Monday, 25 Oct 2021

UK heatwave: 20C hot spell to blast UK this weekend – Will there be a mini heatwave?

A band of heat will arrive in the UK this weekend as the nation moves into Spring. The warm weather could see temperatures reach 20C, finally putting an end to heavy rain, freezing conditions and bitter winds.

Will there be a heatwave this weekend?

Met Office meteorologist Nicola Maxi said sizzling temperatures would arrive in time for this weekend.

The warmest day will be on Sunday, where 20C can be expected in South East England and London.

However, Ms Maxi explained this does not qualify for a heatwave.


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She told “Heatwave conditions are very specific and this weekend’s weather won’t reach the criteria.

“By Sunday temperatures will be around 20C for parts of the country including London and the South East.”

The warm temperatures won’t last for long, however, and Ms Maxi explained by Monday it will already be colder.

She said: The warm weather is only going to last for around a day and by Monday is starting to tale off.

“Both before and after Sunday it will be closer to 16C, not 20C.”

The Met Office forecaster explained it’s because of the short period the soaring temperatures will stay it cannot be classified as a heatwave.

Ms Maxi said: “It would have to last over three consecutive days to be a heatwave.

“It also depends on where in the country you are.

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“If you’re in the South East temperatures needs to be higher than further north.

“The threshold for the South West, Wales, Northern England and Scotland is 25C, while in London it’s 28C.

“In the South East the threshold stands at 27C.”

The Met Office writes on its website: “A heatwave is an extended period of hot weather relative to the expected conditions of the area at that time of year, which may be accompanied by high humidity.

“A UK heatwave threshold is met when a location records a period of at least three consecutive days with daily maximum temperatures meeting or exceeding the heatwave temperature threshold.”

With temperatures expected to rise this weekend, punters believe this could be the warmest April on record.

As temperatures are ready to rise into 20C across parts of the UK, Ladbrokes has odds on this going down as the hottest April ever to just 2/1, from 3/1.

Alex Apati of Ladbrokes said: “The temperatures have taken another turn but it’s good news for Brits who could soon be basking in record-breaking April sunshine.”

Why do heatwaves happen?

Heatwaves are most common in summer when high pressure develops across an area.

The Met Office said: “High-pressure systems are slow-moving and can persist over an area for a prolonged period of time, such as days or weeks.

“They can occur in the UK due to the location of the jet stream, which is usually to the north of the UK in the summer.

“This can allow high pressure to develop over the UK resulting in persistent dry and settled weather.”

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