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Thunderstorms, tornado risk for northern NZ tonight

Thunderstorms and squalls, with the potential to cause damage in isolated pockets, are tonight moving in from the Tasman Sea towards Northland and surrounding regions says

In the past hour the free and live Lightning Tracker has shown a jump in activity north of Auckland.

The showers – which will be heavy and squally at times – have the potential to cause isolated pockets of damage tonight.

While showers have become less frequent this afternoon – and winds have eased a fair bit too – conditions are predicted to change this evening.

Showers will become heavy and frequent from Taranaki northwards – with the bulk of the heavy showers affecting Northland.

However these heavy showers should also clip Auckland and surrounding regions.

Showers may bring short bursts of torrential rain and cause localised surface and flash flooding. Motorists are advised to drive with care overnight tonight.

Some showers may include thunderstorms and squalls are likely – which could suddenly, and without warning, bring damaging gales to localised areas.

Not all parts of each region will be affected by severe weather – but the potential is there.

There is also a risk of small tornadoes, either EF0 or EF1 rating (the lowest on the scale). These are possible across Northland and potentially Auckland, Waikato and BOP and, should one occur, be similar to other small tornadoes reported across NZ this year.

Should a tornado hit your home, immediately get into a small windowless room, or hallway. Do not close windows and do not go outside. They pass quickly and conditions should ease within minutes.

Overall winds will be westerly and may be gale force at times, but not likely to be damaging. During Tuesday winds will turn south west and potentially strengthen further – this may be close enough for a wind warning to be issued by the government forecaster.



JohnGaul on 12/09/2011 8:02am

There were a few thunderstorms to the NW of Christchurch this afternoon but nothing much to cause alarm.

Hail from one of these storms were reported in Rangiora.

Obviously, these thunderstoms weren’t ‘Severe’ as MetService had a NO THUNDERSTORM icon over the South Island for today on their thunderstorm forecast for today.Innocent



Geoff on 12/09/2011 10:13am

What is the NZ Thunderstorm society? Can I find out about thunderstorms in Canterbury from here? Do you have a website? I’m always interested when the name comes up.

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