The BBC Weather forefcaster told Breakfast viewers hot air from the south will sweep in on Friday across the whole country, keeping the north a bit cooler than the scorching hot south. In London temperatures will reach up to 36C or more, and overall temperatures will be close the 30C mark. Carol Kirkwood warned nights will feel “uncomfortable” for many this weekend. She said: “First thing this morning it’s a pretty muggy start, there’s quite a lot of low cloud, drizzle across western coast areas for England and Wales.
“In Scotland and Northern Ireland you’ve got the rain coming from the west, and there will be a wee more cloud across northern England and Scotland.
“You could catch the odd shower but that’s it.
“In the sunshine, temperatures are really picking. The Midlands up to 30C, in the south-east 36C.
“And then it gets progressively more comfortable as we move a bit up north.
“Through this evening and overnight, that weather front bringing the rain in Scotland and Northern Ireland sinks southeastwards.”
She warned: “It’s going to be very muggy. It’s going to be uncomfortable for sleeping in.”
Public Health England has extended a level three heat-health warning across the South of England, with a heatwave potentially lasting throughout the weekend.
Temperatures as high as 38C (100.4F) could scorch Southern England over the weekend, with little cloud to break up the unbearable heat. But Northern England, Wales and Scotland are set to see a more enjoyable Friday with temperatures hitting 23C (73.4F) across the Northern regions.
Met Office Chief Meteorologist, Dan Suri, said: “Although much of the UK can expect a spell of warm and sunny weather lasting into early next week, it’s going to turn very hot for parts of England and Wales with temperatures widely reaching above 30 Celsius on Friday, Saturday and Sunday.
Mr Suri also claimed that today (Friday) “is likely to be the hottest day”, seeing temperatures of 36C (96.8F) to 37C (98.6F) in parts of east and southeast England.
He added: “It’s possible temperatures could reach similar levels on Saturday, before falling slightly on Sunday.
“There’s also a small chance temperatures could reach close to 38C (100.4F) in one or two spots in the southeast on Friday, but this will partly depend on the chance of cloud spreading in from the southwest during the afternoon.
“Along with hot weather by day, it will stay warm and humid overnight with temperatures remaining in the high teens and low 20s Celsius.”
The South of England has seen the second highest heat warning PHE can issue, after Met Office meteorologists say the have a “greater than 90 percent confidence level that the day threshold temperature will be met” today.
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Threshold temperatures for a heatwave are 32C (89.6F) for London, which is set to blister in 35C (95F) by 4pm.
For the South East the threshold for a heatwave is 31C, and the region is on track to smash that with a blistering 36C (96.8F).
Experts are also warning that today could even break the all-time record for Britain’s hottest day.
Currently the hottest day on record for the UK is 38.7C (101.66F), seen in Cambridge in July last year.
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