Warm windy weather makes way for a cold snap in the south

January 22, 2019

A broad westerly flow makes it windy for exposed parts of the South Island and lower North Island today, while it remains mostly sunny and warm in the north and east.

MetService meteorologist Mark Bowe says, “Eastern areas of the country can enjoy a fine summers day today with the dry northwest winds over the South Island with forecast temperatures expected to reach 29°C for Christchurch, 28°C in Blenheim and Timaru and 26°C in Dunedin.”

There are Severe Weather Watches and Warnings in place, some starting later today (Tuesday), in relation to a heavy rain band and associated strong winds moving onto the lower South Island on Wednesday.

This active front will be preceded by strong northwest winds with possible severe gales forecast for several locations from Southland to Wairarapa, and western areas of the South Island may also see some thunderstorms with the passing of the front.

“While western areas of the South Island will bear the brunt of the heavy rain, most eastern areas of the South Island will see some wet weather on Wednesday,” Bowe confirms.

Those in the lower South Island will see temperatures take a sudden dip as cold air from the far south will brush past the lower parts of the country Wednesday evening, with a dusting of snow in Fiordland above 1400m

It is a different story over the North Island on Wednesday as a warm moist westerly flow blankets the Island, but conditions should be fine and dry in the east for the cricket showdown between New Zealand and India in Napier.

Residents in central parts of the country will see a cold and wet southerly change in the early morning hours of Wednesday, but by the time it reaches Northland Thursday night, the rain band will weaken to a few showers. On Thursday a ridge blankets the country giving a cool southwest flow with just couple of showers to finish off the week.

Warnings are about taking action:

  • When severe weather is imminent or is occurring
  • Issued only when required
  • Recommendation: ACT

Watches are about being alert:

  • When severe weather is possible but not sufficiently imminent or certain for a Warning to be issued
  • Issued only when required
  • Recommendation: BE READY

Outlooks are about looking ahead:

  • To provide advance information on possible future Watches and/or Warnings
  • Issued routinely once or twice a day
  • Recommendation: PLAN


To get the most up to date information on severe weather around the country, or any other forecasts, see metservice.com or download the MetService mobile app

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