The Met Office has said that a third heatwave will hit the UK by the end of the coming week, with temperatures possibly reaching the low 30s.
Temperatures will reach 25-28°C on Wednesday, and potentially 30°C by Friday and Saturday with very high pollen and UV levels across multiple parts of the country.
This renewed heat follows a weekend of cooler air, cloud and rain in most of England, and a yellow warning for thunderstorms in the east of the country on Sunday.
Marco Petagna, senior meteorologist at the Met Office, said: “Wednesday is probably going to be the day when we could start to reach the thresholds of 25 to 28 degrees, depending on where you are.
“Although the temperature will be reaching the criteria, we won’t reach an official heatwave until around Friday, to give the three consecutive days at those temperatures.”
What is the definition for a UK heatwave?
According to the Met Office, the UK heatwave threshold is met when a location records a period of at least three consecutive days with daily maximum temperatures meeting or exceeding the heatwave temperature threshold.
The threshold varies by UK county. The geographical differences reflect the differences in climate across the country.
The threshold temperatures have been calculated using the 1991-2020 climatology of daily maximum temperature at the mid-point of the meteorological summer (15 July).
The Met Office forecast currently shows a top temperature of 28°C on Friday from the very south of England running up through the centre to York, with temperatures in the mid-20s continuing right up to the northern points of Scotland. However, predictions are likely to increase closer to the time.
“Temperatures are going to continue to climb as we go toward the end of the week, and certainly by Friday and Saturday, we could see 30 degrees, perhaps just nudging into the low 30s,” said Mr Petagna.
“At the weekend, we could just start to see humidity increasing along with nighttime temperatures, so it will be starting to become more uncomfortable at night.”
It is unclear how long the heatwave will last and how high temperatures will go, but the UK will at least avoid the stifling weather of the high 30s and low 40s seen in the Mediterranean.
Although figures may be revised, for cities such as London, the BBC weather forecast is predicting up to a week of warm weather starting from Tuesday, and is replicated in Bristol, Leeds, Exeter, and Birmingham.
On predictions, Mr Petagna said: “Some weather models are pushing the heat away a bit more quickly, whereas others keep the heat going.
For multiple cities the weather is set to spike from Tuesday onwards (BBC)“At this stage, it looks as though, certainly into next weekend, we should hold on to hot weather across the south of the UK and temperatures could again get into the low 30s in a few spots.
“We are going to see some very high pollen and very high UV levels as well but, at this stage, we’ve managed to escape some of the very highest temperatures, those seen across Spain and Portugal in particular, where it has reached the mid-40s.”
Looking ahead after next week, temperatures are set to be slightly but remain in the high 20s for multiple areas up until Tuesday.
Four things you should do in a heatwave – and three you should never do
What to do:
Do take warm showers Do wear sun cream Do stay hydrated Do think about bedtime routineAnd what you shouldn’t do:
Don’t ignore symptoms of illness Don’t leave pets outside or unattended Don’t push yourself during peak heat hours Read More Details
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