The warning is in place for Saturday 8 July from 9 am until midnight.
Met Office forecasters said:
‘Heavy showers and thunderstorms are expected on Saturday, during the morning mainly over parts of England before becoming mainly focused over northern England and Scotland by late afternoon/evening.
‘Some intense downpours are likely and whilst rainfall accumulations will vary from place to place, as much as 50 mm of rain could fall in a short space of time in some locations. Hail, lightning and gusty winds will be additional hazards.