North Wales has been issued two yellow weather warnings which will be in place over three days due to thunderstorms and heavy rain.

The Met Office issued a yellow weather warning due to thunderstorms which will be in place across most of Wales from 12pm to 9pm on Tuesday (May 21).

The thunderstorms are likely to cause flooding, travel disruptions, loss of power and damage to buildings.

Alongside that, a second yellow weather warning has also been issued by the Met Office due to heavy rain and flooding which will be in place across all of North Wales from 12.15am on Wednesday (May 22) until 6am on Thursday (May 23).

The heavy rain, which could see some areas receive up to 150mm, may lead to flooding, damage to buildings and pose a danger to life.

The weather warnings are set to affect all of North Wales including Anglesey, Conwy, Denbighshire, Flintshire and Wrexham.

What to expect from the yellow weather warnings in North Wales

Thunderstorms (Tuesday, May 21)

The Met Office said the first yellow weather warning was issued for parts of North Wales due to thunderstorms which could cause disruptions and flooding.

The thunderstorms associated with the yellow weather warning are also set to cause:

  • Spray and sudden flooding which could lead to difficult driving conditions and some road closures
  • Delays and cancellations to train and bus services as a result of flooding and lightning strikes
  • Power cuts and disruptions to other services
  • Flooding
  • Damage to some buildings from floodwater, lightning strikes, hail or strong winds

A Met Office spokesperson added: "Heavy showers and thunderstorms are expected to develop during the afternoon across parts of southwest England, Wales and the West Midlands before slowly dying out during the evening.

"Many places will miss the worst, but where they do develop, some slow-moving and intense downpours are possible, giving accumulations of 20-30 mm in around 1 hour, and a lower likelihood of 40-50 mm in 2-3 hours in a few locations.

"Frequent lightning strikes and hail are also possible."

Everywhere in Wales set to be affected by yellow weather warning

Areas of Wales set to be impacted by the yellow weather warning issued for thunderstorms by the Met Office are:

  • Blaenau Gwent
  • Bridgend
  • Caerphilly
  • Cardiff
  • Carmarthenshire
  • Ceredigion
  • Conwy
  • Denbighshire
  • Gwynedd
  • Merthyr Tydfil
  • Monmouthshire
  • Neath Port Talbot
  • Newport
  • Pembrokeshire
  • Powys
  • Rhondda Cynon Taf
  • Swansea
  • Torfaen
  • Vale of Glamorgan
  • Wrexham

The Leader: The heavy rain warning will cover all of North Wales, while the thunderstorm warning will only impact parts.The heavy rain warning will cover all of North Wales, while the thunderstorm warning will only impact parts. (Image: Met Office)

Heavy rain and flooding (Wednesday to Thursday, May 22 and 23)

The Met Office said the second yellow weather warning was issued across North Wales due to heavy rain and flooding.

The heavy rain associated with the yellow weather warning is also set to cause:

  • Some communities to be cut off by flooded roads
  • Spray and flooding which could lead to difficult driving conditions and some road closures
  • Flooding could lead to damage to buildings
  • Fast flowing or deep floodwater, causing a danger to life
  • Delays or cancellations to train and bus services

A Met Office spokesperson added: "An area of rain is expected to develop across eastern and central England and then move northwestwards to affect northern England and north Wales during Wednesday afternoon.

"The area of rain could then become slow moving, heavy and persistent, especially over north facing hills, before clearing during Thursday morning.

"There is a lot of uncertainty over exactly where the heaviest rain will occur and this warning is likely to be updated.

"Many places will see 30-40 mm of rain, while a few areas may receive 60-80 mm.

"There is also a small chance that a few upland areas could see much higher totals, in the order of 100-150 mm."

Everywhere in Wales set to be affected by yellow weather warning

Areas of Wales set to be impacted by the yellow weather warning issued for heavy rain and flooding by the Met Office are:

  • Ceredigion
  • Conwy
  • Denbighshire
  • Flintshire
  • Gwynedd
  • Isle of Anglesey
  • Powys
  • Wrexham

The yellow weather warnings will be in place across North Wales from 12pm on Tuesday, May 21, until 6am on Thursday, May 23.