Thunderstorms set to kick off week of hot weather

Thunderstorms will bring a wet start to the week for some parts of the UK, but sun-worshippers can expect to see the hottest temperatures of the year so far by the weekend.

The mercury could rise to 33C in the south east of England by Friday, while overnight highs of 19C throughout the week will mean muggy conditions for many.

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Summer arrives in UK
The sun rises over Coquet Island, off the Northumberland coast, which is a haven for 90% of the roseate tern population. Warm temperatures and sunny conditions are set to bring some respite after thunderstorms and heavy rain battered parts of the UK this week.
Poppies and wild flowers surround Whitburn Windmill near Sunderland.
People enjoying the hot weather in St James's Park in London.
Poppies and wild flowers surround Whitburn Windmill near Sunderland. (Photo by Owen Humphreys/PA Images via Getty Images)
Poppies and wild flowers surround Whitburn Windmill near Sunderland. (Photo by Owen Humphreys/PA Images via Getty Images)
People enjoying the hot weather in St James's Park in London.
People enjoying the hot weather in St James's Park in London.
People enjoying the hot weather in St James's Park in London.
Rare noctilucent clouds shine over Swaledale in the Yorkshire Dales.
Rare noctilucent clouds shine over Swaledale in the Yorkshire Dales.
Rare noctilucent clouds shine over Swaledale in the Yorkshire Dales.
The sun rises over Swaledale in the Yorkshire Dales.
A woman sits in front of empty deckchairs in Green Park, London, on what is expected to be the hottest day of the year. (Photo by Kirsty O'Connor/PA Images via Getty Images)
Poppies and wild flowers surround Whitburn Windmill near Sunderland. (Photo by Owen Humphreys/PA Images via Getty Images)
A group of people sit on a bench during a warm day at the city center of Sheffield , Great Britain on 22 June 2019. (Photo by Giannis Alexopoulos/NurPhoto via Getty Images)
A group of people sit on a bench during a warm day at the city center of Sheffield , Great Britain on 22 June 2019. (Photo by Giannis Alexopoulos/NurPhoto via Getty Images)
People enjoying the hot weather in St James's Park in London. (Photo by Victoria Jones/PA Images via Getty Images)
A group of people sit on a bench during a warm day at the city center of Sheffield , Great Britain on 22 June 2019. (Photo by Giannis Alexopoulos/NurPhoto via Getty Images)
People enjoying the hot weather in St James's Park in London. (Photo by Victoria Jones/PA Images via Getty Images)
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High humidity on Monday and Tuesday will spark thunderstorms and weather warnings are in place for Northern Ireland, Scotland and much of England.

The best of the weather will be in western Wales and the south west of England, Met Office forecaster Simon Partridge said.

He said: "Thunderstorms will be fairly well scattered and not everyone will see them but again if you do catch one they're likely to be pretty hefty downpours.

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(PA Graphics)

"Overall through much of England and Wales tomorrow generally speaking it's a reasonably dry day with some bright sunny spells but there's that risk of thundery showers which can break out anywhere in those areas.

"The most reliable places to stay dry and see the best of the sunshine really is western Wales and south-west England on Monday."

As much as 80mm of rain could fall in Scotland, while 40mm is forecast to fall in parts of Northern Ireland and most of England.

Temperatures are likely to reach 28C in London and 21C in Wales and Northern Ireland, but will be lower in Scotland with a high of around 14C on Monday.

The highest temperature of the year so far was 28.8C in Norfolk on June 2.

The June record is 35.6C, which occurred in Southampton in 1978.

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