The Met Office have issued another severe weather warning for the area, yet have added that many areas will probably miss them.
Scattered but potentially intense thundery downpours seem likely to affect parts of the warning area from late Wednesday and through Thursday.
The public are advised to be aware of possible localised “medium” impacts from either flooding or frequent lightning.
The cause of the possible storms is increasing warm and humid air will arriving from France later on Wednesday, bringing with it an increased risk of thunderstorms.
At this stage, the Met Office say that there is still room for error in the northwestward extent of this airmass, and also how widely thunderstorms develop and where. The southeast of the warning area is currently considered most at risk and updates to the warning will be made as new information becomes available. 30 mm or more could fall in an hour very locally, with 50 mm or more in 2 hours.