This incredible NASA photo shows the huge storm about to engulf Britain in two weeks of snow.

The weather system, dubbed Storm Clodagh, is forecast to bring heavy snowfall and winds of up to 100mph to the UK this weekend.

Up to half a metre of snow could fall in Scotland's mountains this weekend while cold air will flood south, according to the Met Office.

The Exeter-based forecaster has issued a yellow weather warning for Saturday and Sunday covering the whole of England and Wales.

Met Office meteorologist Emma Sharples said wind speeds of more than 50mph could be recorded inland and that a showery weekend lay ahead for many.

She added: "The showers will be wintry further north.

"Parts of Scotland will see snow on higher ground, probably above 300 metres."

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Snow and sleet are on the way for UK as we enter December

Separately, Meteogroup forecasts a windy night across the whole of the UK tonight.

A statement from the forecaster read: "Showers will plague many western and northern areas of the country with the driest weather across eastern parts of England.

"Showers towards the north, especially across high ground, will be wintry in nature.

Atlas Photo Archive/NASA
Hidden from view: Storm Clodagh is forecast to bring up to two weeks of snow to the UK 

"During the second half of the night, more persistent rain will move in to many northern and western areas.

"As the rain meets the high ground of northern and central Scotland, so it is likely to fall as snow."

It added that Sunday will be "increasingly" with snow accumulating on the hills later in the day.