UK heatwave: Exact date 18C mini-heatwave is predicted as African plume hits Britain


The UK is set to be hit by a mini-heatwave over two days next week as temperatures soar as high as 18C next Wednesday and Thursday.

Weather maps from Netweather and WXCharts have revealed which areas are due to be hit hardest by the mid-March blast of heat.

The areas which will see the highest temperatures are the south and southeast of the UK with cities and towns such as London, Southampton, Dover, and Canterbury due to see 16C.

Further west, in Devon and Cornwall, temperatures will dip slightly to 13C in Devon and 10C on the Cornish coast. Meanwhile, cities, towns, and villages further north will see much lower temperatures.

In Newcastle, Edinburgh, and Aberdeen temperatures will hover around 10C. Newcastle will experience a cool eight degrees, similar to Inverness in Scotland.

Ahead of the plume of heat striking the UK weather expert Jim Dale told the Express that the warm weather will be a constant theme early next week.

He explained: “It will start to feel spring-like on Monday, Tuesday and Wednesday, possibly Thursday at a push, but that comes off on Friday, with colder nights and frosts, swinging around between spring warmth and then a step back into colder weather. That’s the direction of travel.”

While the warm weather may be welcome in the UK, it will form part of a period of changeable weather conditions swinging from dry and warm weather to torrential rain.

This has been reflected by weather maps suggesting that by March 23, conditions will be much cooler, so cold that there will be frost in Scotland.

Mr Dale explained: “On Saturday morning (March 23), there’s a frost in Scotland. I would expect it to be cold but not frosty further south, though the north of England might be a little bit frosty. Nothing too ingrained, but a reversal of what we’ve been seeing.”

Ahead of the mini-heatwave, there will be much wetter conditions including heavy rain for parts of England and Wales. This weekend, the Met Office has issued a yellow rain warning for a small area of Wales around Swansea.

They said: “Heavy rain likely to lead to some surface water flooding and transport disruption overnight and early Sunday morning.

“A spell of heavy rain overnight will bring widely 20-30 mm and possibly 40-50 mm in a few places.”

Met Office five-day forecast: Saturday, March 16th – Wednesday, March 20th

This Evening and Tonight:

Cloudy with outbreaks of rain, which could be heavy at times, particularly across the south. Turning drier in western parts later in the evening. Milder than the previous night.

Sunday:

A wet start for eastern areas with rain slow to clear. Elsewhere drier with some sunny spells and the odd shower. Mild again and feeling pleasant in any sunshine.

Outlook for Monday to Wednesday:

Largely dry to start the new working week, but with rain soon arriving from the west. Changeable with temperatures close to average for the time of year.

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