The United Kingdom is bracing for a 21-hour snowstorm, expected to commence with the first snowflakes falling in Scotland during the early hours of December 15. The snow is then projected to move southward, affecting Northern Ireland, Wales, and parts of northern England. By 9 am, the most intense snowfall is anticipated in southern Scotland’s Galloway Forest Park, as well as the Lake District and the Pennines in northern England.
Northern Ireland is likely to experience a lighter dusting of snow around the same time. Snowfall is forecasted for North Wales, particularly Snowdonia, by 3 pm on December 15. Additionally, snow showers are expected in Ireland, with Dublin possibly receiving some snowflakes.
As the weather system progresses across the UK, regions that escape the snowfall can expect rainfall instead. Central and northern England are predicted to face heavy rain throughout the day. Snow coverage maps for 9 pm on December 15 illustrate the extent of the incoming snowfall.
After 21 hours of snow showers, snow accumulation is anticipated in North Wales, Northern Ireland, northern parts of England including west and North Yorkshire, and most of Scotland. The BBC Weather forecast from December 15 to 28 indicates low confidence for the latter part of December due to disturbances in the upper atmosphere affecting weather patterns.
The Met Office has also highlighted the potential for snow in certain UK regions during the latter half of December. Their outlook from December 16 to 30 suggests a higher chance of dry weather with sporadic rain, showers, and hill snow, especially in the north. Overall, temperatures are expected to be around or slightly above average, with the possibility of colder spells during settled periods.