The Met Office has issued two yellow weather warnings for Thursday for both Wales and Northern Ireland. Wales has been warned of thunderstorms and Northern Ireland for heavy rains, both of which have the potential to cause flooding that could damage homes and other buildings.
The warning for Wales was issued on Thursday morning at 02:00 BST and will end later the same day at 09:00.
The Met Office said: “Slow-moving heavy showers and possible thunderstorms are likely to cause some disruption on Thursday.
“Thunderstorms will only occur over North West Wales on Thursday.
“Where it occurs, there is the potential for 25-50 mm of rain in a few hours along with a risk of lightning.”
The Northern Ireland warning will take effect from 5am BST on Thursday to 10am BST and warns of travel disruption due to local flooding and spraying on the road.
The Met Office said: ‘An area with heavy rain is likely to develop early Thursday morning.
“It can bring 20-30 mm within a few hours, which will be enough to bring floods to inclined places.”
As for the rest of the week and on the way to the weekend, BBC meteorologist Ben Rich said there would be a “complex weather photo” to take Britons on Friday.
READ MORE: Scots oppose independence as more than half reject IndyRef2
Mr Rich said there would be “another belt of heavy rain showers going east through the day with some sunny periods in between.”
Fortunately, the weather will clear up by Sunday for the most part with only small patches of rain in Scotland and northern England.
Temperatures in England will fluctuate between 19C and 21C on Sunday, while it will still be relatively cold in Scotland in the mid-teens.