Met Office forecast points to heatwave for Flintshire
Temperatures in Deeside are set to climb through the weekend and into next week, reaching a forecast 27°C on Monday.
On current figures, that warm spell could be enough to meet heatwave criteria for the area.
The Met Office is forecasting 25°C on Sunday, 27°C on Monday and 25°C on Tuesday for the area.
In the UK, a heatwave is declared when a location records at least three consecutive days at or above a county-specific threshold.
Across most of Wales, including Flintshire, that threshold is 25°C, which those three days would meet.
That is not certain yet. Forecasts this far out tend to move by a degree or two, and whether each day reaches 25°C will come down to how much cloud there is, so the picture could change before the weekend.
The headline heat is not coming here. The Met Office says temperatures could reach 32°C in the south and southeast of England on Sunday, with the potential for 33°C on Monday.
A Yellow Heat-Health Alert has been issued by the UK Health Security Agency, but it covers only the East Midlands, the East of England, London and the southeast.
UK Health Security Agency heat alerts do not apply in Wales.
The Met Office describes the pattern as a marked north-south split, with high pressure building warm, humid air across southern and eastern areas while lower pressure to the northwest keeps conditions more changeable. The earlier part of the week stays cooler and more unsettled, with the warmth building from the weekend.
The Deputy Chief Forecaster, Gregory Wolverson, set out the contrast.
“This week’s weather reflects a contrast we often see in summer, with more unsettled conditions passing to the northwest of the UK while heat builds in the south and east,” he said.
He added that even where it does turn warm, it may not bring unbroken sunshine.
“It’s important to note that while temperatures may be high, we might not all see the wall-to-wall sunshine and blue skies we experienced back in May because there is more cloud around. There is also a chance of thunderstorms developing in places, particularly later each day, which could bring heavy showers and localised impacts,” he said.
Wales’s highest temperature on record, 37.1°C, was set at Hawarden on 18 July 2022, and the record it broke had also been set in the same part of the county.
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