Whilst some areas will remain dry, a few thunderstorms are expected to break out during the course of the afternoon and early evening before fading later.

Where thunderstorms do occur, torrential downpours could produce 20-30 mm and possibly as much as 40-50 mm of rain in 2-3 hours. Frequent lightning is likely, along with hail and gusty winds in a few places.

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 small chance that some communities become cut off by flooded roads
There is a slight chance that power cuts could occur and other services to some homes and businesses could be lost

Areas affected in Wales

Denbighshire
Flintshire
Powys