The showers will be most frequent in the north and west of the country.
The Met Office has already received hundreds of suggestions of what to call storms for the upcoming season.
Britain’s highest ever temperature record could fall on Thursday.
The dry weather precedes a four-day heatwave next week when temperatures could peak at 34C.
It's a fresher day but we could still see a high of 25 degrees.
It will be a warm day for all, with top temperatures of 26 Celsius.
A few light showers may develop across central, northern and eastern parts.
Their warning came as the Chief Inspector of Constabulary said public safety 'could be put at risk'.
Some showers in the north but it's a hot day for most.
Yellow weather warnings for thunderstorms are in place across much of England, Scotland and Wales from noon on Sunday.