Posts Tagged ‘change’

An unusually late cold spell

November 10, 2014

After the fine and sunny weekend, there is a busy start to the weather week, with a number of volatile fronts moving over New Zealand. These fronts will herald an unusually late cold spell as we move through the week. “The temperatures this week will be well down for the time of year, with gales, hail and thunderstorms thrown in to the mix,” said MetService Meteorologist Rob Kerr.

The South Island bears the brunt of the weather on Monday, as a wedge of warm, moist air moves over from the Tasman Sea. As a result, watches and warnings are in place for heavy rain over the Westland ranges, and strong winds about inland Canterbury, north of the Rakaia River. The watch expands the rain risk area to Fiordland and the risk of gales for the remainder of Canterbury and also for the Wairarapa. Things are far more settled in the north today, with plenty of sun for the main centres and temperatures in the 20s.

“However, several cold southwest changes march northwards over the next few days, reaching the North Island Tuesday and early Wednesday,” Kerr said. “This highly unstable air brings a risk of thunderstorms for many areas.” A showery southwesterly flow covers all of New Zealand from Wednesday, with a few showers off and on for the Canterbury Show, although most will be confined to Banks Peninsula. The weather is expected to settle down for Friday and remain mostly fine and dry for early Saturday. However, yet another swift moving front is expected during Saturday and Sunday.

Keep up to date with the latest forecasts and any watches/warnings at 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 on Twitter, and at blog.metservice.com.

For further information please contact:
Rob Kerr Meteorologist (04)4700 754


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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
* 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
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