<sod >'Snownado': Skiers and walkers were dwarfed on Cairngorm Mountain near Aviemore by the stunning spiralling pillar of snow  The phenomenon seen in Scotland typically forms when a cold air mass passes over a warmer surface, heated by sunlight James Madden, of Exacta Weather, said eastern and south-eastern parts will be the first to see wintry showers as temperatures drop.< eod>< sod > 'Snownado': Skiers and walkers were dwarfed on Cairngorm Mountain near Aviemore by the stunning spiralling pillar of snow  The phenomenon seen in Scotland typically forms when a cold air mass passes over a warmer surface, heated by sunlight  Up to two inches of snow was expected to fall over Scotland yesterday - while there will be more flurries of the white stuff towards the end of the week, particularly in the East, where it might be cold enough to accumulate.< eod>