The Jersey Met Office warned of blizzard conditions, predicting up to 4in (10cm) of snow
Snow, ice and freezing winds are causing travel disruption across parts of the UK, with more expected.
The Met Office has issued yellow "be aware" warnings for snow in the east, south-east and south-west of England, with up to 10cm (4in) predicted in some areas.
Ice will also be a hazard, with yellow warnings in place for most of Scotland.
Guernsey and Jersey airports have shut their runways for the rest of the day due to the snowy conditions.
Schools on the Channel Islands have also been closed and 8cm of snow had accumulated across the islands by 14:00 GMT on Monday - with winds gusting in excess of 50mph. A severe weather warning is place for the region.
The Environment Agency has also put three flood warnings and more than 30 flood alerts in place in England and Wales following overnight rain.
In other developments:
- Transport Scotland warned drivers to take care after a number of accidents on icy roads
- A car flipped over on the A938 near Dulnain Bridge in the Highlands, leaving the driver and passengers with cuts and bruises but no serious injuries
- Commuters on the M6 in Warwickshire faced blizzard conditions, with numerous accidents reported
- Hazardous driving conditions were reported on roads across the country, including the A54 in Cheshire, the A686 and M6 in Cumbria, the A259 East Sussex, and the A68 Northumberland
- Police in Sussex and in Lincolnshire said there had been a number of crashes caused by icy roads
- In Wales, motorists had to put up with snow and strong winds and one lane of the Severn Bridge was closed
- Falling trees blocked a number of Welsh roads, and roads in Newquay, Cornwall and Lynton in Devon
- On the rail network, cold conditions caused signalling problems and there were delays between Grantham and Doncaster; between Hastings, Tunbridge Wells and Eastbourne; between Carlisle, Morcambe and Leeds; through Westbury until further notice; between Horsham and Barnham; between Plymouth, Paignton and Newton Abbot; and between Kirknewton and Edinburgh
- Services between Cheltenham Spa, Worcester Shrub Hill and Birmingham New Street are delayed due to a tree blocking the line
- On the Isle of Wight, the cold weather meant no rail services were operating between Shanklin and Ryde St Johns
- Condor Ferries services between Poole and Guernsey were cancelled by the freezing weather, and TransEuropa Ferries and Stena Line crossings were running reduced services
- Bookmakers slashed the odds for a white Easter as forecasters predicted more snow showers throughout the week
- Snow and surface water from heavy rain caused difficult driving conditions in Norfolk,
- A number of schools across Hampshire and the Isle of Wight were closed due to snow
BBC weather forecaster Steve Cleaton said the snow showers that affected central and northern areas of the UK through the course of Monday would tend to ease off overnight into Tuesday, although some of the higher areas of northern England may well still see a covering of snow.
Many areas of the UK will also see icy patches forming on roads, making driving conditions difficult.
South-east England is also likely to see around 2cm to 5cm of snowfall overnight, with Kent and Sussex the most affected counties.
Temperatures, which have remained close to freezing throughout the day, will plummet to around -2C to -5C in towns and cities and -4C to -6C in rural areas overnight, our forecaster said.
Temperatures of -10C could be seen in Scotland.
The bitterly cold, north-easterly wind will persist across most of England and Wales into Tuesday, he added. But it will ease across Scotland and Northern Ireland.
According to BBC forecasters, the blizzard is expected to continue across the Channel Islands into Tuesday morning.
It is likely to result in a new March snowfall record for Jersey, which has previously seen 9cm of snow recorded in March 1962.
Continue reading the main storyThe RAC said it was expecting call-outs to increase by a fifth over the next few days, with RAC spokesman Pete Williams warning motorists they should "proceed with caution".
He encouraged drivers to leave time to prepare cars by heating them up, clearing windscreens and making sure lights were working.
"Leave plenty of room between yourself and the car in front and beware there may well be occasional stretches of black ice which could well cause you to skid," he added.
The Highways Agency, which maintains motorways and major roads in England, said it had "over 500 winter vehicles - salt spreaders, ploughs and snow blowers - on standby at over 100 depots to help keep traffic moving".
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