Image copyright Gareth Fuller | PA Media Image caption Strong winds and heavy rain is forecast for Wales

Wales is likely to be hit by heavy rain, thunderstorms and strong winds with the potential to cause disruption, the Met Office has warned.

Up to 30mm (1in) of rain could fall in a few hours on Friday.

And "unseasonably strong" winds could cause problems on Friday and Saturday, with gusts of more than 40mph (64km/h).

The National Eisteddfod taking place at Llanrwst in Conwy said it had "contingency plans" in place.

And campers around the Welsh coast have been advised to prepare.

The Met Office has issued three weather warnings covering Friday and Saturday.

"A band of heavy rain followed by heavy showers or thunderstorms has the potential to bring disruption" across Wales on Friday, it warned.

There is also a small chance that properties and roads could be flooded, it said.

It has extended a warning for strong winds on both Friday and Saturday which have the potential to affect travel and cause damage.

Image copyright Met Office Image caption Weather warnings are in place for Friday (left) and Saturday across Wales

Western Power Distribution said it was putting "precautionary measures" in place from 09:00 BST Friday.

Operations will be "ramped up" in control rooms and contacts centres with staff on standby to deal with any issues, a spokesman said.

Friday's warning for winds covers Anglesey, Bridgend, Carmarthenshire, Ceredigion, Conwy, Gwynedd, Neath Port Talbot, Pembrokeshire, Powys, Rhondda Cynon Taf, Swansea and Vale of Glamorgan.

Saturday's windy weather warning covers the whole of Wales, during the daytime in particular.

Pontypridd's Vintage Transport Day - which was due to have a display of about 200 cars on Saturday - has been cancelled.

A spokeswoman for Cardiff Airport said all flights were currently set to fly as scheduled, but urged those travelling to monitor its website for any changes.

Pembrokeshire council advised people on camping and caravan sites near the coast to secure their belongings due to strong winds and to take care near rough seas.

Organisers of the three-day Pembrokeshire Show said they were "closely monitoring" the weather forecast ahead of it starting on Tuesday.

Eisteddfod chief executive Betsan Moses said plans were in place at the festival.

"We have everything planned and organised for the weekend but we are assessing continuously," she said.

In March, the Eisteddfod announced it was making changes to its preferred location following significant flooding.

The week-long event, which moves to different communities each year, is expected to attract about 150,000 visitors to Llanrwst by its close on Saturday.