Between 09:00 Fri 1st and 22:00 Fri 1st
Thunderstorms are likely to affect northern and western parts of the UK during Friday.
What to expect
There is a small chance that homes and businesses could be flooded quickly, with damage to some buildings from floodwater, lightning strikes, hail or strong winds
There is a small chance of fast flowing or deep floodwater causing danger to life
Where flooding or lightning strikes occur, there is a chance of delays and some cancellations to train and bus services
Spray and sudden flooding could lead to difficult driving conditions and some road closures
There is a slight chance that power cuts could occur and other services to some homes and businesses could be lost
Reason for update
Area moved north to capture the most likely area for thunderstorm development during daytime on Friday.
Further details
Scattered heavy showers and thunderstorms are likely to develop during Friday, particularly the afternoon and then easing only slowly through the evening.
Some places will miss the worst of the heavy showers and thunderstorms, but where they do occur they are likely to bring torrential rain with the potential for 20-30 mm of rain to fall in an hour and perhaps as much as 50-60 mm in 3 hours in a few locations.
Lightning and large hail are also possible.