Another Winter Storm On The Way

July 19, 2017

A broad low with a series of fronts is set to sweep over New Zealand during the next few days bringing rain, snow and strong winds.  During Thursday a strong, moist northerly flow brings rain to much of the North Island, with the potential for heavy falls for the Bay of Plenty and Gisborne areas. The low then crosses the South Island during Friday, and the risk of heavy rain extends over southern and eastern areas , falling as snow over higher inland parts.  The low then departs the country to the east during Saturday afternoon, and we see an improving trend for the second half of the weekend.

“We have a Severe Weather Watch in place for Northland, Auckland, Coromandel Peninsula and Bay of Plenty for very strong northeast winds from Thursday afternoon, and some exposed parts may see gusts of 100km/h towards evening”, MetService meteorologist Robert Kerr said.  “Also, thunderstorms are forecast for the Northland, Auckland, Coromandel and Bay of Plenty regions from Thursday afternoon, and there is a potential for some of them to bring localised downpours and very strong winds”, Kerr went on to say.  Up to date details about the MetService thunderstorm forecasts can be found at http://www.metservice.com/warnings/thunderstorm-outlook.

As the low crosses the country during Friday morning, rain and showers cover much of the country, and heavier snow and rain impacts southern and eastern parts of the South Island.  “We also have a Severe Weather Watch for Canterbury and Otago for Friday and Saturday, for rain potentially reaching warning amounts and significant snow accumulations above 400 meters”, said Kerr.  As the rain sets in during Friday, the Christchurch, Dunedin and inland areas are at risk of warning thresholds being surpassed, which could lead to rapidly rising rivers and localised flooding. This combination of heavy rain and inland snow is likely to cause significant disruption to the transport network and possibly cause power outages.  The Severe Weather Watch currently covering these areas are likely to be upgraded to a Severe Weather Warning for rain and snow over the next 24 hours.

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

 

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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