Rain will move in during Sunday morning from the south-west and spread further into Wales and central southern England by the end of the day.
The rain is not expected to be as intense as that seen over the last week.
However, with around an inch (25mm) of rain possible within the warning area, there could be some impacts. The Met Office yellow warning for rain, which is valid from 1600BST Sunday to 0900BST Monday, also states that there could be over three inches (80mm) of rain on some hills in the south-west of England and south Wales.
Heavy rain will then spread to other parts of England and Northern Ireland during Monday and Tuesday. It could persist for some, adding to flooding concerns.
