{ "bulletins": [ { "regions": [ { "regionID": "AT-05-19" }, { "regionID": "AT-05-20" }, { "regionID": "AT-05-21" } ], "validTime": { "startTime": "2021-02-08T17:00:00+00:00", "endTime": "2021-02-09T17:00:00+00:00" }, "source": {}, "dangerRatings": [ { "elevation": {}, "customData": [], "mainValue": "low" } ], "avalancheProblems": [ { "dangerRating": { "elevation": {}, "customData": [], "aspect": [ "N", "NE", "NW" ] }, "problemType": "favourable_situation", "comment": "very few danger zones" } ], "tendency": { "validTime": {}, "tendencyComment": "No significant change on Wednesday. On Wednesday night: 10 to 15 cm of fresh snow anticipated, with wind and dropping temperatures." }, "bulletinID": "RID366RGR1", "publicationTime": "2021-02-08T17:00:00+00:00", "avalancheActivityHighlights": "Relatively stable snowpack", "wxSynopsisComment": "In early and late morning, cloudy skies. The higher peaks could be veiled in clouds. Light minor snowfall is possible around midday. In the afternoon, skies will brighten, a bit of sunshine is possible. Westerly winds at 20 km/hr. At 1500 m: -5 degrees.", "avalancheActivityComment": "Avalanche danger is LOW, but not non-existent. On some spots in steep terrain (\u00fcber 40\u00b0 gradients) in NW-NE-E aspects, a slab avalanche can be triggered by large additional loading. Likelihood is low. Mostly applies to shallow-snow zones and transitions. Naturally triggered avalanches are highly unlikely.", "snowpackStructureComment": "Dry powder snow (5-10 cm) was deposited on a firm, compact old snowpack surface. Potential weak layers inside the old snow (esp. the loose fundament) are well covered, thus, unlikely to trigger." }, { "regions": [ { "regionID": "AT-05-16" }, { "regionID": "AT-05-17" }, { "regionID": "AT-05-18" }, { "regionID": "AT-05-14" }, { "regionID": "AT-05-15" }, { "regionID": "AT-05-11" }, { "regionID": "AT-05-10" }, { "regionID": "AT-05-13" }, { "regionID": "AT-05-12" }, { "regionID": "AT-05-08" }, { "regionID": "AT-05-09" } ], "validTime": { "startTime": "2021-02-08T17:00:00+00:00", "endTime": "2021-02-09T17:00:00+00:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "1800" }, "customData": [], "mainValue": "moderate" }, { "elevation": { "upperBound": "1800" }, "customData": [], "mainValue": "low" } ], "avalancheProblems": [ { "dangerRating": { "elevation": {}, "customData": [], "aspect": [ "N", "NE", "E", "W", "NW" ] }, "problemType": "persistent_weak_layers", "comment": "triggerable in transitions from shallow to deep snow above 2000 m" }, { "dangerRating": { "elevation": {}, "customData": [], "aspect": [ "N", "NE", "E", "W", "NW" ] }, "problemType": "wind_drifted_snow", "comment": "near ridgelines, mostly thin and small-spread" } ], "tendency": { "validTime": {}, "tendencyComment": "No significant change. On Wednesday night: 10-15 cm of fresh snow, amid wind and lower temperatures." }, "bulletinID": "RID366RGR2", "publicationTime": "2021-02-08T17:00:00+00:00", "avalancheActivityHighlights": "Caution in shallow-snow zones + steep slopes near ridgelines", "wxSynopsisComment": "In early and late morning, cloudy skies. The higher peaks could be veiled in clouds. Light minor snowfall is possible around midday. In the afternoon, skies will brighten, a bit of sunshine is possible. Westerly winds at 30 km/hr. At 2000 m: -6 degrees; at 2000 m: -10 degrees.", "avalancheActivityComment": "Above 1800 m the danger of slab avalanches is MODERATE. Below 1800 m danger is LOW. Main problem: old-snow. Isolated avalanche prone locations occur in NW-NE-E aspects. Caution is urged on very steep to extremely steep slopes where the snow is shallow are in transitions to wind-loaded zones. Triggering is possible primarily by large additional loading. The slabs can be medium, in isolated cases also large size.Second (secondary) problem: thin, small snowdrift patches on north and east-facing slopes, near ridgelines, easy to recognize and easily triggered in many places. Generally small-sized.", "snowpackStructureComment": "Fresh snow (10-20 cm) from Sunday/Monday above the timberline, was hardly transported and has adequate bonding to the snow base up to 2000 m.  Above 2000 m, small snowdrift accumulations and patches on thin melt-freeze crusts can be triggered.\r\nInside the old snow are persistent weak layers (at ground level and in the upper third of the snowpack, mostly on north and east-facing slopes at 1800-2200 m). These ugly layers are mostly covered (95%).\r\nThe recently moist snowpack has regained firmness due to the lower temperatures." }, { "regions": [ { "regionID": "AT-05-07" }, { "regionID": "AT-05-06" }, { "regionID": "AT-05-05" }, { "regionID": "AT-05-04" }, { "regionID": "AT-05-03" }, { "regionID": "AT-05-02" }, { "regionID": "AT-05-01" } ], "validTime": { "startTime": "2021-02-08T17:00:00+00:00", "endTime": "2021-02-09T17:00:00+00:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "2000" }, "customData": [], "mainValue": "considerable" }, { "elevation": { "upperBound": "2000" }, "customData": [], "mainValue": "moderate" } ], "avalancheProblems": [ { "dangerRating": { "elevation": {}, "customData": [], "aspect": [ "N", "NE", "E", "W", "NW" ] }, "problemType": "wind_drifted_snow", "comment": "near ridgelines, also distant from ridges in foehn-exposed valleys, easily triggered" }, { "dangerRating": { "elevation": {}, "customData": [], "aspect": [ "N", "NE", "E", "W", "NW" ] }, "problemType": "persistent_weak_layers", "comment": "triggerable in steep shallow-snow zones" } ], "tendency": { "validTime": {}, "tendencyComment": "On Wednesday, renewed southerly foehn wind. The snowdrift situation will remain intact. Considerable danger (3) above the treeline." }, "bulletinID": "RID366RGR3", "publicationTime": "2021-02-08T17:00:00+00:00", "avalancheActivityHighlights": "Fresh snowdrift accumulations due to nocturnal foehn", "wxSynopsisComment": "Following a windy night (foehn), skies will be overcast during the daytime. Higher peaks can be veiled in clouds. Occasional minor snowfall is possible. Strong-velocity southerly winds will swiftly slacken off in the morning, later on be blowing at 20-30 km/hr. At 2000 m: -6 degrees; at 3000 m, -10 degrees.", "avalancheActivityComment": "Above 2000 m, danger of slab avalanches is CONSIDERABLE. Main problem: fresh snowdrifts.\r\nEasily recognized snowdrift accumulations on steep to extremely steep north-facing slopes, in gullies, can be triggered even by the weight of one single skier. Avalanche prone locations are found especially near ridgelines, also distant from ridgelines in the classic foehn-exposed valleys and mountain lanes. Avalanches can grow to medium-to-large size.\r\nOn sunny and rocky steep slopes, loose-snow avalanches are possible. Isolated medium-sized glide-snow avalanches are also conceivable.", "snowpackStructureComment": "Fresh snow (20-40 cm) fell on Sunday night. On Mondy night, foehn wind will transport the dry fresh snow. It is prone to triggering. On the one hand, there is cold powder on north-facing slopes, on the other, the snowdrift masses and patches can be triggered atop thin melt-freeze crusts.\r\nInside the old snow are persistent weak layers (at ground level and in the upper third of the snowpack, mostly on north and east-facing slopes at 1800-2200 m). These ugly layers are mostly covered (95%)." } ] }