Much of the UK could be blanketed in up to 15cm of snow over today and tomorrow as temperatures plummet far below freezing.
More warnings have been issued for severe cold weather and ice until Tuesday, with the elderly and anyone with underlying health conditions being urged to keep warm indoors.
Carrbridge, in the Scottish Highlands, is due to see temperatures of -6C over the next 24 hours as one of the coldest places in Britain.
Even southern England is seeing the mercury dip below freezing, with Reading in Berkshire expecting -2C, as well as Aylesbury in Buckinghamshire.
The warmest places in the country, according to Met Office predictions, will be the Isles of Scilly and Newquay in Cornwall, basking in a relatively balmy 8C.
A spokesperson for the Met Office said: “There is a 90 per cent probability of severe cold weather and icy conditions until noon on Monday in parts of England. This weather could increase the health risks to vulnerable patients and disrupt the delivery of services.
"Increasingly cold air will spread from the North West across England on Thursday night and during Friday, with showers turning more wintry from the north.
“Average temperatures are expected to continue falling through the weekend, with a northerly airstream likely to be established by Sunday.
"Frost and ice are expected to become increasingly widespread through the period, with some severe overnight frosts likely in the north over any snow cover by Monday."
Yellow weather warnings for snow and ice have been issued for Scotland, Northern Ireland and the North West of England today. They are being expanded to cover the whole of the UK except for parts of the South East on Saturday.
The deepest snowfall is expected at altitudes above 300m in Scotland, where between 10cm and 15cm could fall within hours, creating the risk of travel disruption. Lower ground across the country will see between 2cm and 6cm.
Parts of the Highlands saw up to 5ft of snow on Thursday night, stranding motorists on the A9.
“Showers could fall as snow anywhere in the country,” a forecaster at the Met Office said. “Certainly further north and higher altitudes could see some snow.”
High winds in "Storm Rachel" that wreaked havoc in recent days are easing after a man was killed when a tree fell on his car in County Antrim.
UK winter weather
UK winter weather
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Cars make their way through the snow in the Loxley area of Sheffield
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A cyclist makes his way through a blizzard in Durham
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Heavy snow falls on the A690 into Durham
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Picture of snow taken through a window of a plane stuck at Manchester Airport
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A woman walks in heavy snow in the Loxley area of Sheffield
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Heavy snow in the Loxley area of Sheffield
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A snow covered Durham Cathedral
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Snow covered graves at St Joseph's Church in west Belfast, as an orange weather alert is announced in Northern Ireland
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Sheep in snow, in the Glens of Antrim, as an orange weather alert is announced in Northern Ireland
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Snow Blizzards on the A9 road near Blackford, Perthshire as snow blizzards sweep across the country
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A cyclist on Dumbarton Road in Stirling during a snow blizzard
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A dog walker walks through the Kings Knot area below Stirling Castle during a snow blizzard
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Vehicles driving down Dumbarton Road in Stirling during a snow blizzard
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Scotrail train travels through snow covered country side near Lenzie, Scotland
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A man digs his car out of the snow near Shaw, northern England
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A dog walker in the snow on the Pennine hilltops near Reeth in the Yorkshire Dales, as many parts of the UK were on snow alert with wintry showers threatening to disrupt travel
John Giles/PA Wire
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A snow plough on the A93 near Guildtown, as snow brings fresh disruption to parts of the UK
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Andrew Millington (left) and Stephen Peacock walk near the Spittal of Glenshee as snow brings fresh disruption to parts of the UK
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Snow covers the A68 near Corbridge in Northumberland, as many parts of the UK were on snow alert with wintry showers threatening to disrupt travel
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A car makes its way through snowfall in Gortin near Omagh, as many parts of the UK were on snow alert with wintry showers threatening to disrupt travel
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Sleaford Lincolnshire in the snow Boxing Day 2014
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Snow at Liverpool's John Lennon Airport, which closed temporarily on Friday night
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Maisy Byrne, aged nine, (left) and sister Lulu Byrne, aged seven, have fun as snow falls on Boxing Day in Gateacre, Liverpool
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A decorative snowman surrounded by real snow outside a house in Eccleston Park, near Prescot, Merseyside
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Maisy Byrne, 9, left, and sister Lulu Byrne, 7, have fun as snow falls in Gateacre, Liverpool
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Snowfall in Uttoxeter, Staffordshire on Boxing Day
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A man pushing a motorcycle through snow in Newtown Linford, Leicestershire on Boxing Day
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On the M6 near Sandbach
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Snow swirling around the grounds of Lichfield Cathedral on Boxing Day
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Referee Mark Clattenburg during the Premier League football match between Manchester City and West Bromwich Albion at The Hawthorns in the Midlands
A 96mph gust of was recorded on Wednesday night in Capel Curig, Wales, and 93mph gusts battered the Needles on the Isle of Wight.
The gales were accompanied by torrential rain in parts of the UK, with more than 40mm falling in less than 12 hours in Achnagart in the Scottish Highlands.
Dr Angie Bone, from Public Health England’s extreme events team, said: “Cold does kill, even in places where the temperatures aren't at their lowest. Most of our advice on keeping warm in cold weather may seem like common sense, but it's important that we make the point that people should think about how cold can affect them.”
Additional reporting by PA
Coldest places in the UK on Friday
- Carrbridge, Scottish Highlands, -5°C
- Stansted, Kent, -2°C
- Newtown, Powys, -2°C
- Histon, Cambridgeshire, -1°C
- Stafford, Staffordshire, -1°C
Warmest places in the UK on Friday
- Isles of Scilly Airport, Cornwall, 9°C
- Portreath, Cornwall, 7°C
- Tunbridge Wells, Kent, 5°C
- Kimbolton, Cambridgeshire, 5°C
- Boulmer, Northumberland, 5°C
Figures from the Met Office, collated by the BBCReuse content