{ "bulletins": [ { "regions": [ { "regionID": "AT-05-19" }, { "regionID": "AT-05-20" }, { "regionID": "AT-05-21" }, { "regionID": "AT-05-12" } ], "validTime": { "startTime": "2022-02-14T23:00:00+00:00", "endTime": "2022-02-15T23:00:00+00:00" }, "source": {}, "dangerRatings": [ { "elevation": {}, "customData": [], "mainValue": "low" } ], "avalancheProblems": [ { "dangerRating": { "elevation": {}, "customData": [], "aspect": [ "N", "NE", "E", "W", "NW" ] }, "problemType": "persistent_weak_layers", "comment": "seldom triggerable in rims of gullies and bowls, generally large additional loading" } ], "tendency": { "validTime": {}, "tendencyComment": "On Wednesday night, stormy winds and warm fresh snow or rain. Danger level: moderate (2) due to wet snow / glide-snow problem" }, "bulletinID": "RID1665RGR1", "publicationTime": "2022-02-14T17:00:00+00:00", "avalancheActivityHighlights": "Few danger zones, only minor fresh snow", "wxSynopsisComment": "On Tuesday, dense cloud cover with snowfall will move in, visibility will deteriorate swiftly. Fresh snow in 24 hours: 5-10 cm. Winds will shift to NW and reach 30 km/hr. At 2000 m: -5 degrees.\r\nOn Wednesday, adequate visibility to start with, a brief interim of sunshine, then cloud will move in, summits disappear in fog. Later in the afternoon/evening the next round of precipitation will arrive with strong-to-stormy westerly winds. Snowfall level: 1500 m. At 2000 m: from -4 to 0 degrees.", "avalancheActivityComment": "Avalanche danger continues to be LOW, isolated avalanche prone locations are located in extremely steep gullies on very steep shallow-snow slopes, especially on east-facing slopes and in extended northern aspects.\r\nPotential trigger points occur particularly in transitions from shallow to deeper snow and in shallow-snow rimline zones. Triggering is unlikely, needs Size-2 additional loading, potential avalanches can become medium-to-large sized.", "snowpackStructureComment": "A settled and stable old snowpack dominates. Atop of it lies a thin layer of fresh snow, somewhat wind-impacted but without relevant generation of snowdrifts. Enduring soft layers of faceted crystals inside the old snowpack are not triggerable currently." }, { "regions": [ { "regionID": "AT-05-16" }, { "regionID": "AT-05-17" }, { "regionID": "AT-05-18" }, { "regionID": "AT-05-14" }, { "regionID": "AT-05-15" }, { "regionID": "AT-05-13" }, { "regionID": "AT-05-09" }, { "regionID": "AT-05-08" }, { "regionID": "AT-05-04" }, { "regionID": "AT-05-02" }, { "regionID": "AT-05-01" } ], "validTime": { "startTime": "2022-02-14T23:00:00+00:00", "endTime": "2022-02-15T23:00:00+00:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "1500" }, "customData": [], "mainValue": "moderate" }, { "elevation": { "upperBound": "1500" }, "customData": [], "mainValue": "low" } ], "avalancheProblems": [ { "dangerRating": { "elevation": {}, "customData": [], "aspect": [ "N", "NE", "E", "W", "NW" ] }, "problemType": "persistent_weak_layers", "comment": ">1600m, isolated triggerable in transitions from shallow to deep snow, large additional loading" }, { "dangerRating": { "elevation": {}, "customData": [], "aspect": [ "N", "NE", "E", "SE", "NW" ] }, "problemType": "wind_drifted_snow", "comment": "thin snowdrift patches, mostly near ridgelines, mostly small, risk of falling on steep slopes" } ], "tendency": { "validTime": {}, "tendencyComment": "On Wednesday night, stormy winds and warm fresh snow or rain. Thus, the overall situation will change. Danger level: moderate (2) or considerable (3) due to wet snow / glide-snow problem. Snowdrift problem: see above." }, "bulletinID": "RID1665RGR2", "publicationTime": "2022-02-14T17:00:00+00:00", "avalancheActivityHighlights": "Caution on very steep, shallow-snow slopes and on steep ridgeline slopes.", "wxSynopsisComment": "On Tuesday, dense cloud cover with snowfall will move in, visibility will deteriorate swiftly. Fresh snow in 24 hours: 5-10 cm. Winds will shift to NW and reach 30 km/hr. At 2000 m: -5 degrees, at 3000 m -11 degrees.\r\nOn Wednesday, adequate visibility to start with, a brief interim of sunshine, then cloud will move in, summits disappear in fog. Later in the afternoon/evening the next round of precipitation will arrive with strong-to-stormy westerly winds. Snowfall level: 1500 m. At 2000 m: from -4 to 0 degrees; at 3000 m: -9 to -4 degrees.", "avalancheActivityComment": "Avalanche danger above 1500 m is MODERATE, below that altitude danger is LOW.\r\nTwo moderate problems: persistent weak layer \u2013 this is the dominant theme of the moment, though hardly detectable from the snowpack surface. Potential weak layers inside the snowpack are likeliest in transitions into wind-loaded zones (often where snow is shallow). All in all the terrain has few spots where large additional loading (a fall, a group without distances, stomping) can trigger a slab avalanche. But if a slab triggers it can grow to large size.\r\nSecond problem: snowdrift threat \u2013 the fresh drift are small and thin. On steep slopes they can trigger a small avalanche. In extremely steep terrain they can be triggered by a fall.", "snowpackStructureComment": "The latest fresh snow was transported somewhat by southerly winds, small snowdrift accumulations were generated, mostly thin and not extensive. Atop those, a new layer which is being transported by NW winds in ridgeline zones.\r\nBeneath the new snow are compact layers with the dynamic forces well distributed. Inside the snowpack, particularly on north-facing slopes, are faceted crystal weak layers which could tend towards fracture propagation." }, { "regions": [ { "regionID": "AT-05-11" }, { "regionID": "AT-05-07" }, { "regionID": "AT-05-06" }, { "regionID": "AT-05-10" }, { "regionID": "AT-05-05" }, { "regionID": "AT-05-03" } ], "validTime": { "startTime": "2022-02-14T23:00:00+00:00", "endTime": "2022-02-15T23:00:00+00:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "1800" }, "customData": [], "mainValue": "considerable" }, { "elevation": { "upperBound": "1800" }, "customData": [], "mainValue": "low" } ], "avalancheProblems": [ { "dangerRating": { "elevation": {}, "customData": [], "aspect": [ "N", "NE", "E", "SE", "S", "NW" ] }, "problemType": "wind_drifted_snow", "comment": "fresh and older drifts, easily triggered (thus: danger level 3)" }, { "dangerRating": { "elevation": {}, "customData": [], "aspect": [ "N", "NE", "E", "W", "NW" ] }, "problemType": "persistent_weak_layers", "comment": ">1800 m isolated triggerable in transitions from shallow to deep snow, in shallow snow, large additional loading" } ], "tendency": { "validTime": {}, "tendencyComment": "Snowdrift problem / Persistent weak layer. CONSIDERABLE danger (3). Caution: the new loading can fracture down to deeper layers and become large-sized avalanches." }, "bulletinID": "RID1665RGR3", "publicationTime": "2022-02-14T17:00:00+00:00", "avalancheActivityHighlights": "Considerable danger - small avalanches can fracture down to deeper layers", "wxSynopsisComment": "On Tuesday, dense cloud cover with snowfall will move in, visibility will deteriorate swiftly. Fresh snow in 24 hours: 5-10 cm. Winds will shift to NW and reach 30 km/hr. At 2000 m: -5 degrees.\r\nOn Wednesday, adequate visibility to start with, a brief interim of sunshine, then cloud will move in, summits disappear in fog. Later in the afternoon/evening the next round of precipitation will arrive with strong-to-stormy westerly winds. Snowfall level: 1500 m. At 2000 m: from -4 to 0 degrees.", "avalancheActivityComment": "Avalanche danger above 1800 m is CONSIDERABLE, below that altitude danger is LOW. Restraint is important. Besides, visibility does not always permit clear assessment on-site.\r\nMain problem: snowdrift threat \u2013 the fresh foehn-induced drifts are highly varied with differing effects from valley to valley. Some are small and thin, often wide-ranging on freshly loaded slopes. The impulse of one persons is enough to trigger an avalanche (small-to-large). Experience is imperative. Danger zones are easily recognized.\r\nSecond problem: persistent weak layer \u2013hardly detectable from the snowpack surface. Potential weak layers inside the snowpack are likeliest in transitions into wind-loaded zones (often where snow is shallow). All in all the terrain has few spots where large additional loading (a fall, a group without distances, stomping) can trigger a slab avalanche. But if a slab triggers it can grow to large size.", "snowpackStructureComment": "The latest cold snow was transported somewhat by NW winds, small snowdrift accumulations were generated, mostly thin and not extensive. \r\nBeneath the new snow are compact layers with the dynamic forces well distributed. Inside the snowpack, particularly on north-facing slopes, are faceted crystal weak layers which could tend towards fracture propagation." } ] }