{ "bulletins": [ { "regions": [ { "regionID": "GB-SCT-7" } ], "validTime": { "startTime": "2022-02-24T18:00:00", "endTime": "2022-02-25T18:00:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "800" }, "customData": [], "mainValue": "low", "aspect": [ "SW", "W", "NW" ] }, { "elevation": { "lowerBound": "800" }, "customData": [], "mainValue": "moderate", "aspect": [ "N", "NE", "E", "SE", "S" ] }, { "elevation": { "upperBound": "800" }, "customData": [], "mainValue": "low", "aspect": [ "N", "NE", "E", "SE", "S", "SW", "W", "NW" ] } ], "avalancheProblems": [ { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "wind_drifted_snow" }, { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "cornice_failure" } ], "tendency": { "validTime": {} }, "bulletinID": "GB-SCT-10172", "publicationTime": "2022-02-24T00:00:00", "avalancheActivityHighlights": "TO for 25.02. Unstable windslab on N-E-S above 800m. Elsewhere mostly good stability and shallow accumulations. Hazard Moderate.", "avalancheActivityComment": "Forecast Snow Stability: Unstable windslab will continue to accumulate on North through East to South aspects above 800 meters. These instabilities will be mainly present on steep wind sheltered terrain such as coire rims, gully tops and ridge flanks. Cornices will remain fragile on these aspects. Wind exposed aspects will continue to be scoured and generally stable. The avalanche hazard will be Moderate.", "snowpackStructureComment": "Forecast Weather Influences: There will be Strong West-North-West winds overnight veering North-Westerly and decreasing in strength to moderate by the morning, then becoming strong South-South-West. Moderate snowfall is expected overnight, drier during the day. Overnight the freezing level will be at 400 meters, rising to around 700 meters by the end of the forecast period. \nObserved Weather Influences: There was new snow to all levels with improving cover above 300 meters. Winds were strong South-Westerly. The freezing level was around 300 meters. \nObservedSnowStability: There is now a widespread surface crust above 500 meters. Moderately bonded windslab has accumulated on North through East to South-East aspects above 800 meters. Elsewhere the terrain is mostly scoured and stable with shallow accumulations of snow on wind sheltered slopes. The avalanche hazard is Moderate." }, { "regions": [ { "regionID": "GB-SCT-4" } ], "validTime": { "startTime": "2022-02-24T18:00:00", "endTime": "2022-02-25T18:00:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "750" }, "customData": [], "mainValue": "low", "aspect": [ "S", "SW", "W", "NW" ] }, { "elevation": { "lowerBound": "750" }, "customData": [], "mainValue": "moderate", "aspect": [ "N", "SE" ] }, { "elevation": { "lowerBound": "750" }, "customData": [], "mainValue": "considerable", "aspect": [ "NE", "E" ] }, { "elevation": { "upperBound": "750" }, "customData": [], "mainValue": "low", "aspect": [ "N", "SE", "S", "SW", "W", "NW" ] }, { "elevation": { "upperBound": "750" }, "customData": [], "mainValue": "moderate", "aspect": [ "NE", "E" ] } ], "avalancheProblems": [ { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "wind_drifted_snow" }, { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "cornice_failure" } ], "tendency": { "validTime": {} }, "bulletinID": "GB-SCT-10173", "publicationTime": "2022-02-24T00:00:00", "avalancheActivityHighlights": "GC for 25.2 Unstable windslab on N, E to SE aspects above 750m. Greatest on NE and E. Cornices fragile. Ava haz Considerable. ", "avalancheActivityComment": "Forecast Snow Stability: Further accumulations of poorly bonded windslab will add to existing unstable deposits, on North-East to South-East aspects above 750 metres. This will mainly affect steep wind sheltered locations such as gully tops, corrie rims, and scarp slopes. Fragile cornices will build above these aspects. North aspects above 750 metres will have areas of windslab in terrain features, due to cross-loading. Wind scoured slopes will remain icy and stable. The avalanche hazard will be Considerable.", "snowpackStructureComment": "Forecast Weather Influences: Overnight the winds will be strong and Westerly. They will then moderate and back to become Southerly during the morning. There will be light snow showers overnight, which will die out by daylight, to leave a largely dry day. Freezing level will be 400 metres overnight and slowly rise during the day to around 900 metres.\nObserved Weather Influences: There were snow showers down to glen level throughout the day, on strong West-South Westerly winds. The freezing level remained around 400 metres.\nObservedSnowStability: There was evidence that overnight soft windslab accumulated on North through East to South-East aspects above 750 metres, this deposition continued throughout the day. Instabilities were noted within this windslab. The greatest accumulations are in wind sheltered locations. The avalanche hazard is Considerable." }, { "regions": [ { "regionID": "GB-SCT-3" } ], "validTime": { "startTime": "2022-02-24T18:00:00", "endTime": "2022-02-25T18:00:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "850" }, "customData": [], "mainValue": "low", "aspect": [ "SW", "W" ] }, { "elevation": { "lowerBound": "850" }, "customData": [], "mainValue": "moderate", "aspect": [ "S", "NW" ] }, { "elevation": { "lowerBound": "850" }, "customData": [], "mainValue": "considerable", "aspect": [ "N", "NE", "E", "SE" ] }, { "elevation": { "upperBound": "850" }, "customData": [], "mainValue": "low", "aspect": [ "S", "SW", "W", "NW" ] }, { "elevation": { "upperBound": "850" }, "customData": [], "mainValue": "moderate", "aspect": [ "N", "NE", "E", "SE" ] } ], "avalancheProblems": [ { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "wind_drifted_snow" }, { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "cornice_failure" } ], "tendency": { "validTime": {} }, "bulletinID": "GB-SCT-10174", "publicationTime": "2022-02-24T00:00:00", "avalancheActivityHighlights": "LO for 25/2. Large areas unstable windslab N,NE,E,SE above 850m. Also other aspects and lower elevations. Cornices. Considerable Haz", "avalancheActivityComment": "Forecast Snow Stability: Large areas of unstable windslab will continue to develop with greatest accumulations on steep North through East to South-East aspects above 850 metres. Fragile cornices will be present above these aspects. More localised accumulations will exist on other aspects and at lower elevations. The avalanche hazard will be Considerable.", "snowpackStructureComment": "Forecast Weather Influences: Light overnight showers will be snow at most levels, clearing by morning to give a dry day. The freezing level will be 400 metres overnight, gradually rising to 800 metres by the end of the day. Winds will be strong Westerly overnight, decreasing to light and backing to become Southerly by morning, then gradually increase in strength through the day. \nObserved Weather Influences: Showers throughout the day were snow at most levels. Winds were strong West-South-Westerly. The freezing level was around 400 metres. \nObservedSnowStability: Unstable windslab is continuing to develop and becoming more widespread. Greatest accumulations are on North through East to South-East aspects above 850 metres. Fragile cornices are present above these aspects. Instabilities are also present in sheltered locations on other aspects due to cross loading and on steep slopes at lower elevations. The avalanche hazard is Considerable. " }, { "regions": [ { "regionID": "GB-SCT-2" } ], "validTime": { "startTime": "2022-02-24T18:00:00", "endTime": "2022-02-25T18:00:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "800" }, "customData": [], "mainValue": "low", "aspect": [ "SW", "W" ] }, { "elevation": { "lowerBound": "800" }, "customData": [], "mainValue": "moderate", "aspect": [ "S", "NW" ] }, { "elevation": { "lowerBound": "800" }, "customData": [], "mainValue": "considerable", "aspect": [ "N", "NE", "E", "SE" ] }, { "elevation": { "upperBound": "800" }, "customData": [], "mainValue": "low", "aspect": [ "S", "SW", "W", "NW" ] }, { "elevation": { "upperBound": "800" }, "customData": [], "mainValue": "moderate", "aspect": [ "N", "NE", "E", "SE" ] } ], "avalancheProblems": [ { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "wind_drifted_snow" }, { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "cornice_failure" } ], "tendency": { "validTime": {} }, "bulletinID": "GB-SCT-10175", "publicationTime": "2022-02-24T00:00:00", "avalancheActivityHighlights": "NC for 25/2. Dry and cool. Windslab on sheltered N through E to SE aspects above 800m. Fragile cornices. Considerable hazard. ", "avalancheActivityComment": "Forecast Snow Stability: Unstable windslab will be present on many wind sheltered locations on mainly North through East to South-East aspects above 800 metres. Cornices above these aspects will be fragile. Below 800 metres there will be localised accumulations of windslab, but these will be more stable. Exposed windward aspects will be generally scoured, icy and stable. The avalanche hazard will be Considerable. ", "snowpackStructureComment": "Forecast Weather Influences: Overnight snow showers will die out to leave a day day. Winds will be from a generally Westerly direction. The freezing level will rise from 400 metres early in the morning to around 800 metres by the end of the day. \nObserved Weather Influences: Snow showers and strong Westerly winds through the day. Freezing level around 600 metres. \nObservedSnowStability: Areas of unstable windslab developing on wind sheltered locations above 900 metres on mainly North through East to South-East aspects. Below this level there are areas of windslab, but these tend to be localised and better bonded. Windward slopes are generally scoured and stable. The avalanche hazard is Considerable." }, { "regions": [ { "regionID": "GB-SCT-6" } ], "validTime": { "startTime": "2022-02-24T18:00:00", "endTime": "2022-02-25T18:00:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "800" }, "customData": [], "mainValue": "low", "aspect": [ "SW", "W" ] }, { "elevation": { "lowerBound": "800" }, "customData": [], "mainValue": "moderate", "aspect": [ "S", "NW" ] }, { "elevation": { "lowerBound": "800" }, "customData": [], "mainValue": "considerable", "aspect": [ "N", "NE", "E", "SE" ] }, { "elevation": { "upperBound": "800" }, "customData": [], "mainValue": "low", "aspect": [ "S", "SW", "W", "NW" ] }, { "elevation": { "upperBound": "800" }, "customData": [], "mainValue": "moderate", "aspect": [ "N", "NE", "E", "SE" ] } ], "avalancheProblems": [ { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "wind_drifted_snow" }, { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "cornice_failure" } ], "tendency": { "validTime": {} }, "bulletinID": "GB-SCT-10176", "publicationTime": "2022-02-24T00:00:00", "avalancheActivityHighlights": "CM for 25.2 Unstable windslab mainly on N-E-SE aspects above 800m. Also other aspects and lower. Fragile cornices. Haz Considerable", "avalancheActivityComment": "Forecast Snow Stability: Extensive unstable windslab will be present in wind-sheltered areas, with greatest accumulations on North through East to South-East aspects above 800 metres. Fragile cornice will exist above these aspects. More localised windslab will also be present on other aspects and at lower altitudes. The avalanche hazard will be Considerable.", "snowpackStructureComment": "Forecast Weather Influences: Overnight winds will be Westerly or West-North-Westerly, strong at first then gradually easing to be light during the morning. During the day winds will back South-South-Westerly and strengthen again. Snowfall is expected overnight at all levels, then a dry day. During the day the freezing level will rise from 400 metres to around 700 metres. \nObserved Weather Influences: Winds were strong mainly West-South-Westerly. Snowfall at all levels continued through the day. The freezing level was around 300 metres.\nObservedSnowStability: Fresh unstable windslab continues to be deposited in wind-sheltered areas. Greatest accumulations are on North through East to South-East aspects above 800 metres. Fragile cornices continue to build above these aspects. Windslab is also present on other aspects due to cross loading and on steep slopes at lower altitudes. The surface of the old snowpack is refrozen. The avalanche hazard is Considerable." }, { "regions": [ { "regionID": "GB-SCT-5" } ], "validTime": { "startTime": "2022-02-24T18:00:00", "endTime": "2022-02-25T18:00:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "900" }, "customData": [], "mainValue": "low", "aspect": [ "SW", "W", "NW" ] }, { "elevation": { "lowerBound": "900" }, "customData": [], "mainValue": "moderate", "aspect": [ "N", "S" ] }, { "elevation": { "lowerBound": "900" }, "customData": [], "mainValue": "considerable", "aspect": [ "NE", "E", "SE" ] }, { "elevation": { "upperBound": "900" }, "customData": [], "mainValue": "low", "aspect": [ "S", "SW", "W", "NW" ] }, { "elevation": { "upperBound": "900" }, "customData": [], "mainValue": "moderate", "aspect": [ "N", "NE", "E", "SE" ] } ], "avalancheProblems": [ { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "wind_drifted_snow" }, { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "cornice_failure" } ], "tendency": { "validTime": {} }, "bulletinID": "GB-SCT-10177", "publicationTime": "2022-02-24T00:00:00", "avalancheActivityHighlights": "SC 25.2.22 Unstable windslab in sheltered terrain, mainly NE to SE aspects above 900m, N and S also affected. Ava haz Considerable.", "avalancheActivityComment": "Forecast Snow Stability: Moderately to weakly bonded windslab will persist in steep wind sheltered locations mainly on North-East to South-East aspects above 900 metres. Moderately bonded deposits will also be present on North and South aspects and in other lee locations at lower altitudes. Newly formed cornices will remain fragile. Areas exposed to recent strong winds will be firm and stable. The avalanche hazard will be Considerable.", "snowpackStructureComment": "Forecast Weather Influences: Overnight snow showers down to the glens will fall on very strong winds, initially Westerly but becoming North-Westerly. By dawn, showers will die out and winds will ease. During the day the 500 metre freezing level will rise to 600 metres.\nObserved Weather Influences: Snow showers fell to all levels but eased mid morning. Much colder than of late with a temperature of -6 degrees celsius recorded at 930 metres. Winds were very strong, South-West becoming Westerly early afternoon. \nObservedSnowStability: Moderately to weakly bonded windslab has developed in steep wind sheltered features on North to East aspects above 900 metres. Unstable cornices also continue to develop above these aspects. Pockets of windslab are also found in lee locations on other aspects and at lower altitudes. Windward aspects are windblown and stable. The avalanche hazard is Considerable. " } ] }