Cold southerlies die away on Friday, with a vast improvement for the weekend

July 27, 2017

An active cold front surges through Wellington this evening, sweeping gale force southerlies over southern and eastern North Island areas in its wake. Cold Antarctic air behind the front lowers temperatures considerably around the country, with snow gradually falling to 400 metres in Southland and Otago this afternoon and evening, to 300 metres in Canterbury and to 500 metres in Marlborough. Severe Weather Watches and Warnings associated with this system are in force for many parts of the country, and people travelling should check the NZ Transport Agency website for any road closures before heading out.

Conditions improve over the South Island during Friday, as a ridge of high pressure moves in from the Tasman Sea. The cold blast moves north over eastern and southern parts of the North Island through Friday, with heavy rain, and snow down to 700 metres during the day, further lowering to 500 metres in the evening and the rain easing to a few showers. MetService has issued Road Snowfall Warnings for several South and North Island roads.

Clearing skies and winds dying out over much of the South Island on Friday are a good recipe for frosts to form Friday and Saturday nights. MetService Meteorologist Andy Best said “Mosgiel people will wake up to -3C Saturday morning, and to -4C Sunday morning, while people in Middlemarch see a severe frost of around -10C both Saturday and Sunday mornings. Other places such as Lincoln in Christchurch sees -2C Sunday morning, Queenstown -6C”.

Best went on to say “New Zealand International Film Festival ticket holders can expect perfect movie watching weather in Wellington, with cold showery southerlies for the opening day on Friday, let’s hope the cinemas are all warm and toasty. Meanwhile, for the Crusaders versus Chiefs match in Christchurch, the southerlies are expected to die away Saturday afternoon, but it will be a cold, dry evening so spectators should wrap up well.”

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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