A tropical low moving south toward New Zealand is expected to bring strong winds and heavy rain to parts of the country later this week, with forecasters issuing weather watches for several regions. Authorities are urging residents in northern areas to prepare for possible flooding, hazardous driving conditions, and potential power outages as the system approaches.
Weather Watches Issued for Northern Regions
Coromandel Peninsula and Bay of Plenty
Heavy rain watches have been issued for the Coromandel Peninsula and western Bay of Plenty as the tropical low approaches the upper North Island.
Forecasters say areas west of Kawerau could experience periods of intense rainfall, including localised downpours. According to MetService, there is a moderate likelihood that the current watch could be upgraded to a formal warning if rainfall intensifies.
The Coromandel Peninsula, known for its steep terrain and coastal communities, is particularly vulnerable to surface flooding and slips during prolonged heavy rain events.
Strong Winds Expected in Northland
A strong wind watch has also been issued for the Far North District, covering the period from 1pm to midnight on Wednesday.
MetService warns that gale-force winds are possible, with a moderate chance the watch may be upgraded to a warning if conditions worsen.
Civil Defence Northland has advised residents to take extra care when travelling and to ensure households are prepared for potential disruptions. Strong winds can bring down trees and power lines, particularly in exposed coastal areas.
Officials recommend securing outdoor items and checking emergency supplies in case power outages occur.
Tropical Low Forecast to Reach Auckland
From Thursday, the tropical system is expected to track further south and reach the Auckland region.
As the country’s largest urban area, Auckland often experiences significant impacts during severe weather events, particularly from strong winds and heavy rainfall affecting transport networks and low-lying suburbs.
Forecasters say conditions may deteriorate during Thursday as the low moves closer, bringing gusty winds and periods of rain across the upper North Island.
Separate Weather Front to Impact Fiordland
Heavy Rain and Strong Northwesterlies
While the tropical system approaches from the north, a separate weather front is forecast to move onto Fiordland in the southwest of the South Island.
MetService has issued a heavy rain watch for Fiordland west of the Lakes from 9pm Thursday through to 5am Friday.
The region is expected to experience strong northwesterly winds along with sustained rainfall. Fiordland frequently records some of the highest rainfall totals in the country, and additional heavy rain can quickly swell rivers and streams.
Forecasters say there is a moderate chance the watch could be upgraded to a warning as the system develops.
Rain Likely Across Much of the Country by Friday
By Friday, the remnants of the tropical low and its associated weather front are expected to move across the northern half of the North Island.
At the same time, the front currently affecting Fiordland is forecast to shift northeast across the remainder of the South Island.
MetService says confidence remains mixed regarding rainfall totals in some areas.
“There is low confidence that warning amounts of rain will accumulate from Northland through to Taupō, also northern Gisborne/Tairāwhiti, and from northwest Tasman to Westland,” the agency said.
However, there is moderate confidence that rainfall levels could reach warning thresholds in:
- Coromandel Peninsula
- Bay of Plenty
- Fiordland
These regions could see the most significant impacts from the combined weather systems.
Conditions Expected to Ease by Saturday
Forecasters expect rainfall to gradually ease across the country by Saturday morning as the weather systems move away from New Zealand.
Despite the improving outlook, authorities are encouraging residents to monitor updates from MetService and local Civil Defence offices throughout the week, particularly in regions under watches.
Changing conditions and saturated ground in some areas mean even moderate rainfall could lead to localised flooding or slips.
Conclusion
As a tropical low approaches New Zealand and a separate front moves onto the South Island, several regions are bracing for strong winds and heavy rain through the end of the week. While uncertainty remains around the exact rainfall totals in some areas, forecasters say the Coromandel Peninsula, Bay of Plenty and Fiordland are most likely to experience significant impacts before conditions begin to improve heading into the weekend.
Alexander Donovan writes for News Collective, covering news, politics, business, technology, sport, entertainment, and lifestyle. He focuses on clear, reliable reporting and useful information, helping readers stay informed about current events, emerging trends, and stories that matter.