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Police received two calls for help about 9pm and used 4WDs to rescue stranded motorists, saying there were reports of two campervans and up to 15 more vehicles affected.
Contractors were out gritting the Crown Range on Sunday morning, the Queenstown Lakes District Council said, and motorists were advised to watch their speeds and following distances as ice and snow were still an issue.
Ice had also been reported on the Lindis Pass and this had been gritted.
The rest of the roads in the region were wet following Saturday night's downpour and road users were warned to watch for ice.
Meanwhile, the Milford Road on State Highway 94 (Hollyford Valley Road Intersection to Chasm Stream Bridge) had reopened by 3pm on Sunday after closing nearly 24 hours earlier due to snow, the New Zealand Transport Agency advised.
At Porters Pass in Canterbury, snow was expected until Monday afternoon. MetService said 20cm to 30cm was expected to settle on the road above 800 metres and lesser amounts further down.
On Arthur's and the Lewis passes, rain was forecast to turn to snow overnight, with between 4cm and 8cm expected to settle by Monday morning.
Snow showers have also been forecast for the Lindis Pass.
- additional reporting by Paul Taylor