Some northern and western parts of both islands will continue to be drenched by heavy rain and thunderstorms today, prompting warnings there could be flooding in these areas.
Meanwhile, MetService has lifted heavy rain warnings for parts of the North Island following a week of wild weather.
"A moist northerly airstream will bring outbreaks of heavy rain to parts of New Zealand through until early next week," MetService said.
An orange heavy rain warning remains in force until Saturday for Northland, Mt Taranaki, Tasman, Nelson, Marlborough and Westland. Meanwhile, a heavy rain watch remains in place for Buller until noon on Sunday.
MetService noted there is a possibility the orange warning for Nelson/Tasman may be upgraded to a red heavy rain warning on Friday.
MetService on Thursday night reduced the expected impacts of the heavy rain warning for Marlborough. The warning's expected duration has decreased from a 42-hour period to 29 hours from 7.00 am Friday. The forecast in the Richmond and Bryant ranges decreased to expected falls of 150 to 250mm, with 100 to 150mm forecast for elsewhere in Marlborough.
Marlborough Civil Defence and Emergency Group Manager Brian Paton said it was relatively good news, but people should still take care.
"The rainfall will cause streams and rivers to rise. Surface flooding and slips are also possible and driving conditions may be hazardous," Paton said in a statement.
"Everyone can do their bit by checking the drainage around their home and clearing leaves from gutters and drains."
The weather could cause travel disruptions between Marlborough and Nelson, as rivers in the area could flood.
Drivers should keep up to date via the Waka Kotahi website or Facebook page. People can also keep an eye on the Council's Facebook and Floodwatch pages. Floodwatch helps you judge if there is a flood risk in your area. The Floodwatch map displays current rainfall, river flow and river level data from monitoring sites around Marlborough.
The warnings come after wild weather earlier in the week left people trapped, townships cut off, homes without power, endangering animals and causing surface flooding.
