UK weather forecast: Sizzling week-long blast to scorch nation as sub-tropical air hits

BBC Weather forecasts temperatures to soar across Europe

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BBC forecasters predict a warm, dry spell will characterise much of the UK by the end of this month, as a bout of high pressure moves in from the southwest. Meteorologists expect the sunny weather to last a week, as the subtropical Atlantic air lingers for several days. Temperature charts show highs of 27C are forecast on a number of days between Saturday July 17 and the following seven days.

Netweather temperature charts show the mercury is set to soar from next weekend, with much of England expecting highs of 25C.

The map, valid for 6pm on Saturday, July 17, shows huge swathes of the UK turn a deep red as the warm spell strikes.

Sunday is set to be even warmer, with a scorching 27C forecast in the capital by late afternoon.

The hot spell looks set to continue into the start of the new working week, with temperatures set to reach the low-20s.

Temperatures look set to increase even further by mid-week, with 23C forecast across much of England and Wales.

By Thursday the mercury is expected to rise to highs of 27C, with the best of the weather seen across the south of England.

Parts of Scotland and Wales will also enjoy some warm sunshine, with highs of 24C forecast.

The scorching temperatures look set to continue through Friday, with 27C forecast again in parts of the south east.

Netweather does not have any maps that go beyond midnight July 23, so it is possible the hot spell will continue beyond this date.

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BBC forecasters expect the warm well to move in from mid-to-late July.

They said: “We still think the best chances for a warmer and drier spell will be in late July as high-pressure shifts overhead from the southwest before continuing eastward into Russia.

“This period will likely last around a week bringing some prolonged dry, sunny, and warm weather for the whole UK.

“This would be a more southwesterly wind carrying sub-tropical Atlantic air, which is warm but not overly hot.

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“There is a slight chance that we could see a hot southerly wind for a few days as high-pressure shifts into Germany, but confidence is low on that.”

But the forecasters caution unsettled conditions could move in by the start of August and said: “Cooler weather is likely to be the norm for this summer, with only temporary deviations to warmer, drier spells.”

Netweather forecasters said the period from July 19-July 25 will likely resemble a heatwave.

They said: “This week is the most likely to feature a significant heatwave for the UK, with southerly and south-easterly winds likely to feature as the fine anticyclonic weather breaks down from the west, potentially pulling some hot air masses up from southern Europe and also creating the potential for thundery breakdowns.”

The forecasters added: “Thus, much of the UK is expected to be warmer and sunnier than average this week, and possibly substantially warmer than average with positive anomalies of over 3C in some regions, though many south and east-facing coasts may be closer to normal.”

The Met Office said weather conditions are set to improve from the end of next week.

They said: “From mid-next week onwards, conditions could gradually become more settled with a good deal of dry weather, variable cloud and spells of sunshine, though this is still uncertain.

“For the remainder of this period, there is a greater chance of warmer and drier than average conditions overall.”

The forecasters added: “Temperatures are likely to be above average, with the south possibly feeling very warm or hot at times.”

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