The weather service warned that whiteout conditions are likely with near-zero visibility because of blowing, drifting snow.
Drifting snow and surface water are continuing to cause problems on roads across the Isle of Man.
Drifting snow closed the A939 Ballater to Corgarff road and the A941 Dufftown to Rhynie road at Cabrach.
The A628 in South Yorkshire was also closed for several hours while Highways Agency contractors cleared the drifting snow.
Drifting snow was also causing problems on north east roads, forcing some closures.
In the Scottish Borders, gritters had been out in force but the council said some priority routes remained single-track due to drifting snow.
"On Exmoor there's a lot of snow drifting around and some roads are still impassable, " he said.
The spokesman added that the wind was "continuing to cause problems in exposed areas with snow drifting from the adjoining lands".
Three foot of snow everywhere and drifting to seven feet in places.
For the Highlands and Grampian, as well as Tayside and Central, forecasters said ground above 250 metres would see fresh accumulations of snow, possibly 5cm to 10cm over higher parts, with severe drifting in the northerly gales.
The Roads Service said heavy snow accumulations have particularly affected the north east of Northern Ireland, with drifting of up to 40cms reported.
The Met Office has issued a severe weather warning for South East England for Friday, warning of snow throughout the region - including much of East and West Sussex - and a danger of some drifting.
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