Thunderstorms, snow and cold rain

October 7, 2013

The reasonably settled conditions of the last few days are about to come to an end as a large low develops in the Tasman Sea, along with a surge of much colder air behind a front moving up the South Island.

MetService Media and Communications Meteorologist Daniel Corbett commented,”The next several days will be quite a shock to the system across some parts of the country. People will certainly be grabbing the extra warm layers.”

While not unusual for October, temperatures in the east of the South Island over the next few days are likely to be significantly colder than they have been in recent weeks. Rain is expected to turn to snow over higher ground from Mid Canterbury to Marlborough overnight Monday. During Tuesday, heavy snow may fall to about 500 metres in these areas, with cold persistent rain to lower levels.

“This is likely to be a significant event for parts of the South Island high country,” Corbett went on to say. “Farmers in these areas should be aware that vulnerable stock may be at risk. In addition, higher roads may be affected and conditions are likely to be hazardous for trampers.”

In addition, the period from Tuesday afternoon through Wednesday is expected to be showery over much of the North Island. “Thunderstorms are likely over northern New Zealand on Tuesday afternoon and evening,” said Corbett. “Even at this early stage, there is some risk of severe thunderstorms in the north. MetService’s Severe Weather team will be keeping a close eye on how this situation develops.”

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, @metservice on Twitter and at blog.metservice.com.

For further information please contact:
Daniel Corbett Media and Communications 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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