Southern Cairngorms

03.01.23 SC Unstable windslab developing on W through N to E aspect above 900m. Cornice collapse possible Avalanche haz Considerable

03.01.23 SC Unstable windslab developing on W through N to E aspect above 900m. Cornice collapse possible Avalanche haz Considerable

Forecast Snow Stability: Unstable windslab will develop mainly above 900 metres in wind sheltered locations on North-West to North-East aspects. West and East aspects will also be affected by localised new accumulations. Stability will be poorest in the afternoon as the freezing level rise with corrie rims, steep scarp slopes and gully exits affected. Cornices will be prone to collapse. Elsewhere localised moderately bonded deposits will also be found in steep lee locations. The avalanche hazard will be Considerable.

Forecast Weather Influences: Remaining cold overnight with precipitation from dawn. This will fall initially as snow above 600 metres but will turn to rain at all levels as the freezing level rises throughout the day. Winds likely to be very strong in the morning from the South to South-South-East. Observed Weather Influences: A cold and dry day. Winds were strong from the West, easing slightly by early afternoon. ObservedSnowStability: There is a covering of soft snow at all levels. Although it was dry there was significant drifting of existing deposits above 600 metres. Moderately bonded deposits are present mainly on North-West through North to East aspects. Greatest hazard was around wind sheltered corrie rims and gully tops above 900 metres. Exposed old snow is very firm. The avalanche hazard is Moderate.