{ "bulletins": [ { "regions": [ { "regionID": "GB-SCT-2" } ], "validTime": { "startTime": "2022-01-07T18:00:00", "endTime": "2022-01-08T18:00:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "800" }, "customData": [], "mainValue": "moderate", "aspect": [ "SE", "W" ] }, { "elevation": { "lowerBound": "800" }, "customData": [], "mainValue": "low", "aspect": [ "S", "SW" ] }, { "elevation": { "lowerBound": "800" }, "customData": [], "mainValue": "considerable", "aspect": [ "N", "NE", "E", "NW" ] }, { "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-9884", "publicationTime": "2022-01-07T00:00:00", "avalancheActivityHighlights": "NC for 8/1, weak windslab on mainly NW,N,NE,E abv 800m also W and SE. Cornices, Consolidating at lower levels. Considerable hazard.", "avalancheActivityComment": "Forecast Snow Stability: Continued development of very weakly bonded windslab in steep wind sheltered locations. Greatest accumulations, will be on North-West through North to East aspects above 800m, with coire rims, gullies and crag aprons most affected. West and South-East aspects will also be affected due to cross loading. Fragile cornices will continue to develop above all these aspects. Isolated instabilities at lower elevations will gradually consolidate during the day. The avalanche hazard will be Considerable.", "snowpackStructureComment": "Forecast Weather Influences: Pre dawn snow showers will turn to rain below 800 metres then will clear by mid morning to leave a cloudy, dry remainder of the day. The freezing level will rise from around 200 metres to around 800 metres by dawn falling back to 500 metres by the end of the day. Moderate South-Westerly winds will back Southerly and increase in strength to very strong for a period in the early morning gradually decreasing to moderate and backing West-South-West by midday. \nObserved Weather Influences: A dry cloudy day with moderate to strong Westerly winds. It was freezing at most levels with a midday summit temperature of -6 degrees Celsius. \nObservedSnowStability: Drifting snow is leading to continued development of unstable windslab in steep wind sheltered locations such as corrie rims and gully exits.Greatest accumulations are on North-West through North to East aspects above 800 metres, West and South East aspects are also affected due to crossloading. Cornices above all these aspects are fragile. Isolated instabilities in steep banks at lower elevations above 600 metres remain. The avalanche hazard is Considerable." }, { "regions": [ { "regionID": "GB-SCT-4" } ], "validTime": { "startTime": "2022-01-07T18:00:00", "endTime": "2022-01-08T18:00:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "850" }, "customData": [], "mainValue": "moderate", "aspect": [ "SE", "NW" ] }, { "elevation": { "lowerBound": "850" }, "customData": [], "mainValue": "low", "aspect": [ "S", "SW", "W" ] }, { "elevation": { "lowerBound": "850" }, "customData": [], "mainValue": "considerable", "aspect": [ "N", "NE", "E" ] }, { "elevation": { "upperBound": "850" }, "customData": [], "mainValue": "low", "aspect": [ "N", "NE", "E", "SE", "S", "SW", "W", "NW" ] } ], "avalancheProblems": [ { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "wind_drifted_snow" }, { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "wet_snow" }, { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "cornice_failure" } ], "tendency": { "validTime": {} }, "bulletinID": "GB-SCT-9885", "publicationTime": "2022-01-07T00:00:00", "avalancheActivityHighlights": "GC8/1 Snow showers WSW winds unstable w.slab gullies+NW-N-E slopes 850m+ cornices fragile haz considerable", "avalancheActivityComment": "Forecast Snow Stability: Slopes exposed to the recent strong South-West to Westerly winds will remain scoured in many locations. Unstable windslab will exist in sheltered summit gullies and on slopes with a North-Westerly through North to Easterly aspect mainly above 850 metres, Gully exits and corrie headwalls will be particularly affected. The avalanche hazard will be Considerable. Cornices will be fragile.", "snowpackStructureComment": "Forecast Weather Influences: It will be dry for much of the night with a return to snow showers on Saturday. Daytime winds will be mainly fresh West-South-Westerly. The freezing level will briefly rise above the summits early in the morning then lowering to 500 metres by the end of the day. \nObserved Weather Influences: New snow to most levels and Westerly winds which were strong at times have affected the area overnight and this morning. The freezing level is around 250 metres.\nObservedSnowStability: Unstable windslab has formed in sheltered summit gullies and on slopes with a Northerly to Easterly aspect mainly above 850 metres. Many exposed Westerly slopes have been scoured by wind action. The avalanche hazard is Considerable." }, { "regions": [ { "regionID": "GB-SCT-7" } ], "validTime": { "startTime": "2022-01-07T18:00:00", "endTime": "2022-01-08T18:00:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "750" }, "customData": [], "mainValue": "moderate", "aspect": [ "N", "NE", "E" ] }, { "elevation": { "lowerBound": "750" }, "customData": [], "mainValue": "low", "aspect": [ "SE", "S", "SW", "W", "NW" ] }, { "elevation": { "upperBound": "750" }, "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-9886", "publicationTime": "2022-01-07T00:00:00", "avalancheActivityHighlights": "TOR for 8.1.22. Pockets of unstable windslab persist above 750m. Av Haz Mod.", "avalancheActivityComment": "Forecast Snow Stability: Isolated pockets of unstable windslab will persist on North to East aspects above 750 metres with the tops of gullies most affected. A brief period of increased snowpack instability, with cornice instability also, will occur early in the morning due to rising temperatures before the snow pack refreezes later in the day. Deposits of new snow during the day are not expected to be significant. The avalanche hazard will be Moderate.", "snowpackStructureComment": "Forecast Weather Influences: A dry evening with the freezing level around 300 metres. In the early hours Southerly winds will increase with summit gusts to 70 mph as they veer South-Westerly. The freezing level will rise briefly above the summits before falling to 900 metres by dawn. Showers in the early morning will be wet snow at summit level and rain at lower levels. Showers will progressively turn to snow above 500 metres as the day progresses and the freezing level lowers.\nObserved Weather Influences: Initially dry with bright spells. Occasional heavy showers from late morning falling as snow at all levels. Moderate Westerly winds. Summit temperatures around minus 5c. \nObservedSnowStability: Isolated patches of poorly bonded windslab have accumulated in sheltered locations, predominantly on North to East aspects above 800 metres. Much of the new snow is lying on bare ground. Cornice development observed on Northerly aspect. The avalanche hazard is Moderate." }, { "regions": [ { "regionID": "GB-SCT-6" } ], "validTime": { "startTime": "2022-01-07T18:00:00", "endTime": "2022-01-08T18:00:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "900" }, "customData": [], "mainValue": "moderate", "aspect": [ "SE", "NW" ] }, { "elevation": { "lowerBound": "900" }, "customData": [], "mainValue": "low", "aspect": [ "S", "SW", "W" ] }, { "elevation": { "lowerBound": "900" }, "customData": [], "mainValue": "considerable", "aspect": [ "N", "NE", "E" ] }, { "elevation": { "upperBound": "900" }, "customData": [], "mainValue": "low", "aspect": [ "N", "NE", "E", "SE", "S", "SW", "W", "NW" ] } ], "avalancheProblems": [ { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "wind_drifted_snow" }, { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "wet_snow" }, { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "cornice_failure" } ], "tendency": { "validTime": {} }, "bulletinID": "GB-SCT-9887", "publicationTime": "2022-01-07T00:00:00", "avalancheActivityHighlights": "CM for 08/1/22 Considerable hazard. Early instability N to E aspects above 900m. Weak cornices. ", "avalancheActivityComment": "Forecast Snow Stability: Re-distribution of snow will continue overnight. A Period of poorer stability just before dawn on steep North to East aspects above 900m with the onset of heavier snowfall. Fluctuating temperatures expected to bring only marginal consolidation to old and new windslab on North to South-East aspects above 850m by the end of the day. All recently formed cornices will be of suspect stability throughout the period. The avalanche hazard will be Considerable", "snowpackStructureComment": "Forecast Weather Influences: Dry and cold until just after midnight with light to moderate South-West winds. A pulse of less cold weather for several hours starting in the early hours with stronger South-East winds, snowfall, and rain at lower altitudes. Colder later with easing South-West winds and some light snow showers. \nObserved Weather Influences: Wintry. Cold throughout with persistent overnight and early morning snow showers. Moderate to strong W winds easing later. \nObservedSnowStability: New snow instability in recent windslab mainly on very steep North through East to South-EastE aspects above 900m. New cornice development noted above most of these aspects. Better stability at lower altitudes, less steep ground and all wind scoured slopes. The avalanche hazard is Considerable" }, { "regions": [ { "regionID": "GB-SCT-3" } ], "validTime": { "startTime": "2022-01-07T18:00:00", "endTime": "2022-01-08T18:00:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "900" }, "customData": [], "mainValue": "moderate", "aspect": [ "SE", "W" ] }, { "elevation": { "lowerBound": "900" }, "customData": [], "mainValue": "low", "aspect": [ "S", "SW" ] }, { "elevation": { "lowerBound": "900" }, "customData": [], "mainValue": "considerable", "aspect": [ "N", "NE", "E", "NW" ] }, { "elevation": { "upperBound": "900" }, "customData": [], "mainValue": "moderate", "aspect": [ "N", "NE", "E" ] }, { "elevation": { "upperBound": "900" }, "customData": [], "mainValue": "low", "aspect": [ "SE", "S", "SW", "W", "NW" ] } ], "avalancheProblems": [ { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "wind_drifted_snow" }, { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "wet_snow" }, { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "cornice_failure" } ], "tendency": { "validTime": {} }, "bulletinID": "GB-SCT-9888", "publicationTime": "2022-01-07T00:00:00", "avalancheActivityHighlights": "LO for 8/1/22. Unstable windslab mainly on NW-N-E aspects above 900m. Instability during night below 900m. Considerable hazard.", "avalancheActivityComment": "Forecast Snow Stability: Changing wind directions will result in unstable windslab on many aspects mainly above 900 metres. Greatest accumulations will be on North-West through North to East aspects and fragile cornices will be present above these aspects. There will also be a period of wet snow instability during the latter part of the night mainly on North to East aspects below 900 metres; stability here will improve during the day. The avalanche hazard will be Considerable", "snowpackStructureComment": "Forecast Weather Influences: Moderate South-West winds backing South-South-East and become strong for a time overnight before veering South-Westerly and easing during the day. A dry evening followed by showers, falling as snow only above 900 metres for a period during the night but then to gradually lower levels through the day. The freezing level rises to 1100 metres overnight, then dropping to 600 metres by the end of the period.\nObserved Weather Influences: It was a cold day with snow showers and moderate West-South-Westerly winds\nObservedSnowStability: Areas of moderately and poorly bonded windslab are present in wind sheltered locations. Greatest accumulations are on North to East aspects above 900m. Cornices also forming above these aspects. Aspects exposed to the wind are generally stable. The avalanche hazard is Considerable." }, { "regions": [ { "regionID": "GB-SCT-5" } ], "validTime": { "startTime": "2022-01-07T18:00:00", "endTime": "2022-01-08T18:00:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "900" }, "customData": [], "mainValue": "moderate", "aspect": [ "SE", "NW" ] }, { "elevation": { "lowerBound": "900" }, "customData": [], "mainValue": "low", "aspect": [ "SW", "W" ] }, { "elevation": { "lowerBound": "900" }, "customData": [], "mainValue": "considerable", "aspect": [ "N", "NE", "E" ] }, { "elevation": { "lowerBound": "900" }, "customData": [], "mainValue": null, "aspect": [ "S" ] }, { "elevation": { "upperBound": "900" }, "customData": [], "mainValue": "moderate", "aspect": [ "N", "NE", "E" ] }, { "elevation": { "upperBound": "900" }, "customData": [], "mainValue": "low", "aspect": [ "SE", "S", "SW", "W", "NW" ] } ], "avalancheProblems": [ { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "wind_drifted_snow" }, { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "cornice_failure" } ], "tendency": { "validTime": {} }, "bulletinID": "GB-SCT-9889", "publicationTime": "2022-01-07T00:00:00", "avalancheActivityHighlights": "SC for 08.01.22 Deep unstable windslab mainly on N to E aspects above 900m. Isolated pockets elsewhere Ava haz Considerable.", "avalancheActivityComment": "Forecast Snow Stability: Unstable windslab will continue to develop, mainly on North to East aspects above 900 metres. Gully tops and corrie rims will be most affected. Fragile cornices will also continue to develop in these locations. Isolated pockets of unstable windslab may also be encountered in steep sheltered terrain in other locations. Elsewhere, there will be a cover of snow on most aspects. The avalanche hazard will be Considerable.", "snowpackStructureComment": "Forecast Weather Influences: Winds strengthening from the South overnight, strongest around dawn, then easing and veering Westerly during the afternoon. Snow showers moving over the area during the night, potentially heavy. Forecast to be dry during the day. Freezing levels lifting to around 700 metres.\nObserved Weather Influences: Light snow overnight at all levels then dry and bright during the day. Winds strengthening from the West, light drifting from early afternoon.\nObservedSnowStability: There is a covering of snow on most aspects with occasional deep drifts from 600 metres. Areas of unstable windslab persist, mainly on steep sheltered terrain on North-East to South-East aspects above 900 metres with localised instabilities in other locations above 800 metres. The avalanche hazard is Moderate." } ] }