NORTHERN CAIRNGORMS AVALANCHE HAZARD 1500 HRS WED 4/2/98 Strong W winds and snow showers have loaded most steep E to SE aspects at or above 1050m with poorly stabilised windslab. The new slab is hard and deep in places and overlies a soft, weak layer that contains some facetted crystals. Considerable (Category 3) hazard of avalanche in these locations. Avalanche triggered in Ciste Mhearad at 1245hrs. AVALANCHE HAZARD OUTLOOK THU 5/2/98 Some light snow showers, turning to rain, on W then SW winds will load E to SE-facing slopes and gullies with additional windslab for a time. Pockets of new slab are also possible on NE aspects. Avalanches are likely in these locations with the onset of rain and milder temperatures. Steep E to SE aspects overhung by new cornices will be exposed to high loading in the event of cornice collapse. Considerable (Category 3) hazard of avalanche. CLIMBING CONDITIONS SNOW DISTRIBUTION: Heavy drifting in the most sheltered locations on Weds.. Wind-exposed areas icy. ICING: Remains variable. Good but heavily used snow/ice in popular gullies. COMMENT: Milder on Thursday LOCHABER AVALANCHE HAZARD 1500 HRS WED 4/2/98 Heavy snow and strong Westerly winds have continued to load sheltered areas with fresh snow. This snow has formed as unstable windslab and is poorly bonded to the underlying snow layers. Main accumulations exist at the tops of NE, E and SE facing slopes and gullies above 900m. In these locations the avalanche hazard is High (Category 4). Soft unstable cornices are present above these aspects. AVALANCHE HAZARD OUTLOOK THU 5/2/98 Thaw conditions to around the summits will introduce wet snow instabilities within the snowpack. This will maintain a high avalanche hazard as wet snow avalanches will occur on slopes and gullies with a NE, E and SE slope aspect. Highest hazard will be in sheltered locations above 900m, where accumulations of fresh snow are greatest, especially the main gullies on Ben Nevis. The avalanche hazard will be High (Category 4). Cornices will thaw and be prone to collapse. CLIMBING CONDITIONS SNOW DISTRIBUTION: Fresh snow falling above 600m, although thaw conditions expected. ICING: Freezing level rising to around summit levels. COMMENT: Hazard of ice and rock fall as thaw sets in. Main gullies on Ben Nevis hazardous, due to wet snow avalanches. GLENCOE AVALANCHE HAZARD 1500 HRS WED 4/2/98 New snow above 850m and strong SW winds are forming areas of windslab in sheltered locations and on slopes mainly of an NE to SE aspect above 900m, these deposits are weakly bonded where deeper accumulations exist. The avalanche hazard is Considerable (Category 3). AVALANCHE HAZARD OUTLOOK THU 5/2/98 Milder conditions with light rain at all levels will soften and moisten the snowpack The avalanche hazard will be Considerable (Category 3) in sheltered gullies and on slopes with a NE to SE aspect above 900m where deeper windslab exists. Avalanches are likely in these areas. Unstable cornices above NE to SE slopes. CLIMBING CONDITIONS SNOW DISTRIBUTION: Snow above 800m. ICING: Ice on rocks and paths above 800m. COMMENT:Climbing conditions will deteriorate with mild windy weather for next few days. SOUTHERN CAIRNGORMS AVALANCHE HAZARD 1500 HRS WED 4/2/98. Persisting cold weather and strong W winds have continued the windslab build up mainly on E aspects. Some localised deposits also exist on sheltered N gullies. The deposits are only moderately to weakly bonded to existing snow ice on steep slopes above 850m. The avalanche hazard is Considerable (Category 3). Elsewhere strong winds have scoured the snowpack leaving it icy. AVALANCHE HAZARD OUTLOOK THU 5/2/98. A steady thaw throughout the period will begin to stabilise the snowpack. Although the areas of weakly bonded snow on steep sheltered N gullies and E aspects above 850m will still be of concern, especially where exposed to potential high loading from unstable cornices. The avalanche hazard will be Considerable (Category 3). CLIMBING CONDITIONS SNOW DISTRIBUTION: Patchy, with most deposits in N to E facing corries and sheltered areas above 900m. ICING: Generally lean, and subject to thaw. COMMENT: Buttresses holding snow and turf mostly frozen, at the moment.........! CREAG MEAGAIDH AVALANCHE HAZARD 1500 HRS WED 4/2/98 Driving snow on a gale force Westerly wind has led to considerable accumulations of unstable windslab. Sheltered gullies, slopes and hollows facing NNE to SSE above 900m are the areas of greatest hazard. The avalanche hazard is Considerable (Category 3). AVALANCHE HAZARD OUTLOOK THU 5/2/98 Drier conditions overnight followed by rain tomorrow, with continuing very strong W winds, will bring a slow thaw to all levels. Unstable wet slab will exist in gullies and on slopes facing NNE to SSE above 900m. The avalanche hazard will be Considerable (Category 3). CLIMBING CONDITIONS SNOW DISTRIBUTION: Reasonable cover above 850m, but this will rise tomorrow (5/2/98). ICING: Still building, but will diminish during the thaw. COMMENT: Particularly unpleasant atmospheric conditions on the hills today. Lets hope the forthcoming thaw will not last too long. -------------------------------------------------------------------------------