A ‘snow bomb’ is expected to bring 10cm of snow to Britain as early as next week, meteorologists say.
The possibility of snowfall as early as March 21, after a fast-moving snow system passes over Scotland and into England, Netweather said.
That means around 10cm of snow could fall across Britain, the Express reports.
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The Scottish Highlands are expected to gain around 100mm (4 inches) of snow from 6pm Monday, with two slabs of 65mm and 75mm (2.5 to 3 inches) at the southern border and over Yorkshire.
Northern Ireland could also see coverage, but more limited to around 35mm (1.3 inches) over the northwest.
A tight cluster of snow showers will stick to the mountains and northernmost parts of Scotland first.
On Tuesday morning the snow will start to move further south, concentrating in northern England between Sheffield and Edinburgh.
The Scottish Highlands remain at high risk of snowfall as totals remain around 100mm, mainly over the Cairngorms.
Cover extends as far south as Wales at this point, again at the higher elevations of Snowdonia National Park, where depths can reach 65mm.
By 3am on March 22, the snow left Scotland completely, sticking to Wales, the Midlands and Yorkshire.
The system should then cover most of Wales with depths of 65mm (2.5 inches), but with the most snow in and around the Lake District.
Totals should reach 90 mm (3.5 inches) at most, but remain between 70 mm and 85 mm (2.7 and 3.3 inches) close. By mid-morning on March 22, around 9 a.m., the snow will spread furthest south.
Totals between 25mm and 55mm (1 and 2 inches) will dominate a sliver of southeast England between London and Peterborough, with 20mm (0.7 inches) around Norwich and Hull.
Snow depths will increase further north, extending around the North West and Wales.
Netweather has drawn red dots around higher ground in Wales and northern England, where snow could accumulate up to 70mm (2.7in).
In Sheffield, the system could add a further 15mm to 20mm (0.6 and 0.7 inches), bringing the depth to 70mm and 75mm (2.7 to 3 inches).
A spiral formation of persistent heavy snow will gradually move north after appearing around the Balkans next week, with its unusual route to the British Isles also seeing it move through the Alps.
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The flakes will eventually make landfall in the northeast on March 22, before a broader front hits the south coast of England in the early hours of March 23.
On the second day, accumulations of 2cm per hour will be possible in Kent and parts of the South West.
Ahead of that, a few isolated patches of snow are also expected to appear in northern Scotland as early as Sunday, with heavier snowfall coming next Wednesday.
BBC Weather’s Tomasz Schafernaker also said “changeable” and at times stormy weather can be expected throughout the mild weekend.
What will the weather be like in Hertfordshire next week?
Hertfordshire is expected to be particularly mild and ‘settled’, with a few rain showers. It should be sunny with light winds on Tuesday (March 15) and more cloudy on Wednesday with bouts of rain.
The weather is expected to become drier from March 16 to 25, with “warm” temperatures.
Some mist and fog patches are likely early inland, and some low cloud around the east coast.
Thereafter, the weather front should slowly clear with the formation of anticyclones.
The sunniest weather is expected to be in the south and east, with a chance of frost and fog overnight, according to the Met Office.
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