The alert will run for 24 hours from midday, covering Grampian, the Highlands, Orkney & Shetland, Dumfries & Galloway and across Ayrshire.

Scotland is continuing to be hit by freezing weather, with rain, sleet and snow expected to fall across large parts of the country. Temperatures at Loch Glascarnoch in the Highlands fell to -11C on Saturday night after forecasters extended a yellow warning from 09:00 on Sunday until 12:00 on Monday.

Between train disruption, school closures, and delayed or axed flights, Scotland remains in the midst of weather chaos

Forecasters warn of difficult driving conditions as workers and school pupils return after the Christmas break.