The Met Office has updated a weather warning for severe thunderstorms that could bring disruption to travel and power supplies.

Storms are expected to hit the county from 4pm and continue until 3am.

Flooding could bring danger to life and 60 mm of rain is possible in an hour with a very small chance of 150 mm in three or four hours said the Met Office

A spokesman for the Met office said: "There is a small chance that fast flowing or deep floodwater could suddenly occur, bringing danger to life and rapid flooding of homes and businesses.

"There is also a slight chance of power and other essential services, such as gas, water or mobile phone service will be lost.

"There is a slight chance of damage to buildings/structures from lightning strikes, large hail, or strong winds.

"There is a small chance that spray, sudden flooding, standing water and/or hail will result in rapidly changing, dangerous driving conditions.

"If flooding occurs road closures with long delays and cancellations to bus and rail services are possible.

"There is a small chance communities may be completely cut off.

"These [Thunderstorms] may contain large and damaging hail, torrential rain, frequent lightning and possibly very strong and gusty winds.

"While many areas will see some heavy rain, hail and thunder at times where the worst of the storms occur some exceptional rainfall totals are possible."