Those living in exposed areas of Otago and Southland are being urged to be vigilant over the next few days as severe and "damaging" gales are forecast for the South.
MetService early this afternoon upgraded its wind watch to a warning for Dunedin, Clutha, southern Fiordland, Southland and Stewart Island from 3pm today until 1pm tomorrow, forecasting severe gale southwesterlies gusting to 130km/h in exposed places, mainly about the coast during this afternoon and evening.
The strongest winds were expected overnight Friday and tomorrow morning and spreading over inland areas. Squally thunderstorms were possible near the coast.
Earlier MetService meteorologist Michael Pawley said a strong west-to-southwest flow would affect the country.
"For the lower South Island, these winds drag cooler temperatures, showers, and even snow falling as low as 600m [today].
"This will be welcome news for avid skiers and snowboarders, but is likely to affect alpine roads in the South Island, including Milford Rd, Crown Range and Lindis Pass."
Mr Pawley said the gales would "peak on Saturday morning, so tie down your trampoline and drive carefully if you’re heading away for the long weekend".
People driving high-sided vehicles and motorcycles should take particular care.
Swell time on coastline
Meanwhile, MetService has warned boaties and beachgoers to take care near the water this weekend.
"Large swells build today and Saturday along most coastlines, especially along the western South Island.
"Swell heights may reach six metres (even higher offshore)."
