Up to six inches of snow is expected to fall in parts of Britain tomorrow and motorists have been warned to expect hazardous driving conditions.
Snow showers are set to hit the Midlands, northern England and Scotland over the next 24 hours.
Northern Ireland and parts of Wales will also be affected, according to MeteoGroup, the weather division of the Press Association.
A weather system sweeping in from the west later this evening and moving eastwards over the course of the night will bring up to six inches of snow on higher ground, and between one and two inches in lowland areas.
Tonight will see widespread frost and below-freezing temperatures across the country, reaching a low of minus 10C in parts of Scotland.
The weather is expected to create dangerous driving conditions for tomorrow morning's rush hour, with slippery roads and poor visibility.
MeteoGroup forecaster Paul Mott said: "In Scotland and the far north of England the snow will be very slow to melt, lying there for a couple of days at least.
"Driving conditions will be fairly hazardous tomorrow morning. There will be a strong to gale-force south-easterly wind, creating the risk of drifts."
Most of southern England will escape the worst of the weather. Some sleet and light snow is possible on higher ground, but is not likely to settle.
It will be a wet start for London and the south of England, with moderate rain and the occasional heavy shower clearing up over the course of the day.
After a chilly start, milder air will come in from the west, lifting temperatures to 3-4C in Scotland and 10C across southern England.
Much of the snow is expected to clear up by Friday, although some may remain on higher ground. Most of the country will have an unsettled day, with showers likely in western coastal areas.
The AA warned motorists to drive carefully in the difficult conditions.
It advised those travelling to work by car to keep to main roads and only to drive as fast as conditions allowed.
Food, blankets, a hot flask and a fully-charged mobile should be carried in case of breakdown.
The Association's president, Edmund King, said: "Commuters can help themselves by checking information on the local weather and travel situation, following practical tips like not leaving your car on a sloped drive overnight, and thinking about walking or using public transport if practical."Reuse content