MET Eireann has issued a fresh weather advisory for 14 counties as St Patrick's weekend will see Ireland hit by snow and extremely low temperatures.
The Met Office has issued a yellow weather warning for snow and ice from 6pm today until 11.55pm on Saturday.
The Met Office warnings for snow and ice began at 3am today for central Scotland and the North East, expanding to cover more of England tomorrow.
"The last couple of days have been quite mild across parts of the United Kingdom - we got to around 16C yesterday in Wales - but by tomorrow all of us will be back to very cold weather".
"Bitterly cold is the best way to describe it. Temperatures on the..."
However, now Saturday's yellow warning for snow will last from 5pm until 10am on Sunday morning. Any melting of lying snow will lead to an ice risk on untreated surfaces on Saturday morning and night.
The so-called "Beast from the East, 2.0" is set to bring Spring crashing to a halt on Friday Evening.
Richard Leonard, Highways England Head of Road Safety, said: "Gritters will be out treating our roads around the clock, but it is still important to drive to the conditions when snow is forecast". Injuries from slips and falls on icy surfaces are also possible.
ROMSEY could be covered in snow once again this weekend.
"But increasingly tonight we will see it turning more into sleet and then snow across parts of eastern England and eastern Scotland".
Issued at 9:00am this morning, the warning is now valid until midnight on Sunday, March 18.
Conditions are "extremely unlikely" to get as fierce as a fortnight ago, when some areas had 19in of snow, 20ft drifts left villages cut off for a week, thousands of schools closed and hundreds of flights were cancelled.
Forecaster Craig Snell said the cold snap will only last a few days, and with a high of 15.9C on Thursday, he warned many places in Britain over the weekend will be nearer to freezing.
"There is a chance some rural communities will be cut off". Blustery easterly winds will add a significant wind chill.
The weather warning comes just two weeks after West Fife was hit by the "Beast from the East". Up to 10cm of snow is expected for these regions.