NZ Historic Weather Events Catalog

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SevereDecember 2012 Auckland Tornado ( 2012-12-06 )

Around midday on Thursday 6 December an active trough line passed slowly through Auckland. A thunderstorm in this line produced a tornado that touched down near Hobsonville and Whenuapai. After passing northwest Auckland, the line of showers continued on a southeast path that took it across northern Waikato, Bay of Plenty and across Mahia Peninsula

Auckland

Multi HazardMulti Hazard at Auckland
Comments:

Insurance ClaimInsurance claims for the tornado total $6.5 million.

CommentThe tornado struck about 12:15pm, ripping roofs from houses, toppling trees and sending debris flying. Houses were crushed by trees; some completely flattened. Power lines had been ripped out, windows smashed, and entire roofs had blown away.

DamageThe cost of the clean-up is estimated at $13 million.

DamageThere are 22 houses up for demolition; 18 in Whenuapai and four in Hobsonville.

Affected LifelinePower was disrupted for about 1300 customers. Numerous parts of Auckland were affected, including Henderson, Greenhithe, Hobsonville, Riverhead, Meadowbank and St Johns.

Affected LifelineThere was widespread surface flooding on roads and motorways throughout Auckland and motorists were urged to take care or stay off the roads if possible. Several roads were closed, including State Highway 18 due to debris on the roads.

TornadoTornado at Hobsonville
Map Location: -36.796077 174.648834
Comments:

CasualtiesThree construction workers working at the Hobsonville Point school construction site were killed when they were crushed by falling concrete panels.

InjuriesSeven people were taken to hospital, suffering moderate and minor injuries.

DamageThe storm damaged 150 houses and forced 250 residents to evacuate to the nearby Whenuapai airforce base.

TornadoTornado at Whenuapai
Map Location: -36.788052 174.613904
Comments:

DamageThe damage to the area around Waimarie and Totara Roads was extensive, with eight power poles and three transformers needing to be replaced.

Peak Wind SpeedWind gusts of 110km/h were recorded at Whenuapai.

High Wind GustsHigh Wind / Gust at Auckland International Airport
Map Location: -37.008447 174.782053
Comments:

CommentAirport staff were ordered off its tarmac to take shelter. At least 19 flight arrivals and 14 departures were cancelled.

Bay of Plenty

Multi HazardMulti Hazard at Rotorua
Map Location: -38.140434 176.262282
Comments:

Comment Forty schoolchildren were left stranded at a remote horse riding school, about 20 km northwest of Rotorua, when a 45 metre high gum tree was blown over and blocked the road. The tree brought down power lines, cutting power to 200 homes. A trampoline was blown through the wall of a house at the riding school. The strong winds sent calves flying into the air, and horses were hurt when they were struck by lightning.

CommentThere was also flash flooding resulting from torrential rain associated with the storm.

LightningLightning at Reporoa
Map Location: -38.43602 176.341011
Comments:

CommentEight dairy cows were killed by lightning, when a storm struck about 3 pm. The storm brought more than 54mm of rainfall to the region and dozens of lightning strikes.

Waikato

Multi HazardMulti Hazard at Waikato
Comments:

CommentWaikato experienced thunder, heavy rain and surface flooding during a storm that swept through in the afternoon.

References

Headline: Vicious twister turns calm to shrieking mayhem.
New Zealand Herald, 7 December 2012.
Headline: Tornado clean-up begins as Key heads to destruction zone.
New Zealand Herald, 7 December 2012.
Headline: Twisters pummel Auckland, Rotorua.
www.stuff.co.nz, 6 December 2012.
Headline: Rotorua tornado: Calves tossed into the air.
www.stuff.co.nz, 7 December 2012.
Headline: Lightning strike claims cows
www.bayofplentytimes.co.nz, 11 December 2012.
Headline: Tornado repair bill $13m and rising
www.stuff.co.nz, 10 December 2012.
Headline: Auckland tornado impossible to predict - expert.
www.stuff.co.nz, 11 December 2012.
Insurance Council of New Zealand (www.icnz.org.nz/current/weather)

SevereDecember 2012 Auckland Tornado ( 2012-12-06 )

Around midday on Thursday 6 December an active trough line passed slowly through Auckland. A thunderstorm in this line produced a tornado that touched down near Hobsonville and Whenuapai. After passing northwest Auckland, the line of showers continued on a southeast path that took it across northern Waikato, Bay of Plenty and across Mahia Peninsula

Auckland

Multi HazardMulti Hazard at Auckland
Comments:

Insurance ClaimInsurance claims for the tornado total $6.5 million.

CommentThe tornado struck about 12:15pm, ripping roofs from houses, toppling trees and sending debris flying. Houses were crushed by trees; some completely flattened. Power lines had been ripped out, windows smashed, and entire roofs had blown away.

DamageThe cost of the clean-up is estimated at $13 million.

DamageThere are 22 houses up for demolition; 18 in Whenuapai and four in Hobsonville.

Affected LifelinePower was disrupted for about 1300 customers. Numerous parts of Auckland were affected, including Henderson, Greenhithe, Hobsonville, Riverhead, Meadowbank and St Johns.

Affected LifelineThere was widespread surface flooding on roads and motorways throughout Auckland and motorists were urged to take care or stay off the roads if possible. Several roads were closed, including State Highway 18 due to debris on the roads.

TornadoTornado at Hobsonville
Map Location: -36.796077 174.648834
Comments:

CasualtiesThree construction workers working at the Hobsonville Point school construction site were killed when they were crushed by falling concrete panels.

InjuriesSeven people were taken to hospital, suffering moderate and minor injuries.

DamageThe storm damaged 150 houses and forced 250 residents to evacuate to the nearby Whenuapai airforce base.

TornadoTornado at Whenuapai
Map Location: -36.788052 174.613904
Comments:

DamageThe damage to the area around Waimarie and Totara Roads was extensive, with eight power poles and three transformers needing to be replaced.

Peak Wind SpeedWind gusts of 110km/h were recorded at Whenuapai.

High Wind GustsHigh Wind / Gust at Auckland International Airport
Map Location: -37.008447 174.782053
Comments:

CommentAirport staff were ordered off its tarmac to take shelter. At least 19 flight arrivals and 14 departures were cancelled.

Bay of Plenty

Multi HazardMulti Hazard at Rotorua
Map Location: -38.140434 176.262282
Comments:

Comment Forty schoolchildren were left stranded at a remote horse riding school, about 20 km northwest of Rotorua, when a 45 metre high gum tree was blown over and blocked the road. The tree brought down power lines, cutting power to 200 homes. A trampoline was blown through the wall of a house at the riding school. The strong winds sent calves flying into the air, and horses were hurt when they were struck by lightning.

CommentThere was also flash flooding resulting from torrential rain associated with the storm.

LightningLightning at Reporoa
Map Location: -38.43602 176.341011
Comments:

CommentEight dairy cows were killed by lightning, when a storm struck about 3 pm. The storm brought more than 54mm of rainfall to the region and dozens of lightning strikes.

Waikato

Multi HazardMulti Hazard at Waikato
Comments:

CommentWaikato experienced thunder, heavy rain and surface flooding during a storm that swept through in the afternoon.

References

Headline: Vicious twister turns calm to shrieking mayhem.
New Zealand Herald, 7 December 2012.
Headline: Tornado clean-up begins as Key heads to destruction zone.
New Zealand Herald, 7 December 2012.
Headline: Twisters pummel Auckland, Rotorua.
www.stuff.co.nz, 6 December 2012.
Headline: Rotorua tornado: Calves tossed into the air.
www.stuff.co.nz, 7 December 2012.
Headline: Lightning strike claims cows
www.bayofplentytimes.co.nz, 11 December 2012.
Headline: Tornado repair bill $13m and rising
www.stuff.co.nz, 10 December 2012.
Headline: Auckland tornado impossible to predict - expert.
www.stuff.co.nz, 11 December 2012.
Insurance Council of New Zealand (www.icnz.org.nz/current/weather)