in the southern regions. Temperatures tended to rise further during the afternoon. \nWind: Winds were blowing at light-to-moderate strength from southerly to southwesterly directions.\nFollowing a night of predominantly clear skies it will be sunny to start with. During the course of the day, clouds will move in, initially in southern regions, during the afternoon also in western regions. \nFresh snow: - \nTemperature: At midday at 2000 m, between +12 \u00b0C in the northern regions and +8 \u00b0C in the southern regions. Zero-degree level at 3800 m. \nWind: - Winds in early morning will still be blowing at moderate strength, intensifying to strong-to-storm strength during the course of the day, from southwesterly directions; \n - in the Alpine valleys of the north, a strong foehn wind will prevail.", "bulletinID": "89485888948590", "avalancheActivityComment": "As a consequence of a gathering strong southerly wind, avalanche prone wind slabs will form in the course of the day. They are clearly recognisable to the trained eye. The wind slabs are to be evaluated with care and prudence in steep terrain. Avalanches can in some cases reach medium size." }, { "regions": [ { "regionID": "CH-1242" }, { "regionID": "CH-1241" } ], "validTime": { "startTime": "2021-05-09T12:00:00+02:00", "endTime": "2021-05-09T17:00:00+02:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "2000" }, "customData": [], "mainValue": "considerable", "aspect": [ "N", "NE", "E", "W", "NW" ] } ], "avalancheProblems": [], "tendency": { "validTime": {}, "tendencyComment": "In the southern regions skies will be heavily overcast. On Monday, precipitation is anticipated, to start with in the Valais sector of the Main Alpine Ridge and in western Ticino. On Tuesday, snowfall is expected which will be intensive on the Main Alpine Ridge and southwards therefrom. The snowfall level on Monday will still lie at 2600 m, subsequently it will descend to 2000 m by Tuesday evening. In the northern regions, foehn-induced bright intervals are expected on Monday. On Tuesday, snowfall is expected, including in the northern regions above approximately 2000 m. \n On Monday, a storm-strength southerly wind will be blowing in all regions of Switzerland. On Monday night, the wind will incrementally slacken off, to start with in the western regions, subsequently also in the eastern regions. \n In the southern regions the danger of dry-snow avalanches will increase significantly at elevated altitudes. On Tuesday it is currently assumed that Danger Level 4 (High) will be reached. Above approximately 2500 m, naturally triggered dry-snow avalanches can be expected as a result of the fresh snow and strong-to-storm strength winds; and wet-snow avalanches below 2500 m, as a result of the intensive rainfall. In the northern regions, the avalanche danger levels are not expected to change significantly on Monday; on Tuesday danger levels will increase as a result of the fresh snow." }, "publicationTime": "2021-05-08T17:00:00+02:00", "avalancheActivityHighlights": "Considerable danger of dry and wet avalanches will be encountered in some regions", "snowpackStructureComment": "The great amounts of fresh snow which fell in the northern and western regions on Friday have by and large stabilised. The layers of fresh snow and freshly generated snowdrifts are still prone to triggering on high-altitude, steep north-facing slopes more than anywhere else. There, as the consequence of strong-velocity southerly winds, additional snowdrift accumulations are still being generated. In the south and in Grisons the snowdrift accumulations are relatively small. \n Beneath the fresh snow and snowdrifts of this week, the old snow is thoroughly wet below approximately 3000 m on east-facing, south-facing and west-facing slopes, and below 2200 to 2500 m on north-facing slopes. As a result of higher daytime temperatures, the stabilising crusts on the snowpack surface as well as inside the snow cover tend to soften up. During the course of the day, naturally triggered wet-snow avalanches can be expected. These releases can sweep along the entire snow cover with them, particularly on north-facing slopes below approximately 2500 m.", "wxSynopsisComment": "Following a night of clear skies it was predominantly sunny. During the course of the day it became significantly warmer. \nFresh snow: - \nTemperature: At midday at 2000 m, between +5 \u00b0C in the western regions, +1 \u00b0C in the eastern regions and +3 \u00b0C in the southern regions. Temperatures tended to rise further during the afternoon. \nWind: Winds were blowing at light-to-moderate strength from southerly to southwesterly directions.\nFollowing a night of predominantly clear skies it will be sunny to start with. During the course of the day, clouds will move in, initially in southern regions, during the afternoon also in western regions. \nFresh snow: - \nTemperature: At midday at 2000 m, between +12 \u00b0C in the northern regions and +8 \u00b0C in the southern regions. Zero-degree level at 3800 m. \nWind: - Winds in early morning will still be blowing at moderate strength, intensifying to strong-to-storm strength during the course of the day, from southwesterly directions; \n - in the Alpine valleys of the north, a strong foehn wind will prevail.", "bulletinID": "89485888948590_pm", "predecessor_id": "89485888948590", "avalancheActivityComment": "As a consequence of a gathering strong southerly wind, avalanche prone wind slabs will form in the course of the day. They are clearly recognisable to the trained eye. The wind slabs are to be evaluated with care and prudence in steep terrain. Avalanches can in some cases reach medium size.\nThe danger of wet avalanches will increase significantly during the day. As a consequence of warming during the day and solar radiation wet avalanches are to be expected, even large ones in isolated cases. This applies on east, south and west facing slopes in all altitude zones, as well as on north facing slopes below approximately 2800 m. Backcountry tours should be started very early and concluded timely." }, { "regions": [ { "regionID": "CH-6115" }, { "regionID": "CH-6122" }, { "regionID": "CH-6212" }, { "regionID": "CH-6121" } ], "validTime": { "startTime": "2021-05-08T17:00:00+02:00", "endTime": "2021-05-09T12:00:00+02:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "2400" }, "customData": [], "mainValue": "moderate", "aspect": [ "N", "NE", "E", "W", "NW" ] } ], "avalancheProblems": [], "tendency": { "validTime": {}, "tendencyComment": "In the southern regions skies will be heavily overcast. On Monday, precipitation is anticipated, to start with in the Valais sector of the Main Alpine Ridge and in western Ticino. On Tuesday, snowfall is expected which will be intensive on the Main Alpine Ridge and southwards therefrom. The snowfall level on Monday will still lie at 2600 m, subsequently it will descend to 2000 m by Tuesday evening. In the northern regions, foehn-induced bright intervals are expected on Monday. On Tuesday, snowfall is expected, including in the northern regions above approximately 2000 m. \n On Monday, a storm-strength southerly wind will be blowing in all regions of Switzerland. On Monday night, the wind will incrementally slacken off, to start with in the western regions, subsequently also in the eastern regions. \n In the southern regions the danger of dry-snow avalanches will increase significantly at elevated altitudes. On Tuesday it is currently assumed that Danger Level 4 (High) will be reached. Above approximately 2500 m, naturally triggered dry-snow avalanches can be expected as a result of the fresh snow and strong-to-storm strength winds; and wet-snow avalanches below 2500 m, as a result of the intensive rainfall. In the northern regions, the avalanche danger levels are not expected to change significantly on Monday; on Tuesday danger levels will increase as a result of the fresh snow." }, "publicationTime": "2021-05-08T17:00:00+02:00", "avalancheActivityHighlights": "Considerable danger of dry and wet avalanches will be encountered in some regions", "snowpackStructureComment": "The great amounts of fresh snow which fell in the northern and western regions on Friday have by and large stabilised. The layers of fresh snow and freshly generated snowdrifts are still prone to triggering on high-altitude, steep north-facing slopes more than anywhere else. There, as the consequence of strong-velocity southerly winds, additional snowdrift accumulations are still being generated. In the south and in Grisons the snowdrift accumulations are relatively small. \n Beneath the fresh snow and snowdrifts of this week, the old snow is thoroughly wet below approximately 3000 m on east-facing, south-facing and west-facing slopes, and below 2200 to 2500 m on north-facing slopes. As a result of higher daytime temperatures, the stabilising crusts on the snowpack surface as well as inside the snow cover tend to soften up. During the course of the day, naturally triggered wet-snow avalanches can be expected. These releases can sweep along the entire snow cover with them, particularly on north-facing slopes below approximately 2500 m.", "wxSynopsisComment": "Following a night of clear skies it was predominantly sunny. During the course of the day it became significantly warmer. \nFresh snow: - \nTemperature: At midday at 2000 m, between +5 \u00b0C in the western regions, +1 \u00b0C in the eastern regions and +3 \u00b0C in the southern regions. Temperatures tended to rise further during the afternoon. \nWind: Winds were blowing at light-to-moderate strength from southerly to southwesterly directions.\nFollowing a night of predominantly clear skies it will be sunny to start with. During the course of the day, clouds will move in, initially in southern regions, during the afternoon also in western regions. \nFresh snow: - \nTemperature: At midday at 2000 m, between +12 \u00b0C in the northern regions and +8 \u00b0C in the southern regions. Zero-degree level at 3800 m. \nWind: - Winds in early morning will still be blowing at moderate strength, intensifying to strong-to-storm strength during the course of the day, from southwesterly directions; \n - in the Alpine valleys of the north, a strong foehn wind will prevail.", "bulletinID": "89485848948592", "avalancheActivityComment": "As a consequence of a gathering strong southerly wind, avalanche prone wind slabs will form in the course of the day at elevated altitudes. Fresh and older wind slabs are to be evaluated with care and prudence in steep terrain. They are clearly recognisable to the trained eye. In high Alpine regions the avalanche prone locations are more prevalent and the danger is greater. \n Careful route selection is recommended." }, { "regions": [ { "regionID": "CH-6115" }, { "regionID": "CH-6122" }, { "regionID": "CH-6212" }, { "regionID": "CH-6121" } ], "validTime": { "startTime": "2021-05-09T12:00:00+02:00", "endTime": "2021-05-09T17:00:00+02:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "2400" }, "customData": [], "mainValue": "moderate", "aspect": [ "N", "NE", "E", "W", "NW" ] } ], "avalancheProblems": [], "tendency": { "validTime": {}, "tendencyComment": "In the southern regions skies will be heavily overcast. On Monday, precipitation is anticipated, to start with in the Valais sector of the Main Alpine Ridge and in western Ticino. On Tuesday, snowfall is expected which will be intensive on the Main Alpine Ridge and southwards therefrom. The snowfall level on Monday will still lie at 2600 m, subsequently it will descend to 2000 m by Tuesday evening. In the northern regions, foehn-induced bright intervals are expected on Monday. On Tuesday, snowfall is expected, including in the northern regions above approximately 2000 m. \n On Monday, a storm-strength southerly wind will be blowing in all regions of Switzerland. On Monday night, the wind will incrementally slacken off, to start with in the western regions, subsequently also in the eastern regions. \n In the southern regions the danger of dry-snow avalanches will increase significantly at elevated altitudes. On Tuesday it is currently assumed that Danger Level 4 (High) will be reached. Above approximately 2500 m, naturally triggered dry-snow avalanches can be expected as a result of the fresh snow and strong-to-storm strength winds; and wet-snow avalanches below 2500 m, as a result of the intensive rainfall. In the northern regions, the avalanche danger levels are not expected to change significantly on Monday; on Tuesday danger levels will increase as a result of the fresh snow." }, "publicationTime": "2021-05-08T17:00:00+02:00", "avalancheActivityHighlights": "Considerable danger of dry and wet avalanches will be encountered in some regions", "snowpackStructureComment": "The great amounts of fresh snow which fell in the northern and western regions on Friday have by and large stabilised. The layers of fresh snow and freshly generated snowdrifts are still prone to triggering on high-altitude, steep north-facing slopes more than anywhere else. There, as the consequence of strong-velocity southerly winds, additional snowdrift accumulations are still being generated. In the south and in Grisons the snowdrift accumulations are relatively small. \n Beneath the fresh snow and snowdrifts of this week, the old snow is thoroughly wet below approximately 3000 m on east-facing, south-facing and west-facing slopes, and below 2200 to 2500 m on north-facing slopes. As a result of higher daytime temperatures, the stabilising crusts on the snowpack surface as well as inside the snow cover tend to soften up. During the course of the day, naturally triggered wet-snow avalanches can be expected. These releases can sweep along the entire snow cover with them, particularly on north-facing slopes below approximately 2500 m.", "wxSynopsisComment": "Following a night of clear skies it was predominantly sunny. During the course of the day it became significantly warmer. \nFresh snow: - \nTemperature: At midday at 2000 m, between +5 \u00b0C in the western regions, +1 \u00b0C in the eastern regions and +3 \u00b0C in the southern regions. Temperatures tended to rise further during the afternoon. \nWind: Winds were blowing at light-to-moderate strength from southerly to southwesterly directions.\nFollowing a night of predominantly clear skies it will be sunny to start with. During the course of the day, clouds will move in, initially in southern regions, during the afternoon also in western regions. \nFresh snow: - \nTemperature: At midday at 2000 m, between +12 \u00b0C in the northern regions and +8 \u00b0C in the southern regions. Zero-degree level at 3800 m. \nWind: - Winds in early morning will still be blowing at moderate strength, intensifying to strong-to-storm strength during the course of the day, from southwesterly directions; \n - in the Alpine valleys of the north, a strong foehn wind will prevail.", "bulletinID": "89485848948592_pm", "predecessor_id": "89485848948592", "avalancheActivityComment": "As a consequence of a gathering strong southerly wind, avalanche prone wind slabs will form in the course of the day at elevated altitudes. Fresh and older wind slabs are to be evaluated with care and prudence in steep terrain. They are clearly recognisable to the trained eye. In high Alpine regions the avalanche prone locations are more prevalent and the danger is greater. \n Careful route selection is recommended.\nIn all aspects wet and gliding avalanches are possible as a consequence of warming during the day and solar radiation. These can reach medium size." }, { "regions": [ { "regionID": "CH-2112" }, { "regionID": "CH-6131" }, { "regionID": "CH-1211" }, { "regionID": "CH-2131" }, { "regionID": "CH-6132" }, { "regionID": "CH-1212" }, { "regionID": "CH-3221" }, { "regionID": "CH-3211" }, { "regionID": "CH-1122" } ], "validTime": { "startTime": "2021-05-08T17:00:00+02:00", "endTime": "2021-05-09T12:00:00+02:00" }, "source": {}, "dangerRatings": [ { "elevation": {}, "customData": [], "mainValue": "low", "aspect": [] } ], "avalancheProblems": [], "tendency": { "validTime": {}, "tendencyComment": "In the southern regions skies will be heavily overcast. On Monday, precipitation is anticipated, to start with in the Valais sector of the Main Alpine Ridge and in western Ticino. On Tuesday, snowfall is expected which will be intensive on the Main Alpine Ridge and southwards therefrom. The snowfall level on Monday will still lie at 2600 m, subsequently it will descend to 2000 m by Tuesday evening. In the northern regions, foehn-induced bright intervals are expected on Monday. On Tuesday, snowfall is expected, including in the northern regions above approximately 2000 m. \n On Monday, a storm-strength southerly wind will be blowing in all regions of Switzerland. On Monday night, the wind will incrementally slacken off, to start with in the western regions, subsequently also in the eastern regions. \n In the southern regions the danger of dry-snow avalanches will increase significantly at elevated altitudes. On Tuesday it is currently assumed that Danger Level 4 (High) will be reached. Above approximately 2500 m, naturally triggered dry-snow avalanches can be expected as a result of the fresh snow and strong-to-storm strength winds; and wet-snow avalanches below 2500 m, as a result of the intensive rainfall. In the northern regions, the avalanche danger levels are not expected to change significantly on Monday; on Tuesday danger levels will increase as a result of the fresh snow." }, "publicationTime": "2021-05-08T17:00:00+02:00", "avalancheActivityHighlights": "Considerable danger of dry and wet avalanches will be encountered in some regions", "snowpackStructureComment": "The great amounts of fresh snow which fell in the northern and western regions on Friday have by and large stabilised. The layers of fresh snow and freshly generated snowdrifts are still prone to triggering on high-altitude, steep north-facing slopes more than anywhere else. There, as the consequence of strong-velocity southerly winds, additional snowdrift accumulations are still being generated. In the south and in Grisons the snowdrift accumulations are relatively small. \n Beneath the fresh snow and snowdrifts of this week, the old snow is thoroughly wet below approximately 3000 m on east-facing, south-facing and west-facing slopes, and below 2200 to 2500 m on north-facing slopes. As a result of higher daytime temperatures, the stabilising crusts on the snowpack surface as well as inside the snow cover tend to soften up. During the course of the day, naturally triggered wet-snow avalanches can be expected. These releases can sweep along the entire snow cover with them, particularly on north-facing slopes below approximately 2500 m.", "wxSynopsisComment": "Following a night of clear skies it was predominantly sunny. During the course of the day it became significantly warmer. \nFresh snow: - \nTemperature: At midday at 2000 m, between +5 \u00b0C in the western regions, +1 \u00b0C in the eastern regions and +3 \u00b0C in the southern regions. Temperatures tended to rise further during the afternoon. \nWind: Winds were blowing at light-to-moderate strength from southerly to southwesterly directions.\nFollowing a night of predominantly clear skies it will be sunny to start with. During the course of the day, clouds will move in, initially in southern regions, during the afternoon also in western regions. \nFresh snow: - \nTemperature: At midday at 2000 m, between +12 \u00b0C in the northern regions and +8 \u00b0C in the southern regions. Zero-degree level at 3800 m. \nWind: - Winds in early morning will still be blowing at moderate strength, intensifying to strong-to-storm strength during the course of the day, from southwesterly directions; \n - in the Alpine valleys of the north, a strong foehn wind will prevail.", "bulletinID": "89485858948591", "avalancheActivityComment": "Only a little snow is lying. Dry avalanches are no longer to be expected." }, { "regions": [ { "regionID": "CH-2112" }, { "regionID": "CH-6131" }, { "regionID": "CH-1211" }, { "regionID": "CH-2131" }, { "regionID": "CH-6132" }, { "regionID": "CH-1212" }, { "regionID": "CH-3221" }, { "regionID": "CH-3211" }, { "regionID": "CH-1122" } ], "validTime": { "startTime": "2021-05-09T12:00:00+02:00", "endTime": "2021-05-09T17:00:00+02:00" }, "source": {}, "dangerRatings": [ { "elevation": {}, "customData": [], "mainValue": "low", "aspect": [] } ], "avalancheProblems": [], "tendency": { "validTime": {}, "tendencyComment": "In the southern regions skies will be heavily overcast. On Monday, precipitation is anticipated, to start with in the Valais sector of the Main Alpine Ridge and in western Ticino. On Tuesday, snowfall is expected which will be intensive on the Main Alpine Ridge and southwards therefrom. The snowfall level on Monday will still lie at 2600 m, subsequently it will descend to 2000 m by Tuesday evening. In the northern regions, foehn-induced bright intervals are expected on Monday. On Tuesday, snowfall is expected, including in the northern regions above approximately 2000 m. \n On Monday, a storm-strength southerly wind will be blowing in all regions of Switzerland. On Monday night, the wind will incrementally slacken off, to start with in the western regions, subsequently also in the eastern regions. \n In the southern regions the danger of dry-snow avalanches will increase significantly at elevated altitudes. On Tuesday it is currently assumed that Danger Level 4 (High) will be reached. Above approximately 2500 m, naturally triggered dry-snow avalanches can be expected as a result of the fresh snow and strong-to-storm strength winds; and wet-snow avalanches below 2500 m, as a result of the intensive rainfall. In the northern regions, the avalanche danger levels are not expected to change significantly on Monday; on Tuesday danger levels will increase as a result of the fresh snow." }, "publicationTime": "2021-05-08T17:00:00+02:00", "avalancheActivityHighlights": "Considerable danger of dry and wet avalanches will be encountered in some regions", "snowpackStructureComment": "The great amounts of fresh snow which fell in the northern and western regions on Friday have by and large stabilised. The layers of fresh snow and freshly generated snowdrifts are still prone to triggering on high-altitude, steep north-facing slopes more than anywhere else. There, as the consequence of strong-velocity southerly winds, additional snowdrift accumulations are still being generated. In the south and in Grisons the snowdrift accumulations are relatively small. \n Beneath the fresh snow and snowdrifts of this week, the old snow is thoroughly wet below approximately 3000 m on east-facing, south-facing and west-facing slopes, and below 2200 to 2500 m on north-facing slopes. As a result of higher daytime temperatures, the stabilising crusts on the snowpack surface as well as inside the snow cover tend to soften up. During the course of the day, naturally triggered wet-snow avalanches can be expected. These releases can sweep along the entire snow cover with them, particularly on north-facing slopes below approximately 2500 m.", "wxSynopsisComment": "Following a night of clear skies it was predominantly sunny. During the course of the day it became significantly warmer. \nFresh snow: - \nTemperature: At midday at 2000 m, between +5 \u00b0C in the western regions, +1 \u00b0C in the eastern regions and +3 \u00b0C in the southern regions. Temperatures tended to rise further during the afternoon. \nWind: Winds were blowing at light-to-moderate strength from southerly to southwesterly directions.\nFollowing a night of predominantly clear skies it will be sunny to start with. During the course of the day, clouds will move in, initially in southern regions, during the afternoon also in western regions. \nFresh snow: - \nTemperature: At midday at 2000 m, between +12 \u00b0C in the northern regions and +8 \u00b0C in the southern regions. Zero-degree level at 3800 m. \nWind: - Winds in early morning will still be blowing at moderate strength, intensifying to strong-to-storm strength during the course of the day, from southwesterly directions; \n - in the Alpine valleys of the north, a strong foehn wind will prevail.", "bulletinID": "89485858948591_pm", "predecessor_id": "89485858948591", "avalancheActivityComment": "Only a little snow is lying. Dry avalanches are no longer to be expected.\nOn north facing slopes individual gliding avalanches and moist snow slides are possible." }, { "regions": [ { "regionID": "CH-6211" }, { "regionID": "CH-6111" }, { "regionID": "CH-5216" }, { "regionID": "CH-5123" }, { "regionID": "CH-7231" }, { "regionID": "CH-7122" }, { "regionID": "CH-7211" }, { "regionID": "CH-7221" }, { "regionID": "CH-5215" }, { "regionID": "CH-7114" }, { "regionID": "CH-7123" }, { "regionID": "CH-5231" }, { "regionID": "CH-5113" }, { "regionID": "CH-5223" }, { "regionID": "CH-5234" }, { "regionID": "CH-7113" }, { "regionID": "CH-5212" }, { "regionID": "CH-7125" }, { "regionID": "CH-5214" }, { "regionID": "CH-5221" }, { "regionID": "CH-7115" }, { "regionID": "CH-5112" }, { "regionID": "CH-7112" }, { "regionID": "CH-5222" }, { "regionID": "CH-7222" }, { "regionID": "CH-5111" }, { "regionID": "CH-7111" }, { "regionID": "CH-7126" }, { "regionID": "CH-7124" }, { "regionID": "CH-7121" }, { "regionID": "CH-6113" }, { "regionID": "CH-5122" }, { "regionID": "CH-6112" }, { "regionID": "CH-5232" }, { "regionID": "CH-5233" }, { "regionID": "CH-2224" }, { "regionID": "CH-6114" } ], "validTime": { "startTime": "2021-05-08T17:00:00+02:00", "endTime": "2021-05-09T12:00:00+02:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "2400" }, "customData": [], "mainValue": "moderate", "aspect": [ "N", "NE", "E", "W", "NW" ] } ], "avalancheProblems": [], "tendency": { "validTime": {}, "tendencyComment": "In the southern regions skies will be heavily overcast. On Monday, precipitation is anticipated, to start with in the Valais sector of the Main Alpine Ridge and in western Ticino. On Tuesday, snowfall is expected which will be intensive on the Main Alpine Ridge and southwards therefrom. The snowfall level on Monday will still lie at 2600 m, subsequently it will descend to 2000 m by Tuesday evening. In the northern regions, foehn-induced bright intervals are expected on Monday. On Tuesday, snowfall is expected, including in the northern regions above approximately 2000 m. \n On Monday, a storm-strength southerly wind will be blowing in all regions of Switzerland. On Monday night, the wind will incrementally slacken off, to start with in the western regions, subsequently also in the eastern regions. \n In the southern regions the danger of dry-snow avalanches will increase significantly at elevated altitudes. On Tuesday it is currently assumed that Danger Level 4 (High) will be reached. Above approximately 2500 m, naturally triggered dry-snow avalanches can be expected as a result of the fresh snow and strong-to-storm strength winds; and wet-snow avalanches below 2500 m, as a result of the intensive rainfall. In the northern regions, the avalanche danger levels are not expected to change significantly on Monday; on Tuesday danger levels will increase as a result of the fresh snow." }, "publicationTime": "2021-05-08T17:00:00+02:00", "avalancheActivityHighlights": "Considerable danger of dry and wet avalanches will be encountered in some regions", "snowpackStructureComment": "The great amounts of fresh snow which fell in the northern and western regions on Friday have by and large stabilised. The layers of fresh snow and freshly generated snowdrifts are still prone to triggering on high-altitude, steep north-facing slopes more than anywhere else. There, as the consequence of strong-velocity southerly winds, additional snowdrift accumulations are still being generated. In the south and in Grisons the snowdrift accumulations are relatively small. \n Beneath the fresh snow and snowdrifts of this week, the old snow is thoroughly wet below approximately 3000 m on east-facing, south-facing and west-facing slopes, and below 2200 to 2500 m on north-facing slopes. As a result of higher daytime temperatures, the stabilising crusts on the snowpack surface as well as inside the snow cover tend to soften up. During the course of the day, naturally triggered wet-snow avalanches can be expected. These releases can sweep along the entire snow cover with them, particularly on north-facing slopes below approximately 2500 m.", "wxSynopsisComment": "Following a night of clear skies it was predominantly sunny. During the course of the day it became significantly warmer. \nFresh snow: - \nTemperature: At midday at 2000 m, between +5 \u00b0C in the western regions, +1 \u00b0C in the eastern regions and +3 \u00b0C in the southern regions. Temperatures tended to rise further during the afternoon. \nWind: Winds were blowing at light-to-moderate strength from southerly to southwesterly directions.\nFollowing a night of predominantly clear skies it will be sunny to start with. During the course of the day, clouds will move in, initially in southern regions, during the afternoon also in western regions. \nFresh snow: - \nTemperature: At midday at 2000 m, between +12 \u00b0C in the northern regions and +8 \u00b0C in the southern regions. Zero-degree level at 3800 m. \nWind: - Winds in early morning will still be blowing at moderate strength, intensifying to strong-to-storm strength during the course of the day, from southwesterly directions; \n - in the Alpine valleys of the north, a strong foehn wind will prevail.", "bulletinID": "89485848948590", "avalancheActivityComment": "As a consequence of a gathering strong southerly wind, avalanche prone wind slabs will form in the course of the day at elevated altitudes. Fresh and older wind slabs are to be evaluated with care and prudence in steep terrain. They are clearly recognisable to the trained eye. In high Alpine regions the avalanche prone locations are more prevalent and the danger is greater. \n Careful route selection is recommended." }, { "regions": [ { "regionID": "CH-6211" }, { "regionID": "CH-6111" }, { "regionID": "CH-5216" }, { "regionID": "CH-5123" }, { "regionID": "CH-7231" }, { "regionID": "CH-7122" }, { "regionID": "CH-7211" }, { "regionID": "CH-7221" }, { "regionID": "CH-5215" }, { "regionID": "CH-7114" }, { "regionID": "CH-7123" }, { "regionID": "CH-5231" }, { "regionID": "CH-5113" }, { "regionID": "CH-5223" }, { "regionID": "CH-5234" }, { "regionID": "CH-7113" }, { "regionID": "CH-5212" }, { "regionID": "CH-7125" }, { "regionID": "CH-5214" }, { "regionID": "CH-5221" }, { "regionID": "CH-7115" }, { "regionID": "CH-5112" }, { "regionID": "CH-7112" }, { "regionID": "CH-5222" }, { "regionID": "CH-7222" }, { "regionID": "CH-5111" }, { "regionID": "CH-7111" }, { "regionID": "CH-7126" }, { "regionID": "CH-7124" }, { "regionID": "CH-7121" }, { "regionID": "CH-6113" }, { "regionID": "CH-5122" }, { "regionID": "CH-6112" }, { "regionID": "CH-5232" }, { "regionID": "CH-5233" }, { "regionID": "CH-2224" }, { "regionID": "CH-6114" } ], "validTime": { "startTime": "2021-05-09T12:00:00+02:00", "endTime": "2021-05-09T17:00:00+02:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "2400" }, "customData": [], "mainValue": "considerable", "aspect": [ "N", "NE", "E", "W", "NW" ] } ], "avalancheProblems": [], "tendency": { "validTime": {}, "tendencyComment": "In the southern regions skies will be heavily overcast. On Monday, precipitation is anticipated, to start with in the Valais sector of the Main Alpine Ridge and in western Ticino. On Tuesday, snowfall is expected which will be intensive on the Main Alpine Ridge and southwards therefrom. The snowfall level on Monday will still lie at 2600 m, subsequently it will descend to 2000 m by Tuesday evening. In the northern regions, foehn-induced bright intervals are expected on Monday. On Tuesday, snowfall is expected, including in the northern regions above approximately 2000 m. \n On Monday, a storm-strength southerly wind will be blowing in all regions of Switzerland. On Monday night, the wind will incrementally slacken off, to start with in the western regions, subsequently also in the eastern regions. \n In the southern regions the danger of dry-snow avalanches will increase significantly at elevated altitudes. On Tuesday it is currently assumed that Danger Level 4 (High) will be reached. Above approximately 2500 m, naturally triggered dry-snow avalanches can be expected as a result of the fresh snow and strong-to-storm strength winds; and wet-snow avalanches below 2500 m, as a result of the intensive rainfall. In the northern regions, the avalanche danger levels are not expected to change significantly on Monday; on Tuesday danger levels will increase as a result of the fresh snow." }, "publicationTime": "2021-05-08T17:00:00+02:00", "avalancheActivityHighlights": "Considerable danger of dry and wet avalanches will be encountered in some regions", "snowpackStructureComment": "The great amounts of fresh snow which fell in the northern and western regions on Friday have by and large stabilised. The layers of fresh snow and freshly generated snowdrifts are still prone to triggering on high-altitude, steep north-facing slopes more than anywhere else. There, as the consequence of strong-velocity southerly winds, additional snowdrift accumulations are still being generated. In the south and in Grisons the snowdrift accumulations are relatively small. \n Beneath the fresh snow and snowdrifts of this week, the old snow is thoroughly wet below approximately 3000 m on east-facing, south-facing and west-facing slopes, and below 2200 to 2500 m on north-facing slopes. As a result of higher daytime temperatures, the stabilising crusts on the snowpack surface as well as inside the snow cover tend to soften up. During the course of the day, naturally triggered wet-snow avalanches can be expected. These releases can sweep along the entire snow cover with them, particularly on north-facing slopes below approximately 2500 m.", "wxSynopsisComment": "Following a night of clear skies it was predominantly sunny. During the course of the day it became significantly warmer. \nFresh snow: - \nTemperature: At midday at 2000 m, between +5 \u00b0C in the western regions, +1 \u00b0C in the eastern regions and +3 \u00b0C in the southern regions. Temperatures tended to rise further during the afternoon. \nWind: Winds were blowing at light-to-moderate strength from southerly to southwesterly directions.\nFollowing a night of predominantly clear skies it will be sunny to start with. During the course of the day, clouds will move in, initially in southern regions, during the afternoon also in western regions. \nFresh snow: - \nTemperature: At midday at 2000 m, between +12 \u00b0C in the northern regions and +8 \u00b0C in the southern regions. Zero-degree level at 3800 m. \nWind: - Winds in early morning will still be blowing at moderate strength, intensifying to strong-to-storm strength during the course of the day, from southwesterly directions; \n - in the Alpine valleys of the north, a strong foehn wind will prevail.", "bulletinID": "89485848948590_pm", "predecessor_id": "89485848948590", "avalancheActivityComment": "As a consequence of a gathering strong southerly wind, avalanche prone wind slabs will form in the course of the day at elevated altitudes. Fresh and older wind slabs are to be evaluated with care and prudence in steep terrain. They are clearly recognisable to the trained eye. In high Alpine regions the avalanche prone locations are more prevalent and the danger is greater. \n Careful route selection is recommended.\nThe danger of wet avalanches will increase significantly during the day. As a consequence of warming during the day and solar radiation wet avalanches are to be expected, even large ones in isolated cases. This applies on east, south and west facing slopes in all altitude zones, as well as on north facing slopes below approximately 2800 m. Backcountry tours should be started very early and concluded timely." }, { "regions": [ { "regionID": "CH-2122" }, { "regionID": "CH-3224" }, { "regionID": "CH-4223" }, { "regionID": "CH-1246" }, { "regionID": "CH-5211" }, { "regionID": "CH-3113" }, { "regionID": "CH-2223" }, { "regionID": "CH-1233" }, { "regionID": "CH-4115" }, { "regionID": "CH-3222" }, { "regionID": "CH-4215" }, { "regionID": "CH-4211" }, { "regionID": "CH-1312" }, { "regionID": "CH-5124" }, { "regionID": "CH-4232" }, { "regionID": "CH-1222" }, { "regionID": "CH-4224" }, { "regionID": "CH-4113" }, { "regionID": "CH-1228" }, { "regionID": "CH-2212" }, { "regionID": "CH-2222" }, { "regionID": "CH-4121" }, { "regionID": "CH-2221" }, { "regionID": "CH-1223" }, { "regionID": "CH-2134" }, { "regionID": "CH-1231" }, { "regionID": "CH-2123" }, { "regionID": "CH-3114" }, { "regionID": "CH-4241" }, { "regionID": "CH-1227" }, { "regionID": "CH-3112" }, { "regionID": "CH-4222" }, { "regionID": "CH-1232" }, { "regionID": "CH-4243" }, { "regionID": "CH-1226" }, { "regionID": "CH-4123" }, { "regionID": "CH-1244" }, { "regionID": "CH-4122" }, { "regionID": "CH-4221" }, { "regionID": "CH-4114" }, { "regionID": "CH-4244" }, { "regionID": "CH-1247" }, { "regionID": "CH-4112" }, { "regionID": "CH-5121" }, { "regionID": "CH-4125" }, { "regionID": "CH-4213" }, { "regionID": "CH-4116" }, { "regionID": "CH-2211" }, { "regionID": "CH-4212" }, { "regionID": "CH-4214" }, { "regionID": "CH-3223" }, { "regionID": "CH-1114" }, { "regionID": "CH-1243" }, { "regionID": "CH-1245" }, { "regionID": "CH-4124" }, { "regionID": "CH-4231" }, { "regionID": "CH-1225" }, { "regionID": "CH-4111" }, { "regionID": "CH-4225" }, { "regionID": "CH-3311" }, { "regionID": "CH-1234" }, { "regionID": "CH-1224" }, { "regionID": "CH-4242" } ], "validTime": { "startTime": "2021-05-08T17:00:00+02:00", "endTime": "2021-05-09T12:00:00+02:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "2400" }, "customData": [], "mainValue": "considerable", "aspect": [ "N", "NE", "E", "W", "NW" ] } ], "avalancheProblems": [], "tendency": { "validTime": {}, "tendencyComment": "In the southern regions skies will be heavily overcast. On Monday, precipitation is anticipated, to start with in the Valais sector of the Main Alpine Ridge and in western Ticino. On Tuesday, snowfall is expected which will be intensive on the Main Alpine Ridge and southwards therefrom. The snowfall level on Monday will still lie at 2600 m, subsequently it will descend to 2000 m by Tuesday evening. In the northern regions, foehn-induced bright intervals are expected on Monday. On Tuesday, snowfall is expected, including in the northern regions above approximately 2000 m. \n On Monday, a storm-strength southerly wind will be blowing in all regions of Switzerland. On Monday night, the wind will incrementally slacken off, to start with in the western regions, subsequently also in the eastern regions. \n In the southern regions the danger of dry-snow avalanches will increase significantly at elevated altitudes. On Tuesday it is currently assumed that Danger Level 4 (High) will be reached. Above approximately 2500 m, naturally triggered dry-snow avalanches can be expected as a result of the fresh snow and strong-to-storm strength winds; and wet-snow avalanches below 2500 m, as a result of the intensive rainfall. In the northern regions, the avalanche danger levels are not expected to change significantly on Monday; on Tuesday danger levels will increase as a result of the fresh snow." }, "publicationTime": "2021-05-08T17:00:00+02:00", "avalancheActivityHighlights": "Considerable danger of dry and wet avalanches will be encountered in some regions", "snowpackStructureComment": "The great amounts of fresh snow which fell in the northern and western regions on Friday have by and large stabilised. The layers of fresh snow and freshly generated snowdrifts are still prone to triggering on high-altitude, steep north-facing slopes more than anywhere else. There, as the consequence of strong-velocity southerly winds, additional snowdrift accumulations are still being generated. In the south and in Grisons the snowdrift accumulations are relatively small. \n Beneath the fresh snow and snowdrifts of this week, the old snow is thoroughly wet below approximately 3000 m on east-facing, south-facing and west-facing slopes, and below 2200 to 2500 m on north-facing slopes. As a result of higher daytime temperatures, the stabilising crusts on the snowpack surface as well as inside the snow cover tend to soften up. During the course of the day, naturally triggered wet-snow avalanches can be expected. These releases can sweep along the entire snow cover with them, particularly on north-facing slopes below approximately 2500 m.", "wxSynopsisComment": "Following a night of clear skies it was predominantly sunny. During the course of the day it became significantly warmer. \nFresh snow: - \nTemperature: At midday at 2000 m, between +5 \u00b0C in the western regions, +1 \u00b0C in the eastern regions and +3 \u00b0C in the southern regions. Temperatures tended to rise further during the afternoon. \nWind: Winds were blowing at light-to-moderate strength from southerly to southwesterly directions.\nFollowing a night of predominantly clear skies it will be sunny to start with. During the course of the day, clouds will move in, initially in southern regions, during the afternoon also in western regions. \nFresh snow: - \nTemperature: At midday at 2000 m, between +12 \u00b0C in the northern regions and +8 \u00b0C in the southern regions. Zero-degree level at 3800 m. \nWind: - Winds in early morning will still be blowing at moderate strength, intensifying to strong-to-storm strength during the course of the day, from southwesterly directions; \n - in the Alpine valleys of the north, a strong foehn wind will prevail.", "bulletinID": "89485878948590", "avalancheActivityComment": "As a consequence of a gathering strong southerly wind, avalanche prone wind slabs will form in the course of the day at elevated altitudes. They are clearly recognisable to the trained eye. In addition the large wind slabs of Friday are capable of being triggered in some cases still. Single winter sport participants can release avalanches. These can in isolated cases reach large size. \n Ski touring calls for experience in the assessment of avalanche danger." }, { "regions": [ { "regionID": "CH-2122" }, { "regionID": "CH-3224" }, { "regionID": "CH-4223" }, { "regionID": "CH-1246" }, { "regionID": "CH-5211" }, { "regionID": "CH-3113" }, { "regionID": "CH-2223" }, { "regionID": "CH-1233" }, { "regionID": "CH-4115" }, { "regionID": "CH-3222" }, { "regionID": "CH-4215" }, { "regionID": "CH-4211" }, { "regionID": "CH-1312" }, { "regionID": "CH-5124" }, { "regionID": "CH-4232" }, { "regionID": "CH-1222" }, { "regionID": "CH-4224" }, { "regionID": "CH-4113" }, { "regionID": "CH-1228" }, { "regionID": "CH-2212" }, { "regionID": "CH-2222" }, { "regionID": "CH-4121" }, { "regionID": "CH-2221" }, { "regionID": "CH-1223" }, { "regionID": "CH-2134" }, { "regionID": "CH-1231" }, { "regionID": "CH-2123" }, { "regionID": "CH-3114" }, { "regionID": "CH-4241" }, { "regionID": "CH-1227" }, { "regionID": "CH-3112" }, { "regionID": "CH-4222" }, { "regionID": "CH-1232" }, { "regionID": "CH-4243" }, { "regionID": "CH-1226" }, { "regionID": "CH-4123" }, { "regionID": "CH-1244" }, { "regionID": "CH-4122" }, { "regionID": "CH-4221" }, { "regionID": "CH-4114" }, { "regionID": "CH-4244" }, { "regionID": "CH-1247" }, { "regionID": "CH-4112" }, { "regionID": "CH-5121" }, { "regionID": "CH-4125" }, { "regionID": "CH-4213" }, { "regionID": "CH-4116" }, { "regionID": "CH-2211" }, { "regionID": "CH-4212" }, { "regionID": "CH-4214" }, { "regionID": "CH-3223" }, { "regionID": "CH-1114" }, { "regionID": "CH-1243" }, { "regionID": "CH-1245" }, { "regionID": "CH-4124" }, { "regionID": "CH-4231" }, { "regionID": "CH-1225" }, { "regionID": "CH-4111" }, { "regionID": "CH-4225" }, { "regionID": "CH-3311" }, { "regionID": "CH-1234" }, { "regionID": "CH-1224" }, { "regionID": "CH-4242" } ], "validTime": { "startTime": "2021-05-09T12:00:00+02:00", "endTime": "2021-05-09T17:00:00+02:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "2400" }, "customData": [], "mainValue": "considerable", "aspect": [ "N", "NE", "E", "W", "NW" ] } ], "avalancheProblems": [], "tendency": { "validTime": {}, "tendencyComment": "In the southern regions skies will be heavily overcast. On Monday, precipitation is anticipated, to start with in the Valais sector of the Main Alpine Ridge and in western Ticino. On Tuesday, snowfall is expected which will be intensive on the Main Alpine Ridge and southwards therefrom. The snowfall level on Monday will still lie at 2600 m, subsequently it will descend to 2000 m by Tuesday evening. In the northern regions, foehn-induced bright intervals are expected on Monday. On Tuesday, snowfall is expected, including in the northern regions above approximately 2000 m. \n On Monday, a storm-strength southerly wind will be blowing in all regions of Switzerland. On Monday night, the wind will incrementally slacken off, to start with in the western regions, subsequently also in the eastern regions. \n In the southern regions the danger of dry-snow avalanches will increase significantly at elevated altitudes. On Tuesday it is currently assumed that Danger Level 4 (High) will be reached. Above approximately 2500 m, naturally triggered dry-snow avalanches can be expected as a result of the fresh snow and strong-to-storm strength winds; and wet-snow avalanches below 2500 m, as a result of the intensive rainfall. In the northern regions, the avalanche danger levels are not expected to change significantly on Monday; on Tuesday danger levels will increase as a result of the fresh snow." }, "publicationTime": "2021-05-08T17:00:00+02:00", "avalancheActivityHighlights": "Considerable danger of dry and wet avalanches will be encountered in some regions", "snowpackStructureComment": "The great amounts of fresh snow which fell in the northern and western regions on Friday have by and large stabilised. The layers of fresh snow and freshly generated snowdrifts are still prone to triggering on high-altitude, steep north-facing slopes more than anywhere else. There, as the consequence of strong-velocity southerly winds, additional snowdrift accumulations are still being generated. In the south and in Grisons the snowdrift accumulations are relatively small. \n Beneath the fresh snow and snowdrifts of this week, the old snow is thoroughly wet below approximately 3000 m on east-facing, south-facing and west-facing slopes, and below 2200 to 2500 m on north-facing slopes. As a result of higher daytime temperatures, the stabilising crusts on the snowpack surface as well as inside the snow cover tend to soften up. During the course of the day, naturally triggered wet-snow avalanches can be expected. These releases can sweep along the entire snow cover with them, particularly on north-facing slopes below approximately 2500 m.", "wxSynopsisComment": "Following a night of clear skies it was predominantly sunny. During the course of the day it became significantly warmer. \nFresh snow: - \nTemperature: At midday at 2000 m, between +5 \u00b0C in the western regions, +1 \u00b0C in the eastern regions and +3 \u00b0C in the southern regions. Temperatures tended to rise further during the afternoon. \nWind: Winds were blowing at light-to-moderate strength from southerly to southwesterly directions.\nFollowing a night of predominantly clear skies it will be sunny to start with. During the course of the day, clouds will move in, initially in southern regions, during the afternoon also in western regions. \nFresh snow: - \nTemperature: At midday at 2000 m, between +12 \u00b0C in the northern regions and +8 \u00b0C in the southern regions. Zero-degree level at 3800 m. \nWind: - Winds in early morning will still be blowing at moderate strength, intensifying to strong-to-storm strength during the course of the day, from southwesterly directions; \n - in the Alpine valleys of the north, a strong foehn wind will prevail.", "bulletinID": "89485878948590_pm", "predecessor_id": "89485878948590", "avalancheActivityComment": "As a consequence of a gathering strong southerly wind, avalanche prone wind slabs will form in the course of the day at elevated altitudes. They are clearly recognisable to the trained eye. In addition the large wind slabs of Friday are capable of being triggered in some cases still. Single winter sport participants can release avalanches. These can in isolated cases reach large size. \n Ski touring calls for experience in the assessment of avalanche danger.\nThe danger of wet avalanches will increase significantly during the day. As a consequence of warming during the day and solar radiation wet avalanches are to be expected, even large ones in isolated cases. This applies on east, south and west facing slopes in all altitude zones, as well as on north facing slopes below approximately 2800 m. Backcountry tours should be started very early and concluded timely." } ]