The Met Office has issued a yellow weather warning for heavy rain and thunderstorms.
The warning is in place from midnight on Saturday 17 June to midnight on Sunday.
A Met Office forecaster said:
‘Heavy showers and thunderstorms are likely to develop across parts of England and Wales during Sunday, with longer spells of thundery rain in places.
‘Whilst many areas will see at least some rain, most will see only relatively small amounts.
‘However, some places could see 30 mm in an hour and 60mm in 6 hours, with the potential for frequent lightning, strong winds and hail.
‘Where this occurs there is likely to be some disruption.
‘While there is a high likelihood that thunderstorms will develop over England and Wales, there remains a large amount of uncertainty in exactly where these develop.
‘This uncertainty is likely to remain even up to short lead times.’