Rainfall

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Southwest Pacific Tropical Cyclone Outlook: Near-normal season expected, but with increased activity west, reduced activity east

NIWA meteorologist Seth Carrier outlines the likely path of Cyclone Cook, which is gaining strength in the Pacific.

The Tropical Torrent that spread over New Zealand this week, produced up to three times the normal April rainfall for some locations in three days, NIWA forecaster Ben Noll says.

After thrashing Australia, what’s left of ex-Tropical Cyclone Debbie is forecast to slowly move across the Tasman Sea over the weekend and soak New Zealand next week.

Our work

Climate Present and Past is a core-funded project under NIWA's National Climate Centre. It aims to explore historical climate data and track past changes in climate through a range of approaches.

Latest videos

NIWA 2017 Annual Climate Summary

Chris Brandolino (Principal Scientist - Forecasting) presents the 2017 Annual Climate Summary. See the detailed Annual Climate Summary.

HIRDS is a simple online tool that can estimate the magnitude and frequency of high intensity rainfall at any point in New Zealand.
NIWA 2017 Annual Climate Summary

Chris Brandolino (Principal Scientist - Forecasting) presents the 2017 Annual Climate Summary. See the detailed Annual Climate Summary.

Southwest Pacific Tropical Cyclone Outlook: Near-normal season expected, but with increased activity west, reduced activity east.

Southwest Pacific Tropical Cyclone Outlook: Near-normal season expected, but with increased activity west, reduced activity east

Co-innovation and Water Management

Rainfall in many irrigated regions of NZ is uniformly distributed (in time) and, theoretically, irrigations could be scheduled based around forecast rainfall. However, in the absence of easy access to reliable rainfall forecast information, farmers seldom irrigate based upon forecast, often irrigating right before significant rainfall events, resulting in the loss of water and nutrients from the root-zone, either by drainage and leaching, or via overland flow.

NIWA meteorologist Seth Carrier outlines the likely path of Cyclone Cook, which is gaining strength in the Pacific.

The Tropical Torrent that spread over New Zealand this week, produced up to three times the normal April rainfall for some locations in three days, NIWA forecaster Ben Noll says.

After thrashing Australia, what’s left of ex-Tropical Cyclone Debbie is forecast to slowly move across the Tasman Sea over the weekend and soak New Zealand next week.

As the Tasman Tempest headed east off New Zealand today, it’s time to look at the statistics and see how many records it washed away.

NIWA meteorologist Ben Noll says parts of the upper North Island have received more rain in two days than normally falls for the entire month.

Near average tropical cyclone numbers for the remainder of the season.
The intense low pressure system that developed in the Tasman sea late yesterday had become as strong as a category 2 tropical cyclone by 8am today, says NIWA meteorologist Ben Noll.
A dry end to the year with average to below average temperatures.
At a rough count, 700 million litres of rain runs off the nation’s roads every year. That’s enough water to fill almost 300 Olympic-sized pools.
Climate Present and Past is a core-funded project under NIWA's National Climate Centre. It aims to explore historical climate data and track past changes in climate through a range of approaches.

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