A repeating pattern of northerlies

August 6, 2017

A repeating pattern of northerlies

New Zealand experienced both the high side and the low side of a northerly flow this weekend, and that trend is set to continue through the coming week.

Saturday was a sunny and calm day for nearly all the country. The southerly flow which had gripped New Zealand for much of last week was replaced by a light northerly flow, and as a result average temperatures were up, and the mornings lost a bit of their chilly bite. “The peak wind speed recorded over the entire day at our Wellington based office was 12 km/hr,” said MetService meteorologist Angus Hines, “it really was a winter stunner.”

A front reached the west coast of the South Island on Sunday morning, directing strong northerlies and spreading a band of rain across the country throughout much of Sunday. Western parts of New Zealand are expected to get the most rain, and a Severe Weather Watch is in force until Sunday evening. Most other places ought to get some brief rain, although it was already clearing from eastern areas of the South Island by the middle of Sunday. “The clearing trend is going to continue for many more people as we start the week, although the band of rain will linger around the Auckland and northern Waikato regions for much of Monday.” Added Mr Hines.

The pattern experienced this weekend is set to repeat itself over the first half of next week. Many places should be predominantly fine for Monday, then another northerly rain band is moving onto the South Island later in the day on Tuesday, and affecting everyone by Wednesday morning. “Our expert meteorologists will be looking closely at issuing Severe Weather Warnings and Watches as the next system approaches,” explained Mr. Hines, “as it looks like it may have more intensity to it than the weekend’s rain.”

Official Severe Weather Watches and Warnings are reviewed and re-issued by MetService at least every twelve hours, and more often if necessary. To get the most up to date information on severe weather around the country, or any other forecasts, see metservice.com or on mobile devices at m.metservice.com. You can also follow our updates on MetService TV, at MetService New Zealand on Facebook@metservice  and @MetServiceWARN on Twitter and at blog.metservice.com


MetService issues Warnings, Watches and Outlooks for severe weather over New Zealand.

Warnings are about taking action when severe weather is imminent or is occurring. They are 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. They are issued only when required.
Recommendation: BE READY 

Outlooks are about looking ahead, providing advance information on possible future Watches and/or Warnings. They are issued routinely once or twice a day.
Recommendation: PLAN 

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