BBC Weather: UK set for ‘milder’ temperatures
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Forecasters say an “Arctic” blast is set to hit Britain from next Thursday with snow expected in some higher parts of the country. The latest minimum temperature charts from WXCharts reveal the mercury next Thursday, October 21 could fall to as low as 1C (33.8F) in the Scottish Highlands, with highs of 10C (50F) in London.
The forecast next Thursday at 6pm predicts temperatures will also be in single figures across Northern England with low minimum ranges of between 4C (39.2F) and 7C (44.6F).
Higher ranges will be expected across England and Wales with average minimum temperatures ranging between 7C and 9C (48.2F) whilst Southern England will see the mercury range to lows of between 8C (46.4F) and 10C (50F).
The Met Office warned snow is “expected on mountain tops across Scotland” and could hit in the early hours of Thursday and last all day.
A spokesperson added: “We see colder air move south across the UK Thursday through to next weekend, due to low pressure at the surface moving away to the northeast of the UK, creating a Northern windflow.
“Wintry showers possible in the North Isles and Scottish mountains.
“[The] Colder spell [will be] short-lived though as milder Atlantic air returns by Monday, October 25.”
The cold weather continues to Saturday, October 23 with temperatures as low as -1C (30.2F).
WXCharts minimum temperature charts reveal the mercury will hit below freezing across Northern Scotland and 0C (32F) across the rest of the country at 12pm.
Meanwhile, most of England and Wales will see very low ranges of between 1C and 2C (35.6F) while parts of the South West will have lows of 4C (39.4F).
John Hammond, meteorologist for Weathertranding said the change in the British weather was due to a change in the “polar vortex” being “knocked off-kilter over the next week or two.”
Mr Hammond, a former BBC weather forecaster, explained the change in the vortex was due to a “modest warming taking place in the stratosphere”
The change of direction for the polar vortex, Mr Hammond said, would cause “bouts of colder air escaping from the Arctic” to hit the UK “later in October”.
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He added: “After a very mild few days, much colder air will arrive from the north later next week, which may bring some snow to the Scottish mountains.
“That cold spell may not last all that long, but frost, and eventually snow, will probably figure more frequently in our forecasts before too long.
“’Sudden stratospheric warming’ events can sometimes lead the polar vortex to go into reverse, which can have dramatic impacts on winter weather and increase the chances of severe cold.”
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