Met Office amber weather warnings have been issued for snow across Shetland, Orkney and parts of northern mainland Scotland from 1800 on Sunday until 1000 on Monday.
Heavy snowfall over recent days has resulted in over 40cm reported in parts of Moray already.
Strong winds have been causing drifting, with Network Rail Scotland reporting snow drifts up to 1.2m (4ft) on the line between Aberdeen and Dundee.
As the snow showers become heavier and more frequent during Sunday night, the Met Office is warning for the potential of another 20 to 30cm of snow.
Further road and rail closures are also possible and disruption to power is likely in some areas too.
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