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Dunedin residents are being warned to expect traffic disruptions in the hill suburbs as the MetService warns snow could fall to 200m in the city.
MetService meteorologist Brian Mercer said a front was expected to arrive on the Southland coastline about 1am tomorrow, bringing heavy showers and snow down to 200m as it moved up the South Island.
"Because they're showers, they're not going to be absolutely everywhere. Most people will see snow around the hills but we can't guarantee everybody will get snow.
"The colder stuff will be during the morning and early afternoon, and then it will ease in the late afternoon, into the evening.''
He said driving conditions about the region, particularly around the hill suburbs of Dunedin, could be slippery and cause disruptions to traffic.
He said snow showers were expected to affect the Northern Motorway between Dunedin and Waitati tomorrow, from 6am to 6pm, and up to 2cm may accumulate near the summit.
In Central Otago, up to 2cm of snow was expected to accumulate on the Lindis Pass (SH8) from 4am to midnight tomorrow, and on the Crown Range Road from 1am to 6pm.
Snow showers were also expected to affect the Milford Road tomorrow, between 3am and 9am, and up to 2cm was expected to accumulate on the road above about 400m.
He said Saturday would start off dry but more showers were forecast for the afternoon, which could bring snow down to 600m.
"During Sunday, the weather will improve and it should be quite a nice day.''