The Met Office has issued this warning for thunderstorms across the north of the county.
The warning is in force from 2 pm until midnight on Sunday 10 September.
Detail: An area of thunderstorms is expected to develop over parts of England and Wales on Sunday then move north and northeast into Northern Ireland and parts of Scotland.
Some large areas of rain are likely but many parts will see modest rainfall amounts.
However, embedded intense rainfall may bring some very large totals with 30-50 mm in an hour or less possible and perhaps 70 mm or more in a few hours for unlucky locations.
At the same time frequent lightning and large hail will be additional hazards.