Polar Vortex 2025 Forecast Nz. Based on the january 15, 2025 forecast, the stratospheric polar vortex winds will decrease to zero, just reaching the threshold of a major sudden stratospheric warming, in the next day or two. Metservice is warning of snow and bitterly cold temperatures which could damage crops and stress livestock.
Heavy rain is forecast across northland and auckland from early monday morning, with the possibility of severe northeast gales in some exposed northern locations. This means a true wind reversal in the.