FORECASTERS have revealed the exact date thunderstorms are set to hit Britain.
It comes as temperatures are finally set to rise in the UK for the next week after a dreary start to summer.
The Met Office predict sunny spells and warm temperatures for the next six days.
And the mercury will even rise as high as 30C in parts of the country.
However, there will be thunderstorms as humidity rises.
Forecasters say Brits will be hit by bands of heavy and thundery rain pushing northeastwards on Friday.
Nearly the entirety of the UK will be affected - with Manchester and its surroundings being hit the worst.
In the meantime today and tonight will be dry with clear spells for many.
Temperatures will hit 25C at least.
And tomorrow will be warm and dry for most, with plenty of sunshine.
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Deputy Chief Meteorologist Dan Harris, said: “A general warming trend is expected through much of this week, as the weather settles down for a time.
“Whilst some southern areas are already likely to reach the mid 20s by Wednesday, it’s not until Thursday that the warmer weather will become more widespread, with parts of Scotland also reaching the low 20s.
“Most places will be dry with sunshine, although some early mist and low cloud could mean a slow start for some areas.
“We are likely to see the warmest weather on Friday and Saturday, with low to mid 20s widely and a peak of 29C most probable in the southeast; at this stage the odd 30 Celsius here on Friday cannot be ruled out.
“A frontal system arriving into the west and southwest later on Friday, which could be preceded by thunderstorms, does complicate matters somewhat; after a very muggy night in the southeast overnight into Saturday.”