A yellow weather warning has been issued by the Met Office for thunderstorms across parts of Gwynedd.

The warning comes into force at 7pm this evening (Wednesday, 19 August), and will remain in place until 10am tomorrow morning (Thursday, 20 August).

A Met Office spokesperson said: “Heavy showers will develop this evening, becoming more frequent and widespread overnight.

“These are likely to bring 15 to 20 mm in an hour in some areas with as much as 30 to 50 mm falling in a period of six hours in some places.

“These accumulations may lead to a few places seeing some flooding.

“Alongside the rain, some showers are likely to be thundery, bringing the additional hazards of lightning and hail.

“The showers will ease from the northwest Thursday morning.”

The Met Office website states “there is a good chance driving conditions will be affected by spray, standing water and/or hail, leading to longer journey times by car and bus”.

Traffic Wales North & Mid has issued a warning to drivers. Sharing the weather warning, they said: “Please drive cautiously and adjust to the road conditions. Stay safe!”