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Hail, gusty winds and torrential downpours are due to hit many parts of Wales over the next three days.

The first Met Office weather warning for heavy rain and thunderstorms comes into force at 7pm today.

Now, further details have been published for early next week as the bad weather is set to continue.

Meteorologist Luke Miall said: "We could see some really lively downpours through the evening, with the risk of flash flooding, some hail and gusty winds."

Today

(Image: Met Office)

What does the weather warning say? Thunderstorms may develop late on Sunday, bringing torrential rain and lightning, with possible flooding and disruption to travel.

When will the thunderstorms start? The warning comes into force at 7pm today.

Which areas does it cover? Conwy, Denbighshire, Flintshire, Gwynedd, Isle of Anglesey and Wrexham.

Monday

(Image: Met Office)

What does the weather warning say? Heavy rain and thunderstorms may lead to flooding and disruption to travel.

How long will the thunderstorms last? The weather warning applies to the whole day.

Which areas does it cover? Conwy, Denbighshire, Flintshire, Gwynedd, Monmouthshire, Powys and Wrexham.

Tuesday

(Image: Met Office)

What does the weather warning say? Further thunderstorms are likely, potentially severe, bringing a risk of flooding and disruption to travel.

How long will the thunderstorms last? The weather warning applies to the whole day.

Which areas does it cover? Blaenau Gwent, Bridgend, Caerphilly, Cardiff, Carmarthenshire, Ceredigion, Denbighshire, Flintshire, Merthyr Tydfil, Monmouthshire, Neath Port Talbot, Newport, Pembrokeshire, Powys, Rhondda Cynon Taf, Swansea, Torfaen, Vale of Glamorgan and Wrexham.

What to expect

The Met Office says:

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 slight chance that power cuts could occur and other services to some homes and businesses could be lost.

There is a small chance of fast flowing or deep floodwater causing danger to life.

(Image: PA)

How to stay safe in thunder and lightening

This is the advice from the UK's national weather service.

Before the thunderstorm:

Unplug all non-essential appliances, including the television, as lightning can cause power surges.

Seek shelter if possible. When you hear thunder, you are already within range of where the next ground flash may occur. Lightning can strike as far as 10 miles away from the centre of a storm.

During the thunderstorm:

Avoid using the phone - telephone lines can conduct electricity.

Avoid using taps and sinks - metal pipes can conduct electricity.

If outside, avoid water and find a low-lying open place that is a safe distance from trees, poles or metal objects.

Avoid activities such as golf, rod fishing or boating on a lake.

Be aware of metal objects that can conduct or attract lightning, including golf clubs, golf buggies, fishing rods, umbrellas, motorbikes, bicycles, wheelchairs, mobility scooters, pushchairs, wire fencing and rails. If you are in a tent, try to stay away from the metal poles.

If you find yourself in an exposed location, it may be advisable to squat close to the ground, with hands on knees and with head tucked between them. Try to touch as little of the ground with your body as possible, do not lie down on the ground.

If you feel your hair stand on end, drop to the above position immediately.

(Image: Tony John)

After the thunderstorm:

Avoid downed power lines or broken cables.

If someone is struck by lightning, they often suffer severe burns. The strike also affects the heart, so check if they have a pulse.

What is the outlook for the rest of the week?

Forecasters say it will remain humid and become hot in some areas from mid week.

The weather is expected to turn windy in south Wales on Wednesday and Thursday.

There are no weather warnings in place for Wednesday, Thursday, Friday or Saturday.

According to Natural Resources Wales, the flood risk for the next five days is medium.