BBC Weather: Europe forecast threat of thunderstorms
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BBC Weather’s Sarah Keith-Lucas warned conditions will take a turn as thunderstorms from the Atlantic will creep across Spain, Portugal, France and the UK. She said: “A lot of hot and dry weather across central and western parts of Europe over recent days. The heat and the dry weather still holding on for many, we’ve got this big area of high pressure sitting across the likes of Germany, up towards Denmark and down to Austria.
“A lot of dry weather but there is low pressure bringing in plenty of showers.
“Heavy showers and thunderstorms affecting northern parts of Portugal and Spain, France and up towards the UK.
“It will be largely dry for Sicily and across the Mediterranean and it’s largely dry in Gibraltar as well.
“To the north of that humidity is sparking off these heavy downpours and thunderstorms mixed into some of those heavy showers.
The UK has so far fallen short of seeing its hottest day of the year, though forecasters are “hesitant” to rule out the possibility later on.
Temperatures in Santon Downham, in Suffolk, reached a high of 28.2C (82.76F) at just before 1pm on Wednesday, the Met Office said.
But this is just below the 29.7C (85.46F) recorded in Teddington, Middlesex, on Monday, which was the hottest day of the year so far.
It comes ahead of thunderstorms set to move in across large parts of England, including London and the South East, from 6pm.
UK weather: Parts of Britain to be hit by thunderstorms
The Met Office has issued a yellow warning meaning people could see flooding to homes and businesses, communities becoming “cut off”, power cuts and delays to public transport following heavy rainfall.
The thunderstorms are the result of a small, low-pressure system moving in from Europe, with warmer surface-level air meeting colder upper air.
Forecaster Simon Partridge told the PA news agency: “The UK has so far seen a high of 28.2C in Santon Downham in Suffolk at 12.45pm, which unfortunately falls just short of being the hottest day of the year.
“But I’d be hesitant to rule out it becoming hotter later on in the day as temperatures could reach the 30C point, it’s possible.
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“The higher cloud hanging above parts of the country will make it difficult, as it blocks out the sun and stops it from getting any hotter, but we’ll see, there’s definitely potential.”
However, Mr Partridge warned that thunderstorms are beginning to build and develop across the English Channel, and will reach southern areas of the UK by around 7pm.
He said: “This will bring heavy rainfall, loud thunder and frequent displays of lightning for much of England and south Wales until about midnight.
“The rain will be pretty heavy with up to 30mm falling in quite a short time frame.
“It will be a horrible night for many, especially when you’re trying to get some sleep, remaining quite hot and humid in London and the South East, at around 17-18C, combined with the damp weather.”
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