{ "bulletins": [ { "regions": [ { "regionID": "GB-SCT-4" } ], "validTime": { "startTime": "2022-02-05T18:00:00", "endTime": "2022-02-06T18:00:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "800" }, "customData": [], "mainValue": "low", "aspect": [ "S", "SW", "W", "NW" ] }, { "elevation": { "lowerBound": "800" }, "customData": [], "mainValue": "moderate", "aspect": [ "N", "NE", "E", "SE" ] }, { "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-10058", "publicationTime": "2022-02-05T00:00:00", "avalancheActivityHighlights": "GC 6.2 Poorly bonded windslab on N through E to SE aspects above 800m esp. coire rims and gully tops. Cornices! Av Haz Moderate.", "avalancheActivityComment": "Forecast Snow Stability: Poorly bonded windslab will continue to accumulate throughout the forecast period on mainly North through East to South-East aspects above 800 metres. Steep wind sheltered locations such as coire rims, gully tops and ridge flanks will be particularly affected, where deepening drifts will contain instabilities. New cornices will be fragile and prone to collapse. Outwith these locations new snow will lie on bare ground; wind exposed slopes will be icy. The avalanche hazard will be Moderate.", "snowpackStructureComment": "Forecast Weather Influences: The freezing level will be around 300 metres. Snow is expected above 200 metres for the duration of the forecast period. Winds will be gale force and mainly from the West, veering West-North-Westerly in the afternoon. \nObserved Weather Influences: A day of blustery showers falling initially as rain followed later by sleet and snow. The freezing level gradually lowered from 900 metres to 200 metres by the end of the day. Winds were gale force and mainly West-South-Westerly veering Westerly in the afternoon. \nObservedSnowStability: Poorly bonded windslab continued to accumulate through the day on North through East to South-East aspects above 850 metres. Windslab instabilities are greatest where accumulations have achieved depth, most particularly in steep wind sheltered locations such as coire rims, scarp slopes and ridge flanks. Outwith these locations superficial thawing snow lies above 350 metres. The avalanche hazard is Moderate." }, { "regions": [ { "regionID": "GB-SCT-3" } ], "validTime": { "startTime": "2022-02-05T18:00:00", "endTime": "2022-02-06T18:00:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "1000" }, "customData": [], "mainValue": "considerable", "aspect": [ "N", "NE", "E", "SE" ] }, { "elevation": { "lowerBound": "1000" }, "customData": [], "mainValue": "low", "aspect": [ "S", "SW", "W", "NW" ] }, { "elevation": { "upperBound": "1000" }, "customData": [], "mainValue": "low", "aspect": [ "S", "SW", "W", "NW" ] }, { "elevation": { "upperBound": "1000" }, "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-10059", "publicationTime": "2022-02-05T00:00:00", "avalancheActivityHighlights": "LO for 06.02. Instabilities on N through E to SE aspects above 800m. Fragile cornices developing. Avalanche Hazard Considerable.", "avalancheActivityComment": "Forecast Snow Stability: Areas of poorly bonded windslab will be present above 1000 metres on North through East to South-East aspects, notably around corrie rims and gully tops. Fragile cornices will also continue to build above these aspects. Between 800 and 1000 metres, localised accumulations of windslab are expected to form in wind sheltered locations on the same aspects. Wind scoured slopes will be frozen and stable. The avalanche hazard will be Considerable.", "snowpackStructureComment": "Forecast Weather Influences: Gale to severe Gale Force Westerly winds with frequent snow showers throughout the period. The freezing level will be around 400m.\nObserved Weather Influences: Storm Force Westerly winds. Frequent showers falling as snow above 1000m. The freezing level rose to around 1000m by mid-morning, then slowly began to drop. At 1400hrs the air temperature had dropped to -2.6 degrees at 1200m.\nObservedSnowStability: Unstable windslab is present on North through East to South-East aspects above 1000m. Greatest accumulations are in gullies and other wind sheltered locations. Cornices continue to build above these aspects. Below 1000m a significant thaw was in progress. The avalanche hazard is Considerable." }, { "regions": [ { "regionID": "GB-SCT-7" } ], "validTime": { "startTime": "2022-02-05T18:00:00", "endTime": "2022-02-06T18:00:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "750" }, "customData": [], "mainValue": "considerable", "aspect": [ "NE", "E", "SE" ] }, { "elevation": { "lowerBound": "750" }, "customData": [], "mainValue": "low", "aspect": [ "SW", "W", "NW" ] }, { "elevation": { "lowerBound": "750" }, "customData": [], "mainValue": "moderate", "aspect": [ "N", "S" ] }, { "elevation": { "upperBound": "750" }, "customData": [], "mainValue": "low", "aspect": [ "N", "S", "SW", "W", "NW" ] }, { "elevation": { "upperBound": "750" }, "customData": [], "mainValue": "moderate", "aspect": [ "NE", "E", "SE" ] } ], "avalancheProblems": [ { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "wind_drifted_snow" }, { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "cornice_failure" } ], "tendency": { "validTime": {} }, "bulletinID": "GB-SCT-10060", "publicationTime": "2022-02-05T00:00:00", "avalancheActivityHighlights": "TO for 6/2. Windslab developing and gaining depth on NE to SE above 750m. Also N and S and lower elevations. Considerable hazard.", "avalancheActivityComment": "Forecast Snow Stability: Windslab will continue to develop and gain depth in wind sheltered locations, such as gullies, corrie rims and ridge flanks. Greatest accumulations will be on North-East to South-East aspects above 750 metres with more localised accumulations at lower elevations. North and South aspects above 750 metres will also be affected due to cross loading. Cornices will develop above all of these aspects. Windward slopes will generally be scoured and stable. The avalanche hazard will be Considerable.", "snowpackStructureComment": "Forecast Weather Influences: Constant showers throughout the forecast period will fall as snow at most levels. The freezing level will be around 300 metres. Very strong Westerly winds.\nObserved Weather Influences: Constant heavy precipitation in the morning fell as rain at most levels. Showers followed gradually turning to snow above 300 metres. The freezing level was around summit level in the morning lowering to around 300 metres by the end of the afternoon. Very strong Westerly winds. \nObservedSnowStability: Fresh unstable windslab has started to develop in wind sheltered locations such as corrie rims and gullies, with North-East to South-East aspects above 750 metres most affected. Isolated deposits of windslab are also developing on North and South aspects due to cross loading. Elsewhere the existing snowpack is thawing and consolidating. The avalanche hazard is Moderate." }, { "regions": [ { "regionID": "GB-SCT-6" } ], "validTime": { "startTime": "2022-02-05T18:00:00", "endTime": "2022-02-06T18:00:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "800" }, "customData": [], "mainValue": "considerable", "aspect": [ "N", "NE", "E", "SE" ] }, { "elevation": { "lowerBound": "800" }, "customData": [], "mainValue": "low", "aspect": [ "S", "SW", "W", "NW" ] }, { "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-10061", "publicationTime": "2022-02-05T00:00:00", "avalancheActivityHighlights": "CM for 06/02/22 New snow instabilities, windslab deposits above 800m on NE through E to SE aspects. Avalanche Hazard Considerable. ", "avalancheActivityComment": "Forecast Snow Stability: Unstable windslab will be deposited in wind sheltered areas. Greatest accumulations will be on North through East to South-East aspects above 800 metres. Below 800 metres, localised unstable windslab will also accumulate in wind sheltered locations. Fragile cornices will continue to build above the same aspects. The avalanche hazard will be Considerable.", "snowpackStructureComment": "Forecast Weather Influences: There will be a return to cooler conditions with the Freeing Level lowering to around 200 metres accompanied by snow showers throughout the forecast period. The strong West-South-West air flow will persist, becoming West, then West-North-West by the end of the day.\nObserved Weather Influences: The freezing level has fluctuated with wintry snow showers overnight. These persisted for much of the day, with rain below 700 metres. Cooler conditions are beginning to affect the area towards the end of the day with snow falling once again to lower levels below 700 metres. The winds have been strong mostly West-South-Westerly.\nObservedSnowStability: New snow instabilities with areas of unstable windslab exist above 800 metres. The areas affected are steep corrie rims, headwalls, gully tops, and high wind sheltered locations on North East through East to South East aspects. Below 700 metres the recent accumulations have consolidated rapidly and although now wet, are stable. The avalanche hazard is Considerable." }, { "regions": [ { "regionID": "GB-SCT-5" } ], "validTime": { "startTime": "2022-02-05T18:00:00", "endTime": "2022-02-06T18:00:00" }, "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-10062", "publicationTime": "2022-02-05T00:00:00", "avalancheActivityHighlights": "SC 06.02 Unstable windslab on N through E to S aspects above 800m. Fragile cornices. Avalanche hazard Moderate.", "avalancheActivityComment": "Forecast Snow Stability: Windslab will continue to form in wind sheltered locations on mainly North-East to South-East aspects above 800 metres, with some cross-loading on North and South aspects also occurring. Both depth and distribution will become more widespread as the day progresses, with steeper features such as gullies, burn lines and corrie rims particularly affected. Fragile cornices will begin to form on these aspects. The avalanche hazard will be Moderate.", "snowpackStructureComment": "Forecast Weather Influences: Light snowfall throughout the period. Gale force, generally Westerly winds, veering North-Westerly at the end of the afternoon. 350 to 400 metre freezing level.\nObserved Weather Influences: Precipitation falling as snow, initially above 600 metres, then late morning above 800 metres. Gale force West-South-Westerly winds. Freezing level rose to 900 metres during the early afternoon. \nObservedSnowStability: Snow showers and drifting have formed localised accumulations of unstable windslab in wind sheltered locations on North through East to South-East aspects above 900 metres. Steep, sharply defined features such as gully tops, burn lines and corrie rims are holding deepest amounts, but depth and distribution are both fairly limited at present. Elsewhere there is a cosmetic covering of new snow with exposed locations wind scoured. The avalanche hazard is Moderate." }, { "regions": [ { "regionID": "GB-SCT-2" } ], "validTime": { "startTime": "2022-02-05T18:00:00", "endTime": "2022-02-06T18:00:00" }, "source": {}, "dangerRatings": [ { "elevation": { "lowerBound": "900" }, "customData": [], "mainValue": "considerable", "aspect": [ "NE", "E", "SE" ] }, { "elevation": { "lowerBound": "900" }, "customData": [], "mainValue": "low", "aspect": [ "S", "SW", "W", "NW" ] }, { "elevation": { "lowerBound": "900" }, "customData": [], "mainValue": "moderate", "aspect": [ "N" ] }, { "elevation": { "upperBound": "900" }, "customData": [], "mainValue": "low", "aspect": [ "N", "S", "SW", "W", "NW" ] }, { "elevation": { "upperBound": "900" }, "customData": [], "mainValue": "moderate", "aspect": [ "NE", "E", "SE" ] } ], "avalancheProblems": [ { "dangerRating": { "elevation": {}, "customData": [] }, "problemType": "wind_drifted_snow" } ], "tendency": { "validTime": {} }, "bulletinID": "GB-SCT-10063", "publicationTime": "2022-02-05T00:00:00", "avalancheActivityHighlights": "NC for 6/2. Snow Showers. Unstable windslab on sheltered NE to SE aspects above 900m. Elsewhere scoured. Considerable hazard. ", "avalancheActivityComment": "Forecast Snow Stability: Through the period windslab will continue to be deposited on North-East to South-East aspects above 900 metres with some cross-loading affecting North aspects. Although these areas of windslab will not be particularly extensive, they are expected to be poorly bonded. Below this altitude localised shallow accumulations will form. On other aspects the snowpack will tend to be very shallow. The avalanche hazard will be Considerable.", "snowpackStructureComment": "Forecast Weather Influences: Snow showers will continue overnight and through the day. Strong Westerly winds. The freezing level will be around 400 metres. \nObserved Weather Influences: It was a showery day with snow falling above 800 metres. The freezing was around 1000 metres through much of the day. Strong Westerly winds. \nObservedSnowStability: Areas of moderately bonded windslab have been deposited in wind sheltered locations on North-East to South-East aspects above 1000 metres. In general these areas are not particularly deep or extensive. Below 1000 metres the snowpack is wet and stability has improved. On other aspects the snowpack tends to be very shallow. The avalanche hazard is Moderate." } ] }