Further snowfall will spread from the west, as another weather front moves eastwards across the UK.
Snow will reach parts of Scotland during Friday morning, and eastern parts during the evening, likely to clear these eastern areas by the early hours of Saturday.
4 to 8 cm is likely quite widely within the amber warning area, with a low risk of more than 10 cm locally even on lower ground.
Further north, accumulations of 10 to 20 cm may occur in some upland areas.
Strong winds will also lead to drifting and blizzard-like conditions, particularly over higher level roads in the north.
The public should be prepared for likely disruption, particularly to travel.