Slow-moving showers and thunderstorms are expected to develop during Sunday afternoon.
The Met Office has issued a yellow weather warning for thunderstorms across the region on Sunday 26 May.
The warning is in force from 12 noon until 8 pm.
The Met Office said:
‘Rainfall accumulations will vary significantly across the warning area but where showers become organised, there is the possibility of 20-30 mm of rain falling in an hour or less.
‘Frequent lightning and hail (particularly in the east of the area) may also cause impacts.’