UK weather forecast: Chart turns BLUE as bitter Arctic air grips Britain in days -new maps

Britain has baked in glorious sunshine throughout May, but the blistering heatwave is expected to come to an abrupt end this week – just days after the country moves into the start of meteorological summer (June 1). Temperatures are expected to plunge as bitterly cold northern air sweeps southwards. Some forecasters claimed multiple regions of the country could expect overnight frost to develop while also warning of “snow over the Scottish mountains”.

And, according to the latest weather charts, temperatures are expected to see a massive tumble this week.

One weather chart, which assesses the temperature anomaly across Britain, turned the whole country blue – which shades of purple, indicating a shift to colder conditions over the weekend – with the bitter polar air appearing to move southwards on Friday 5 June.

The cooler temperatures appear to grip the country throughout the entire weekend.

Forecasters also warn some parts of the UK will be hit by “heavy showers” this week, bringing an end to the dry spell many have enjoyed over previous weeks, in welcome news to some gardeners.

Brian Gaze, from the Weather Outlook, said on Wednesday “showery outbreaks of rain spread southwards across most of the country”.

The forecaster also warned “northern and western areas” may see the showers turn “heavy at times”.

He noted the “South East and East Anglia may remain drier” but suggested there was a “risk of showers breaking out in the afternoon”.

Looking further forward towards the second half of the week, the forecaster said: “Northerly winds bring changeable conditions”.

He added: “Daytime temperatures take a tumble and it will be windy with a risk of gales in the north.

“In sheltered locations, ground frost is possible on some nights.

“Showers are expected and in the north, there could be longer outbreaks of rain with snow over the Scottish mountains.

“By the weekend high pressure may be building back from the west.”

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Temperature charts by Netweather showed thermometers tipping towards 23C in London on Monday and 22C in some parts of Scotland.

But, by Thursday 4 June, the same temperature charts showed only highs of 16C in some parts of Scotland and 15C in the capital – a plunge of around 6C to 8C.

BBC Weather wrote on Twitter: “The temperatures fall from midweek, as northerly winds kick in.”

The Met Office’s long-range chart also notes the bone-chilling air sweeping southwards from the north towards the UK.

Daytime temperatures take a tumble and it will be windy with a risk of gales in the north

Brian Gaze, the Weather Outlook

It’s outlook, from Friday, June 5 to Sunday, June 14, warns of a “shift to a more changeable regime”.

The Met Office forecast says: “Sunny spells and showers are likely across many parts, though the most frequent showers are expected across the north and east, perhaps with a longer spell of rain too.”

It added: “The best of the drier conditions appear to be in the south and west, where there should be a good deal of bright or sunny spells.

“It will be breezy or even windy at times, especially in the east.

“Looking further ahead, there seems to be a continuation of the showery setup at first, although there is considerable uncertainty.

“Longer drier, brighter spells will probably develop towards mid-June, especially across northern and western areas.”

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