A New Zealand-led team has completed the fullest investigation to date into January’s eruption of the underwater Tongan volcano. Hunga-Tonga Hunga-Ha'apai (HT-HH) emitted the biggest atmospheric ...

The website Ian Wishart has based his opinions on is not New Zealand’s national climate database. Wishart has conflated the Historic Weather Events website with the New Zealand National Climate ...

Tropical cyclone outlook summary for New Zealand. On average, at least one ex-TC passes within 550 km of New Zealand each year. This season, the risk is considered normal-elevated.; If an ex-TC tracks ...

Floodwaters surround farmhouses. Urgent need for national flood risk maps. The information was put together using a range of flood maps and data published by local authorities, central government ...

NIWA's Crispin Middleton is part of the team monitoring the caulerpa infestation. Photo: Irene Middleton, NIWA. NIWA is part of a multi-agency biosecurity response to an invasive seaweed discovered at ...

Regional predictions for December 2022 – February 2023. Northland, Auckland, Waikato, Bay of Plenty. The table below shows the probabilities (or percent chances) for each of three categories: above ...

Cyclone Gabrielle formed in the Coral Sea and struck the northeast of Aotearoa New Zealand as an ex-tropical cyclone in February 2023. During the event, rainfall totals reached nearly 450 mm, which is ...

NIWA’s annual end-of-summer snowline survey has revealed continued loss of snow and ice for New Zealand’s famous glaciers. End of summer snowline survey, Tasman Glacier. The 2023 survey was the 46th ...

Stories of tremendous forest fires, huge storm events, and suffocating heatwaves have dominated headlines over the past few years. We instinctively feel that our weather is getting wilder. Are we ...

Rainfall Rainfall was below normal (50-79% of normal) or well below normal (<50% of normal) for much of the country. Rainfall was above normal (120-149% of normal) or well above normal (>149% of ...

January was Auckland's wettest month since records began, according to meteorologists. The Central Auckland Rainfall series recorded a total of 539 mm of rain at Albert Park, smashing the previous ...

She has produced a StoryMap detailing how the system works – with maps, animations and graphics – outlining how her team validated the AI flood model against the real-life 2021 Westport flooding. “Our ...