A record-breaking start to May was followed by slightly cooler conditions over the last week.
That trend looks set to continue into at least the first half of next week, with increasing humidity heightening the risk of thunderstorms.
“From Saturday night, into Sunday morning, there is an increasing chance of rain, showers and isolated thunderstorms moving northwards across the southwest of the UK,” he said.
“On Monday itself, we could see some particularly vigorous thunderstorms developing, most likely in Wales and parts of southern England, whilst elsewhere during this whole period, dry, fine, and increasingly warm conditions are expected.”
Such forecasting remains uncertain, he said, advising that the public stay up to date with any Met Office updates and potential severe weather warnings throughout the weekend.
On Monday, meanwhile, the mercury is expected to reach 27°C in parts of the Midlands and up towards Manchester, but a few other regions across the UK should reach the mid-20s again.
There water companies, Yorkshire Water, United Utilities and Severn Trent, have already implemented the first stages of their drought contingency plans, as fears of hosepipe bans increase.
This threshold varies by county, and is set at 25°C for Scotland, Northern Ireland, most of Wales and parts of northern and southwest England.
The heatwave temperature threshold is highest in an around London, set at 28°C.
UK temperature threshold map by county (Photo: Met Office)There’s no official definition of a mini-heatwave, but the Met Office forecast predicts that temperatures in parts of the UK could reach or surpass some of these thresholds at some point in the coming days.
Five-day forecast
Saturday should be “another fine, warm and dry day for most,” according to the Met Office’s latest forecasts. The far southwest, and the northwest of Scotland, might receive more clouds and a few showers, with risks of thunderstorms developing later in the night.
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It should be “dry, warm and sunny” elsewhere, the forecaster said.
Unsettled conditions are predicted to ease through Tuesday, though, before a return to “fine and settled” weather on Wednesday, with the rest of next week expected to bring “dry and largely sunny conditions” to the vast majority of the UK.
Beyond this, the Met Office added: “There is an increasingly likelihood that conditions could turn wetter and more unsettled as areas of rain, stronger winds, and possibly thunderstorms begin to approach from the west and/or south.
“Winds will mostly be light otherwise, with daytime temperatures generally above average throughout although there is a chance of some chilly nights in places.”
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