"Northern England and Wales will see increasingly light and patchy snow clearing to central England on Tuesday morning, with a few wintry showers following".
The Met Office warning states: "A spell of rain, quickly turning to sleet and snow, will move southeast across the United Kingdom on Monday night and Tuesday, gradually weakening across England and Wales".
A raft of yellow "be aware" alerts will come into effect in Wales, Northern Ireland, north west England, north east England and Scotland from 8pm tonight until 9.30am on Wednesday.
"There will also be 20 to 40cm [15.7 ins] of lying snow in the Cairngorms and -15C (5F) is certainly possible, there is around a five-per cent chance of reaching this temperature".
It comes as the Met Office has said more snow could hit Kent this week.
He said there could be between 4cm to 7cm of snow, but many areas would get no snow at all.
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Hannah Findley, forecaster for The Weather Channel, said: "We are now forecasting lows of -12C (10.4F) for Tuesday night in the Scottish Cairngorms, but this will feel like -19C (-2.2F) in the wind chill".
However, widespread showers are expected to cross the country from the east from the afternoon through the evening.
The second snow and ice warning inside 24 hours was issued between 4am on Tuesday morning and midnight, with commuters told to be careful on the way to and from work. This will allow temperatures to take a late dip which will lead to icy patches.
Gardaí are warning about "hazardous conditions on roads and footpaths" after a national yellow weather warning warning was issued for snow and ice.
The warning says: "There is a 90% probability of severe cold weather, icy conditions and snow between Sunday and Friday".
Daytime temperatures will widely hover around low single figures through this week with rural spots unlikely to lift above freezing.