Long-range forecast: Britain to bake in three-day 28C Azores heatwave – new maps turn RED

BBC Weather: Torrential downpour to hit parts of the UK

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Netweather’s temperature charts show that between July 16 and 18, the mercury in large parts of the UK will rise to as high as 28C (82.4F). Netweather’s charts, based on GFS model data, turn dark red across England, Wales and Southern Scotland with the high pressure sweeping in from the Azores.

The mercury could reach as high as 28C (75.2F) in southeast England and London on July 17 as high pressure sits over the UK.

Other parts of England on this day see temperatures range between 23C (73.4F) and 26C (78.8F) whilst Scotland will see more modest ranges of between 14 and 18C (57.2-69.8F).

Most parts of Wales will sear in 23C heat (73.4F).

The 28C (82.4F) peak on Saturday, July 17 will also be matched on Friday, July 16 whilst there will be highs of 27C (80.6F) on Sunday, July 18, also in Southern England.

Netweather’s long-range forecast between Monday, July 12, and Sunday, July 18 also predicted temperatures could be much warmer.

The forecast said the pressure is expected to be “relatively high to the north of Britain and over Scandinavia.”

The forecast suggests a high-pressure ridge will drift north-eastwards from the Azores and link with a Scandinavian high, covering much of the British Isles.

It added: “This points towards drier and more settled conditions generally for much of the UK, and probably a fair amount of sunshine for most”

Brian Gaze, Forecaster at The Weather Outlook, added: “There is a clear warming trend showing on the table.

“Warm or very warm seems considerably more probable than hot.”

Meanwhile, a rainfall yellow weather warning has been issued by the Met Office for a large part of the country today.

This covers northern parts of England, a large majority of Scotland and Northern Ireland with forecasters saying there is a potential for hail.

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Sunny spells meanwhile are predicted for the South and Midlands in England and across Wales on Sunday with highs of 22C, which is slightly below average for this time of year.

Greg Dewhurst, a senior meteorologist at the Met Office, said: “Our main message throughout the whole weekend is there is likely, wherever you are in the UK, to be some heavy showers around.

“Be prepared if you’re travelling over the next couple of days with those heavy, heavy thunderstorms around.”

Overnight tonight, it will be damp for many, with rain for much of Scotland, Northern Ireland and England, and showers for Wales.

However, the rain is going to be heavy for southern and central Scotland as well as northern England after midnight with gentle south-westerly winds.

The mercury tonight will see temperatures across the country range between 12C (53.6F) and 16C (60.8F), which is also the case in Scotland.

Northern England will see ranges of between 15C (59F) and 16C (60.8F), Wales 13C (55.4F) to 14C (57.2F) whilst southern England will see average conditions with temperatures between 14C (57.2F) and 16C (60.8F).

Going into Monday, there will be rain for Scotland and northern England, often heavy in parts of Scotland.

There will be scattered showers in southern areas throughout the day, while rain will arrive into southwest England during the evening and this rain will be heavy in places.

Temperatures tomorrow will range between 13C (55.4F) and 20C (68F) with the highest in east and southeast England.

Northern England will see ranges of between 16C (60.8F) and 19C (66.2F) whilst most of Wales will see temperatures of 17C (62.6F).

Meanwhile, Scotland will see more moderate temperatures between 13C (60.8F) and 19C (68F).

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