The arrival of much colder air across the United Kingdom will set the stage for some areas to have their first snowfall of the year late this week.
The colder air spread into Northern Ireland, Scotland and Northern England on Wednesday and will overtake all of the U.K. by Thursday.
Following a high temperature of 10 C (50 F) in London on Wednesday, temperatures will only reach 5-6 C (41-43 F) on Thursday. The normal high in London in mid-January is 6 C (43 F).
Enough cold air is in place for snow showers to stream onto the eastern coast of the U.K. on Thursday.
A storm arriving from the Atlantic will interact with the colder air and result in snow falling across much of Scotland throughout the day on Friday.
Snow will fall all the way into the lower elevations, including Glasgow and Edinburgh. Accumulations on non-paved surfaces are expected with a slushy coating on roadways during the heaviest snowfall Friday afternoon into Friday night.
Snow will spread into the higher terrain of Northern England late in the day into Friday night, bringing minor accumulations.
A few wet snowflakes can also mix with rain across the higher terrain of northern Wales late Friday into Friday night.
Elsewhere, precipitation is expected to fall as a cold rain across the U.K. from Friday into Friday night.
The steadiest rainfall on Friday will be across Northern Ireland and western Scotland during the morning before spreading into Wales, Southwest England and the Midlands during the afternoon.
Greater London is expected to remain dry through the evening commute, with rain arriving for the overnight hours.
A cold and largely dry weekend will follow across the U.K. The most likely areas to experience a brief shower include the east coast of Scotland and England as well as Northern Ireland.
Cold weather will continue into next week as another storm brings the risk of rain and high-elevation snow to much of the U.K.