The Met Service has warned of possible severe storms for parts of New Zealand and heavy rains for the West Coast.
It is forecasting a front on the South Island late Thursday and Friday that will bring northwest storms and torrential rains to western areas, including Otago and Canterbury Headwaters.
A spokesman said severe northwest storms were expected in many exposed parts of the southern island, especially in the east, where damaging gusts were possible over Canterbury High on Thursday night and Friday morning. Severe northwest storms were also expected over the central and lower northern islands.
It also issued a severe storm alert from Jackson Bay to Crimea for Thursday, with waves rising to 7 meters on Wednesday but falling to 4 meters on Thursday.
Dangerous coastal conditions were expected and extra precautions were recommended around the coast.
* Stormy weather week brings heavy rain, less snow, storms and dangerous seas.
* Heavy rain up to 130 km per hour in south and central areas
* Weather warnings in the form of heavy rains, 120 km per hour is ready to sweep the country.
The Met Service was also warning of heavy rains, causing canals and rivers to overflow. Superficial flooding and slipping were also possible as were dangerous driving conditions.
Westland, south of Otera, is expected to receive 120 mm to 160 mm of rain in 25 hours from 10 a.m. Thursday to 11 a.m. Friday.
Strong wind warnings were issued for Canterbury, Southland, Otago, Marlborough, Wellington and Virapa, with gusts of 120 to 140 kilometers per hour expected on Thursday and Friday.
Strong winds can damage trees, power lines and unsafe structures. A spokesman said driving could be dangerous, especially for high-speed vehicles and motorcycles.
A strong wind clock has been issued for Nelson, Christchurch and Fairland, west of Tai Hop, Motuoka, with the potential for strong winds to reach open storms.
Heavy rain was forecast for Canterbury Lakes and River Heads south of Arthur Pass, with 160 mm of rain expected in 13 hours from 10pm on Thursday night to 11am on Friday. This will bring heavy rainfall over the waters of Otago lakes and rivers up to 140 mm.
Blair and Westland, north of Otera, were under heavy rain on Friday, with heavy rain expected.