Arctic air has gripped the United Kingdom, driving temperatures sharply lower and prompting widespread weather warnings across Scotland and northern England.
The Met Office has issued multiple yellow alerts for snow and ice through Tuesday, with further warnings extending into Thursday as conditions deteriorate.
November, which began with unusually mild weather, has flipped dramatically.
Temperatures now sit 3-6C below the mid-November average as a potent northerly wind drags in freezing air from the Arctic.
The UK Health Security Agency (UKHSA) has issued yellow and amber cold-health alerts for northern England and the Midlands, in force until Friday. The agency warns the cold may pose “significant” risks to vulnerable people and could increase pressure on health and social care services.
Snowfall is set to intensify across northern and eastern Scotland from early Tuesday, with 5-10cm expected over higher ground above 400m. Lower levels may also see 2-5cm, potentially making some routes impassable and causing disruption to rail travel.
Further south, hill snow is possible across the North Pennines and the North York Moors.
Ice remains a key hazard, with separate warnings for northern and eastern Scotland and for central Scotland stretching into northern England on Tuesday morning.
Conditions are forecast to worsen midweek as frequent, heavy snow showers sweep into northern Scotland. A renewed warning for snow and ice will run from Tuesday evening to Thursday night, with 15-20cm possible above 300m and strong winds increasing the risk of blizzard-like conditions.
Eastern England will also face snow showers on Wednesday and Thursday as a brisk northerly wind drives showers inland from the North Sea. Some areas could accumulate 2-5cm at low levels, while higher ground may see up to 20cm.
The Met Office has warned of the possibility of “thundersnow” in areas hit by intense showers. As temperatures fall below freezing overnight, treacherous ice is expected to form widely.
By Wednesday, daytime temperatures will linger between 2-5C but feel as low as -4C due to the wind chill. Thursday night is forecast to be the coldest of the week, with rural Scotland plunging to -12C.
A gradual change will begin late on Friday as an Atlantic weather system introduces milder, cloudier conditions. While temperatures will rise towards seasonal averages by Saturday, much of the UK will endure several days of biting cold before the shift arrives.
