Active front followed by a cool change

MetService News Release
11 April 2019

A front that dropped around 200mm of rain on the ranges of South Westland during Wednesday and caused the temporary closure of State Highway 6 between Makarora and Haast, is now making its way across central and northern New Zealand. Although the rain isn’t expected to be as prolonged as it was on the West Coast, the front remains active and brief heavy rain is forecast for several places. A Severe Weather Watch is in force for northeast Marlborough, Wellington and southern Wairarapa.

MetService Meteorologist Peter Little comments, “Along with the front, thunderstorms are also possible, mainly in the north and west of the North Island. As well as heavy rain, any thunderstorms that occur could bring hail, strong winds and even a small tornado.”

A showery southwesterly flow follows the passage of the front, with cooler temperatures forecast as we head into the weekend. A narrow ridge of high pressure brings clearing weather to most places on Saturday, with a cold start expected over much of the South Island.

“Most folk in the South Island can expect a chilly start to their Saturday,” adds Little, “There’s a good chance of a frost in inland places such as Central Otago.” “Parts of the North Island can expect a crisp start on Sunday,” Little continues, “Taumaranui and Taupo are forecast to dip down to 2°C under clear skies on Sunday morning.”

A weak front moves up the country during Sunday and Monday, with showers returning to southern and eastern areas and temperatures remaining cool.

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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