Cold air sweeping in from the Arctic is set to bring ice and wintry showers to the north as the Met Office issued a yellow weather warning for this weekend.
The chilly snap will bring an end to the largely mild start to autumn, with people advised to dig out their warm winter clothes.
The weather warning, from 1am to 10am on Saturday morning, advises there is a risk of "ice on untreated roads, pavements and cycle paths, leading to an increased risk of injuries and accidents."
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Met Office meteorologist Aidan McGivern said: "It will be a fairly chilly start, with temperatures widely close to freezing and that means you'll perhaps have to scrape your car windscreen and you'll see a frost in place first thing."
He warned that "snow building up over the higher routes" could be an issue on Saturday.
Yellow Warning of Ice for Northern Ireland https://t.co/3gqYzITjj4 pic.twitter.com/dK8cYQg8kS
— Met Office warnings (@metofficeNI) October 26, 2018