Britain is braced for a very chilly weekend as the mercury plummets below freezing across the country.
Some parts of the country will see frosty conditions overnight tonight with some freezing fog developing tomorrow morning - although the dry conditions mean there is little chance of snow.
The UK is currently in the grip of a bitterly cold snap which has seen Public Health England issue a 'level two' alert for 'dangerous' freezing conditions - warning pensioners and vulnerable patients are at risk.
And there may be worse to come following the polar vortex break-up, known as Sudden Stratospheric Warming (SSW), which could lead to another Beast from the East sweeping in before the end of the month.
SSW is where the temperature suddenly rises high up in the stratosphere, between six and 30 miles above the North Pole, and it can result in a chain reaction that leads to very cold conditions from eastern Europe and Russia.
A train travels through rural Bath this morning as temperatures across parts of Britain drop below freezing overnight
A stag today in Glen Muick near Braemar, Aberdeenshire after the coldest night of winter was recorded in the area yesterday
A runner jogs along the bank of the River Cam on a frosty start to the morning in the Granchester area of Cambridge today
Cow Green Reservoir is overflowing with water which dramatically cascades down the dam wall in County Durham today
Bicycles are parked next to narrowboats covered in frost on the Kennet and Avon Canal in Bath this morning
A young stag and deer run through the water of a pond on a cold morning today in Bushy Park, South West London
Frosty weather this morning in Glen Muick, Aberdeenshire, as temperatures fall below freezing in many parts of Britain
Temperatures fell as low as -8C (18F) in Aboyne, Aberdeenshire, this morning - after the coldest night of the winter so far in Scotland early yesterday morning, with Braemar in the same county recording -10.5C (13F).
Met Office forecaster Nicola Maxey said the wintry weather will continue into the weekend, with areas where there are clear skies expected to see the coldest temperatures.
She added: 'We are going to see a fairly cloudy day today, it's a bit grey, fairly dry, with a few sunny spells were we get breaks in the clouds.
'There will be some isolated light showers in the North West and it's going to feel fairly cold, with temperatures for most staying in the low single figures. In the North East, temperatures will be struggling to get over freezing.
The UK is currently in the grip of a bitterly cold snap which has seen daytime temperatures fall close to freezing today
Britain is braced for a chilly weekend as the mercury plummets below freezing - and stays only just above it in the daytime
The forecast for tomorrow shows where snow is likely to be falling over parts of central and eastern Europe this weekend
'London today should be 5C (41F) or 6C (43F). Tonight, we are looking at temperatures dropping below freezing again for many areas. We could potentially see -4C (25F) or -5C (23F) for parts of the country.
What is the polar vortex... and how could its break-up lead to another Beast from the East in Britain?
The polar vortex is a circulation of winds high up in the stratosphere, up to 30 miles (50 km) above the earth.
The winds regularly exceed 155mph, which is the gust strength in the strongest Category 5 hurricanes.
During the winter it can strengthen and weaken – and sometimes it can break down entirely, in an event meterologists call a 'Sudden Stratospheric Warming'.
The polar vortex is a circulation of winds up in the stratosphere
This sees the temperature suddenly rise up in the stratosphere above the North Pole - and it can result in a chain reaction that leads to very cold conditions from eastern Europe and Russia.
An SSW took place last week, which could result in a 'Beast from the East' towards the end of this month.
Met Office deputy chief meteorologist Jason Kelly said: 'Towards the end of January, there is an increased likelihood of a change to much colder weather generally, bringing an enhanced risk of frost, fog and snow.'
The 2018 Beast from the East saw large parts of the UK blanketed in snow, with some public transport grinding to a halt as the cold weather lasted into March.
A man jumps down a snowy hill with his sledge in Rochester, Kent, during the Beast from the East in February 2018
'Where we get the breaks in the cloud for sunshine, we will also get the coldest temperatures at night.'
Ms Maxey said London could see lows of -3C (27F), while Newcastle and Manchester, where it is cloudier, will have minimum temperatures of 1C (34F) or 2C (26F).
Tomorrow is shaping up to be another cloudy, cold day with sunny spells for some and light drizzle in the West, and temperatures likely to peak at around 6C (43F) or 7C (45F).
Sunday will see temperatures increasing slightly, with London and Bristol expected to see highs creep into the double digits as colder air moves away.
But a low-pressure weather system will bring stronger winds to Scotland and the Met Office will issue a yellow weather warning for Monday into Tuesday.
The freezing conditions - caused by a movement of high pressure which has swept in arctic air - prompted Public Health England to issue a cold weather health warning.
The level two alert - the second to be issued this winter - is in place across northern England, Yorkshire and the West Midlands while southern England is covered by a less severe level one alert.
Health bosses have warned that the prolonged freezing conditions could increase health risks to vulnerable patients, as average temperatures stay below 2C (35F) for 48 hours or longer.
Dr Emer O'Connell, public health consultant at Public Health England said: 'Every winter thousands of people die a death that is linked to cold. Those particularly at risk include older people, those with existing ill health, including heart and lung conditions, and young children.
'For the next few days it is really important for us all to keep a look out for the people we know who could be affected, and make sure they get the help and support they need to stay well this winter.
'If you know someone at risk this winter check that they have had their flu jab, that they are heating their home to at least 18C (64F) and that if the weather stops them getting out and about, that they know you can help fetch shopping or prescriptions.
'By thinking of others this winter we can all stay well.'
Deputy Chief Meteorologist Jason Kelly said. 'A sudden stratospheric warming has happened. The warming started around December 22, 2018 and the winds at around 30km (19 miles) above the North Pole have now reversed from westerly to easterly.
'At ground level we know that sudden stratospheric warmings tend to weaken the UK's prevailing mild westerly winds, increasing the chances of us seeing colder weather a couple of weeks after a sudden stratospheric warming.
'However, it's important to note that not all sudden stratospheric warmings lead to colder-than-normal conditions over the UK and there are other global weather factors that result in blocked weather patterns and possible colder weather for us.
'These include El Niño and the Madden-Julian Oscillation that were well signalled in our three-month outlook as early as the end of November.
A woman wraps up against the cold on Westminster Bridge in London today following freezing temperatures overnight
Crowds of people make the most of the sunshine as they walk around Stonehenge in Wiltshire today
A man walks past frosty narrowboats on the Kennet and Avon Canal in Bath today as temperatures fall across the country
A stag in Glen Muick, Aberdeenshire, stands amid the sub-zero temperatures today, which were -6C at the time of capture
Early morning walkers brave the sub-zero weather to enjoy a stroll at West Bay on the Dorset coast - the 'Broadchurch' cliffs
A cyclist rides past two deer at Bushy Park in South West London today on a very crisp Friday morning
A worker cleans pedalos on the Serpentine in London's Hyde Park today as temperatures drop across parts of Britain
A freezing start to the morning in Granchester, near Cambridge, with the River Cam running through frosty meadows today
Early morning walkers make their way along the beach at West Bay on the Dorset coast today
The sun rises above the Pewsey downs, near to Marlborough in Wiltshire, as temperatures across parts of Britain drop
'Certainly, for the first ten days of January there is no strong signal for a cold easterly flow that was associated with the 'Beast from the East' last winter, and it's too early to provide detailed forecasts for what the weather will be like for the remainder of January.
'Our current six to 30 day forecast points to the likelihood of more mobile conditions before the arrival of anything that might potentially be colder.
'Towards the end of January, however, there is an increased likelihood of a change to much colder weather generally, bringing an enhanced risk of frost, fog and snow.'
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https://hienalouca.com/2019/01/04/uk-weather-britain-braces-for-chilly-weekend-as-jack-frost-bites/
Main photo article Britain is braced for a very chilly weekend as the mercury plummets below freezing across the country.
Some parts of the country will see frosty conditions overnight tonight with some freezing fog developing tomorrow morning – although the dry conditions mean there is little chance of...
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Dianne Reeves Online news HienaLouca
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