- Information on update: Warning updated to remove Northern Ireland from the warning area, the risk of impactful weather having diminished here. Whilst some places will avoid them, thunderstorms and areas of heavy rain are likely to continue to affect various areas of Northern Ireland and Scotland overnight and at times through Monday. The thunderstorms may begin to ease across western and northern areas later. 20-30 mm of rain could fall within an hour in a few places, and up to around 50 mm in three to six hours. Hail and frequent lightning are also possible hazards. For further details see ... 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; 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.