New Zealand Will Experience Severe Rain and Strong wind  

It is forecasted that from July 10 to 12, influenced by a cutoff low vortex (Figure 1), in New Zealand, the North Island and parts of the South Island will experience moderate to heavy rain, with localized downpours. In high-altitude areas, light to moderate snow or sleet is expected. The western and northern regions may see accumulated precipitation of 50-80 mm, with localized areas exceeding 100 mm (Figure 2). Additionally, most of central and northern New Zealand will be accompanied by winds of 5-6 on the Beaufort scale, with gusts reaching 7-8, and coastal areas may experience gusts of up to 9-10 (Figure 3). Close attention should be paid to the adverse impacts of this severe wind and rain event on power facilities, transportation, and other industries.

Figure 1  500 hPa Geopotential Height (contours, unit: dagpm) and 850 hPa Wind Field (wind barbs, unit: m/s) at 08:00 BJT on July 11, 2025

Figure 2   Forecasted Accumulated Precipitation from July 10-12, 2025 (unit: mm)

Figure 3   Maximum Gust Forecast for July 11, 2025 (unit: m/s)

Author: Xie Jin                                 Reviewer: Cai Xiangning 

English reviewer:Wang Yi                                        Issue approver:Dai Kan