The UK is bracing for a bitterly cold freeze as the latest turn blue and falls across several regions.
from WXCharts suggest temperatures could plunge to as low as -8C on November 20.
Areas around Fort Williams, Wick and Inverness in Scotland are likely to be the worst impacted, according to the latest data.
However, the will engulf the entire country as even southern areas of England could see the mercury dip below freezing.
Weather maps also show snow falling across much of Scotland as early as November 16 before spreading south into an area between Manchester and Newcastle on November 20.
Brian Gaze, founder of The Weather Outlook, told Express.co.uk: "There are indications of it turning colder after mid-month. It would bring the potential for snow to northern regions, particularly higher ground. Given the recent mild weather, such a sudden shift would mark a stark contrast and a surprising early taste of winter."
Jim Dale, a weather expert from British Weather Services, said: "There are some signs from November 17/18, in a much colder northerly airstream.
"It is more likely for the Highlands & Grampians, maybe a few flurries down the eastern flank of the country from November 19-21. It is all speculative but the conditions have been confirmed over 3-4 model runs now.
"After that, sheer potential luck but far more likely January/February than November/December. Short chaotic bursts rather than anything overly prolonged. The snow conditions are possible north far more likely than the south."
The Met Office's long-range forecast between November 13 and 22 reads: "High pressure from early in the week likely reducing its influence during the middle of next week though to an uncertain degree.
"Likely turning cloudier again across many areas with a chance of showers or longer spells, most probable in parts of the north and east.
"Southwestern areas have the greatest chance of maintaining largely dry conditions. Temperatures around average but with a greater chance of mild conditions in the northwest and below average temperatures in the southeast. During next weekend and into the following week there are signs that the influence of high pressure will decline to the west.
"This means northern and eastern areas remain most likely to see more unsettled conditions. This also increases the likelihood of a spell of northerly winds and colder conditions."
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