A "500-mile West Beast" brings a "snow bomb" to Britain with 30 cm of snow, 70 mph gales and floods this weekend.
This happens when the Met Office issues warnings of snow, wind and rain, just days after storm Gareth swept the UK.
The huge weather system – shown on a satellite image showing Britain – has been dubbed the "Beast of the West" by The Weather Outlook.
100 snow plows and 1,000 sanders – 500 in the north of England and 500 in Scotland – are waiting to cope with the winter climate of the Irish coast.
Forecaster Brian Gaze said: We are more used to the East Beast, but it is a "West Beast", while the weekend of St. Patrick is marked by whites and failures.
"A heavy snowfall in a few hours is sometimes called a snow bomb because the rapid accumulation of snow always causes immediate displacement problems.
"Large accumulations are possible in some parts of the north. Sunday showers could fall in the form of snow on the heights further south. "
It is likely that eight inches of snow are on the heights, and four inches are possible on the northern low hills tomorrow, said the Met Office.
But Mr Gaze predicted a 34 cm snowfall over the Cairngorms in Scotland and up to 25 cm in the Pennines, based on raw data from the American Global Forecast System.
"Motorists should delay their trip if possible to avoid the adverse effects of gales, snow and possibly flooded roads this weekend," said RAC spokesman Simon Williams.
The Met Office has not yet named the building's weather system – but if it is deemed disturbing enough, it will be called Hannah.
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Yellow warnings against snow, rain and wind were issued – with the warning about snow cover in place from 4:00 to 21:00 Saturday.
Heavy rains are expected from Manchester to Newcastle and Snowdonia from midnight to midnight tomorrow.
A few days after storm Gareth devastated the country with winds of 99 km / h, forecasters predicted a heavy snow dump all over Northern Ireland, Manchester, and northern England and Wales. south of Scotland.
The BBC warned that the low-pressure system, brimming with moisture and agitated by icelandic cold air, could be named before the weekend and that the Met Office was not ruling it out.
A spokeswoman for the Met Office told The Sun Online: "On Saturday, the weather will be wet and windy with snow in some parts of the country, and Sunday will be clearer with showers all over the country.
"A developing low pressure zone is going to spread north across the UK until Saturday.
"It will be pretty wet with rain across the country.
"As the band of rain heads north across the country, it will turn into snow.
"At the moment, it could be from a named weather system, that's not out of the question."
Forecasters now predict that heavy rains in the center of the country will disappear from most of the south and south-west.
Heavy and stormy showers in the north could bring snow in the mountains, with strong winds.
Tomorrow, a lot of wind is expected to blow and the rain is expected to spread east, snow coming in from Northern Ireland and Scotland.
Sunday will see some clearings, but also a mix of windy showers with snowy hills further south.
Forecasters urged the British to keep an eye on the warnings, suggesting that a weekend storm could be named if a warning is raised to the orange.
Eleanor Bell, a meteorologist at The Weather Company, told The Sun Online: "The week and the weekend, the situation will be very unstable, with deep or active low pressure zones causing repeated rain and wind conditions.
"Persistent and often abundant rains will bring a threat of flooding, especially in the west, and snow for the Scottish Highlands."
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Gareth was the largest named storm affecting Great Britain since Storm Doris on February 23, 2017, as shown by the Met Office.
Gareth suffered an "explosive cyclogenesis", which became what is called a meteorological bomb, while his atmospheric pressure dropped by more than 24 milibars in 24 hours.
Three mountaineers died Tuesday after being caught in an avalanche in Ben Nevis, the highest mountain in Britain, following heavy snowfall in Scotland.
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