UPDATE: Loch Glascarnoch now at -10.1C as of 9.30pm.

ORIGINAL POST

As the isobars open up so winds turn calm this evening. Widespread clear skies, light winds over fresh snow cover has set the stage for potentially the coldest night of winter for the UK. Ahead of an Atlantic system, temperatures could approach -13 to -15C by sunrise Friday over the North Highlands (Altnaharra, Kinbrace) or eastern Grampian (Braemar) and -8 to -10C in the Borders where there’s good snow cover.

If -15C is achieved, would be the lowest value for the UK since December 2010.

While cold is tonight’s story, our attention turns to snow tomorrow as moisture meets the cold over the UK. Once this moisture penetrates into colder inland parts of the UK, rain should turn readily to snow causing difficult driving.

https://twitter.com/bbcweather/status/946443161869701121

https://twitter.com/bbcweather/status/946439113368104960

https://twitter.com/SimonOKing/status/946335603637080065

https://twitter.com/metoffice/status/946349897695014913

https://twitter.com/metoffice/status/946364197100769281