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Temperatures plummeted to the coldest on record for November in parts of the UK overnight.Northern Ireland reached a new low of -8.6C (17F) at Aldergrove, in Belfast, and in Wales,Heavy snow is still falling in much of Scotland and north-east England, bringing travel disruption, and is set to last until Tuesday.Forecasters says Siberian winds from Monday will make it feel even colder.Met Office severe weather warnings for heavy snow and widespread ice remain in place for eastern Scotland, and north east England, down to Yorkshire and Humber.Although there will be some sunshine in many parts of the UK, including East Anglia and North Wales later on Sunday, Northumberland, Durham, Nottingham and the Chilterns are set to get further snow showers.There could also be flurries of snow on Sunday in Northern Ireland, north Norfolk and the southern-most counties of England.BBC weather forecaster Alex Deakin said 10cm (4in) had fallen in Aberdeenshire in just two hours on Sunday morning, with a further 15-20cm (6-8in) likely in Fife, Perth and Kinross and Angus in the next few hours.That follows up to 40cm (16in) in parts of north-east England and Scotland on Saturday - said to be the most widespread snow at this time of year since 1993.The coldest place in Scotland overnight on Saturday was Loch Glascarnoch, in the Highlands, at -15.3C (4F).Drivers are being urged to take care in the worst-hit areas and to travel only if necessary. The M9 in Stirling and the A1(M) in County Durham are particularly hazardous.Norwich, Inverness, Newcastle, Luton and Durham-Tees Valley airports all experienced disruption to flights on Saturday, with problems continuing at Newcastle on Sunday.In Jersey, a lightning strike disrupted radar equipment, on Saturday, and on Sunday disruption continued because of snowfalls overnight.Several weekend race meetings were called off, as are Monday's events at Ffos Las, in Carmarthenshire.Scotland's Alba Cup final, Dundee United's Premier League game against Rangers, and several FA Cup second round fixtures were also called off.Newcastle United drafted in extra staff to clear their pitch ahead of Sunday's clash with Chelsea. The club says the game will go ahead unless there is significant further snowfall during the morning.A spokesman for Northumbria Police warned: "Anyone going outside should consider whether their journey is critical and if they must venture out should dress appropriately."Motoring organisation the AA said it had dealt with 10,400 breakdowns by Saturday afternoon and expected 15,000 by the end of the day - 80% higher than a normal November Saturday.A man died after jumping into the icy River Lune in Halton in Lancashire on Saturday in an attempt to save his pet springer spaniel.