Summer thunderstorms but cool temperatures

December 16, 2015

A cool, southerly flow will bring showers to most of the country over the next few days. These showers are likely to turn thundery in certain places during the afternoon as daytime heating gives them an extra little kick.

Showers are on the cards for many regions, and with an area of low pressure developing to the east of the North Island, even dried-out spots in Gisborne and Hawke’s Bay can expect to get wet.

“Thunderstorm activity is forecast to get going this afternoon due to some extra energy provided by daytime heating,” said meteorologist Emma Blades.  “The best picks for thunderstorms today are the northeast, Canterbury High Country and Marlborough, where hail and heavy showers are expected,”  commented Ms Blades.

In addition, a narrow band of heavy showers is moving up the west of the country today and is forecast to pass over Auckland this afternoon. “This  band brought 5mm of rain in an hour to New Plymouth this morning as it passed over, so we expect something similar as it moves over Auckland, but  fortunately it will be brief,” Ms Blades added.

Thursday will also be an active day, with a high risk of thunderstorms in central parts of the North Island. Hail and heavy showers are likely in Taupo, Taumaranui and Taihape. For details see the MetService Thunderstorm Outlook: http://info.metraweather.com/e/60812/warnings-thunderstorm-outlook/5mzjhn/239106891

Friday is another showery day in the North Island, but will be mostly sunny in the south as high pressure starts to build there.

At MetService we have access to many weather models and at the moment these models are telling slightly different stories weather-wise leading up to Christmas Day. One of these models is shown in our ten-day forecast, but note that the story about the expected weather is likely to go through a  number of refinements; some from wet to dry. With changeable weather in the forecast, it is a good idea to check the latest update before you head out for your last minute Christmas shopping!

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

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