MetService News Release
15 May 2017
ANTARCTIC AIR ON THE WAY
The warm air from the remnants of ex-Tropical Cyclone Donna last week will be a distant memory to New Zealanders by
Friday, with strong southwesterlies delivering significantly chillier weather in the wake of a rain-laden low which
moves over the country on Thursday.
Sunday’s settled weather is expected to break down by Wednesday, when the low, approaching from the west sends bands of
rain over the country and northerly winds pick up. It is likely that Severe Weather Watches and Warnings will be issued
closer to the time, with western coasts of the South Island and regions north of the North Island’s central Plateau
expected to receive the largest rainfall amounts. You can check the Severe Weather Outlook and any Watches and Warnings here.
MetService meteorologist April Clark said, “As the low tracks east on Thursday, winds turn icy with the southwest
change, and occasional showers are forecast to fall as snow to low levels over the lower South Island during Friday and
Saturday. Those for whom snow doesn’t arrive will still be affected by the strong winds, which will make cold
temperatures feel even more bitter. Gore’s forecast high for Friday sits at a wintry 8 degrees.”
Large waves accompany this weather system, with heavy northerly swell expected for the West Coast on Wednesday before a
long period southwest swell spreads over New Zealand’s shoreline. Significant swell heights of 7-8 metres are expected
along southern coasts of the South Island on Friday. You can check updated swell data on the marine forecast maps here.
With snow in the forecast down south, and eastern regions in the North Island set to see a double-digit drop in
temperature, it will pay to have those winter coats handy this week!
You can keep up to date with forecasts as the situation evolves, at metservice.com
The satellite image above shows the low expected to pass over the NZ on Thursday developing to the west while Antarctic
air remains contained (for now) to the south.
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