SNOW is expected to hit next week as an Arctic eruption sends Britain into chiller, when the polar vortex is “kilter off”.
The fluffy white stuff could drop as early as next Thursday, the Met Office has warned.
John Hammond, a former BBC weatherman and WeatherTranding meteorologist, explained: “There is a slight warming in the stratosphere, which will act to weaken the polar vortex and close it over the next week or two.”
He said it could cause “bouts of cold air blowing from the Arctic” to hit the UK “later in October”.
John said: “After a very mild few days, next weekend there will be a very cold wind from the north, which could bring some snow to the Scottish mountains.
“This cold spell may not last that long, but frost, and eventually snow, will probably come more frequently in our forecasts much earlier.”
It comes as the Met Office confirmed that “snow is expected on mountain tops across Scotland”.
A spokesman said wild weather could turn “sleepy in the snow” and affect until the early hours of Thursday, October 21, and last all day until 10 a.m.
She said: “We see cold air moving south across the UK from Thursday to next weekend, as low surface pressure is moving to the north-east of the UK, creating a northerly airflow.
“winter rain [are] Possible in the Northern Isles and the Scottish Mountains.
“cold spells” [could be] was short lived, although by Monday, 25 October the light Atlantic wind had returned.”
It comes as Britain is facing its worst winter storm in 13 years that could dump piles of snow across the country by the end of the month.
A freezing polar vortex could explode in a matter of weeks – bringing with it a ‘White Halloween’ for some.
In some parts of Wales and Scotland, blankets can be worn until 6 a.m. on 24 October.
But the southern shoreline could also be gathering dust in the “rare” forecast last seen in 2008.
John said that our unusually warm autumn would soon end.
He said: “These high altitude winds normally intensify as we move toward winter.
“An unusual weakening of the polar vortex could have an impact on our weather later in autumn and early winter.
“‘Sudden stratospheric warming’ events can sometimes reverse the polar vortex, which can have a dramatic effect on winter weather and increase the likelihood of severe freezing.”
In his most recent forecast, John said there were no indications that the latest bout of cold weather was not being caused by an inverted polar vortex.
However, he reassured the British that there are no immediate signs of winter whitewashing yet.
“The last time there was significant snowfall in lowland southern Britain was in early October 2008 – a measure of how rare it is,” he said.
But experts said Britons expect to face wet and windy conditions before the snow begins to fall.
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