Some places could see slow-moving heavy showers and thunderstorms during Friday.

What to expect

• Spray and sudden flooding could lead to difficult driving conditions and some road closures
• Where flooding or lightning strikes occur, there is a chance of delays and some cancellations to train and bus services
• There is a slight chance that power cuts could occur and other services to some homes and businesses could be lost

While some areas will remain dry, slow-moving, heavy showers and thunderstorms are likely to develop from mid to late morning, before decaying during the evening. Where thunderstorms occur, 20-25 mm of rain is possible in less than an hour, and in one or two places 40-50 mm could fall in 2 or 3 hours. Hail and lightning are potential additional hazards.