But now the yellow warning has been extended until 10am on Monday, with ice on roads, pavements and cycle paths likely either where melted snow refreezes or where further wintry showers occur causing unsafe travel conditions, mainly in the east of England and Scotland.
The Met Office warns of slips and falls on icy surfaces as "strong easterly winds will lead to some temporary blizzard conditions and drifting of snow". "Marked wind chill will be another feature of the weather".
A Met Office weather warning for snow and ice in Lincoln this weekend has been increased in severity from yellow to amber.
The Met Office warnings for snow and ice begin at 6pm on Friday for eastern Scotland and England, and run into all of Saturday, where nearly the entire country is included.
Britain is on amber alert for more snow and ice this weekend as a mini "Beast from the East" puts spring on hold and sees winter returning with a vengeance.
"A lot of people can be out and about, they've got a lot to be doing on St Patrick's Day, a lot of things to look forward to", said Adrian Harmon from AA Roadwatch.More news: Irrepressible Ronaldo strikes twice as Real beat Eibar
"It's going to be bitter wherever you are this weekend and for some, there will be some heavy snow as well".
"Not all places will see snow showers but where they do occur they may be organised into bands, resulting in locally 3 to 6 cm accumulating".
St Patrick's Day parades could be hit with a two-inch blanket of snow as another cold snap takes grip, experts have warned.
"Should the small chance of a more organised band of snow affecting the southern and south eastern regions come into fruition, a more widespread 2-5cm could be possible here, with some low level areas seeing 10cm".
A yellow alert for wind in Wales warns of gusts of up to 70mph.
Amber warnings have been issued for tomorrow for the East Midlands, North West England, West Midlands, Yorkshire and Humber, the East of England, London and South East England. "So it will be quite cold".