Drivers are warned that ice is likely to form on untreated roads this evening and through the weekend as temperatures tumble.
The yellow alert from the Met Office is in place from 4pm today through until Saturday afternoon.
An alert is also in place for snow on Sunday and Monday.
The Met Office said: "Icy stretches are likely to form on untreated surfaces on Friday evening, overnight and into Saturday morning. In addition, further accumulation of snow are likely on high ground. The public should be aware of the risk of difficult driving conditions.
The chief forcaster put the chilly conditions down to a swift fall in road surface temperatures to below freezing on Friday evening and overnight into Saturday.
Adding: "A mixture of rain, sleet and wet snow is likely, with most of any settling snow taking place above about 200 metres. However wet roads at low levels will contribute to the risk of ice formation."
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