On Saturday and Sunday parts of Yorkshire could see blizzard conditions as heavy snow is blown in on strong winds.
An amber alert has now been issued for ice, along with a yellow weather warning for snow.
At least two inches of snow is expected at lower levels with up to eight inches of the white stuff over higher ground.
A specific weather warning has also been issued for Leeds and for Sheffield.
The worst snow is likely to be on high ground in parts of North Yorkshire and on the coast, such as Whitby and Scarborough.
Snow to cause travel delays
People are being warned that travel delays are possible and vehicles could become stranded.
The warning is in force for the hours between 12pm on Saturday and 10am on Sunday.
A yellow warning for ice has also been issued alongside an amber alert for ice.
The northern half of the UK has been told to expect the first major snow storm of the winter
The snow warning states: “There is a risk of snow developing with strong southeasterly winds affecting northern UK on Saturday afternoon into Sunday morning.
“The snow could be heavy at times, especially over hills where blizzards may develop, and is likely to drift in strong winds.
“Across northern England and southern Scotland, snow may turn to freezing rain above 200-300 metres leading to widespread ice developing on Saturday night. 2-5 cm of snow is likely at lower levels, whilst higher ground could see 10-20 cm.”