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Met Office hour-by-hour guide on when thunderstorms are going to hit Wales


Temperatures are progressively set to return to regular for the time of yr over the weekend.

But an space of low strain that’s transferring in from the Atlantic can also be set to carry heavy rain and thunderstorms to elements of Wales, with a yellow climate warning in place.

The climate is coming in to the UK from the west, so Wales will probably be bearing the brunt of the unhealthy climate.

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On Thursday, Welsh climate forecaster Derek Brockway mentioned: “A toasty 27°C in Mumbles this afternoon but cooler over the weekend with a risk of thunder. Back to normal next week and changeable!”

Met workplace climate forecaster Aidan McGivern mentioned: “The low is pushing closer to the UK, and the first thing it does as it reaches the high that has been dominating the weather over the past week, is that it pushes the hottest weather further north-west.”

His colleague Sabrina Lee mentioned: “Expect a cool down in those temperatures. Temps will return closer to average in the low 20s. Weather warning all weekend.

“You ought to all really feel a distinction in the way it feels by the weekend. Friday the utmost temperatures will probably be barely decrease, however it’s nonetheless feeling heat.

“Largely dry and sunny but a few thundery showers are possible, mainly in the west, followed by something cooler and wetter this weekend.”

Here is a breakdown for the way the weekend is trying:


The warmth will probably be centered on western elements of the UK, together with west Wales.

Met workplace climate forecaster Aidan McGivern says: “That is where we could see a thunderstorm or two, especially over higher ground. They will be very isolated, but where they do occur they will be quite impactful.”

He mentioned extra rain will transfer in on Friday evening, however will probably be primarily outbreaks that may transfer rapidly.


The low will decelerate and settle over Wales and elements of England.

Aidan says: “There will be prolonged showers or longer spells of rain [that] will be more and more slow moving and will tend to impact south Wales more during Saturday.”

The yellow climate warning for a big a part of Wales begins at midnight on Saturday.

The Met Office climate map for Cardiff present sunshine and showers at 7am with an 80% likelihood of heavy rain at 10am, and persevering with to rain by means of to 1pm, with sunshine and showers for the remainder of the afternoon.

For Swansea , it’s exhibiting heavy rain for a lot of the morning, sunshine and showers between 1pm and 4pm after which the possibility of thunderstorms between 4pm and 7pm.

This is the climate map for Brecon on Saturday:

(Image: Met Office)

The forecast for Bangor is exhibiting a day of sunshine, with some cloud round highs of 20° round 4pm.

The areas in Wales lined by the warning are:

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

Weather on your space by postcode:


The day of the weekend when there are most certainly to be thunderstorms, however primarily within the south of Wales. The rain climate warning is in place till midnight on Sunday.

Aiden says: “The low is slow moving and it is likely to bring some heavy rainfall first thing, and then showers and thunderstorms will break out fairly widely around the low, across much of England.

“It is throughout elements of Wales that the slowly transferring rainfall or showers might trigger affect. They are hit and miss, extremely variable place to place. Some locations, when you get bathe after bathe, or thunderstorm after thunderstorm, it might rise up to 100mm of rainfall.”

The average temperature would be about 23C.

In Cardiff , the Met Office weather map is showing a dry morning, before sunshine and showers are forecast from 1pm.

For Swansea , it seems to be a better day with sunshine and showers between 1pm and 7pm.

In Brecon , the map is showing a dry morning, following an afternoon of sunshine and showers between 1pm and 7pm.

The rain warning for the weekend states: “Outbreaks of rain and a few thunderstorms are anticipated to unfold from the southwest on Friday evening, this introducing unsettled situations to a lot of England and Wales for Saturday and Sunday.

“Heavy, thundery showers are likely to break out by day, particularly on Sunday when these could be widespread and locally torrential.

“Lightning and hail are additionally anticipated. Rainfall quantities will differ from place to place, however there may be the potential for up to 100 mm to construct up in some places over the course of the weekend, a lot of which might fall in a brief time period.”

Next week it looks set to be back to typically summer UK weather.

Aiden says: “Next week, the UK is on the dip aspect of the jet stream that means we are on the cool aspect of it and the unsettled aspect of it, so that’s the pattern for a lot of subsequent week.

“Low pressure little below average mixed and changeable. Not a complete washout.”

The Met Office lengthy vary forecast is predicting that it’s going to heat up once more firstly of August.

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