The Polar blast will plunge downwards through the United Kingdom later on Thursday when the remnants of Storm Caroline clear the United Kingdom and this will signal an onslaught of bitter weather, including snow, sleet and frost.
Forecasters have warned that Scotland will be battered by gale-force winds and "blizzard conditions" later this week.
A yellow "be aware" warning has also been issued for southern Scotland and the north of Northern Ireland between 6am and 6pm on Thursday.
Forecasts for Thursday afternoon suggest Storm Caroline will bring high winds to the north of Scotland with low tempreatures, snow and ice potentially following on Friday and Saturday.
When the storm eases on Friday, a blast of freezing air from Russian Federation - dubbed the "Beast from the East" - is forecast to send temperatures plummeting to lows of -8C.
Forecasting snow showers in the United Kingdom can be quite challenging as conditions are often borderline between rain and snow.
"Overnight, the main feature will be the increase in wind as Caroline starts to come in towards the end of the night".
Snow and falling temperatures were forecast to affect the west of the country then.
"Gusts of 60-70mph are expected quite widely, with gusts to 80mph possible near north-facing mainland coasts and across the isles".
Disruption to travel is likely, with rail and ferry cancellations possible.
Met Éireann says scattered snow showers will occur from late Thursday and into Friday. Some short-term loss of power and other services is possible.
It will take effect from 4pm tomorrow, with snow expected on higher ground in the Midlands.
Government forecasters expect this month to be hit by easterly winds, which frequently come from as far away as Russian Federation and Siberia to bring Britain's coldest winter weather.
Coastal routes, seafronts and coastal communities are likely to be affected by spray or large waves.