NZ Historic Weather Events Catalogue

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February 2018 Ex Tropical Cyclone Gita ( 2018-02-20 )

Ex-tropical cyclone Gita brought very heavy rain and severe gales, and caused severe damage to many areas of New Zealand. The worst affected areas were northwest Nelson/Golden Bay, the Kaikoura Coast, and Taranaki.

New Zealand

Multi HazardMulti Hazard at New Zealand
Duration:   3  days - From the 20th to 22nd of February.
Comments:

Insurance ClaimInsurance claims totalled $35.6 million.

Declared EmergencyStates of Emergency were declared in the Nelson Tasman region, Taranaki region, Selwyn district, Grey district, Buller district, Westland district, and Christchurch city.

CommentMetService SEVERE WEATHER WARNING 9:43 pm Monday 19-Feb-2018. Cyclone Gita to bring damaging winds and heavy rain to central New Zealand on Tuesday and early Wednesday. Cyclone Gita, currently located over the Tasman Sea, is forecast to track southeastwards and cross central New Zealand late Tuesday and early Wednesday. The passage of Gita is expected to bring a period of high-impact severe weather to central New Zealand. Heavy rain will cause slips, rapidly rising streams and rivers, and flooding. Severe gales with damaging gusts are expected, so people are advised to secure property and items that may be blown away by strong winds.There is also the potential for coastal inundation with high tide overnight Tuesday and before dawn on Wednesday, due to the combination of tides, low air-pressure, strong onshore winds and large waves in excess of 6 metres in some places. For the North Island, coastal areas from Raglan southwards to southern Wairarapa are most at risk. For the South Island, the risk of coastal inundation is greatest for areas from Buller and North Canterbury northwards.

CommentMetService SEVERE WEATHER WARNING 10:08 pm Tuesday 20-Feb-2018. Severe gales and heavy rain across central New Zealand should ease Wednesday as Cyclone Gita departs. Cyclone Gita is forecast to track southeastwards across the upper South Island tonight (Tuesday), then to move away to the southeast on Wednesday. The high-impact severe weather across central New Zealand should then ease as Gita moves away on Wednesday. Further heavy rain is expected about the Kaikoura Coast, Canterbury, and eastern Otago, then should ease during Wednesday. Severe gales with damaging gusts in exposed parts of central New Zealand should also ease during Wednesday. People are advised to secure property and items that may be blown away by strong winds. There is also the potential for coastal inundation with high tide overnight Tuesday and before dawn on Wednesday, due to the combination of tides, low air-pressure, strong onshore winds and large waves in excess of 6 metres in some places. For the North Island, coastal areas in the west from Raglan southwards Wellington and across to southern Wairarapa are most at risk. For the South Island, the risk of coastal inundation is greatest for areas from Buller and North Canterbury northwards.

CommentMetService SEVERE WEATHER WARNING 9:33 am Wednesday 21-Feb-2018. Heavy rain about Dunedin and North Otago should ease late afternoon. Brief heavy rain possible overnight about Marlborough, Wellington, Kapiti, Horowhenua and western Wairarapa. Cyclone Gita is about 250km east of Canterbury and should continue to move away from the country. Heavy rain associated with Gita is expected to continue in Dunedin and North Otago until late afternoon. A southerly change is expected to move through Cook Strait tonight and may be accompanied by thunderstorms bringing a period of very heavy rain to northern Marlborough, Wellington, Kapiti, Horowhenua and western Wairarapa. Although rainfall accumulations expected would not normally be enough to justify a warning, the recent rain associated with Gita has made these areas more susceptible to damage. The heavy rain about the Kaikoura Coast, Canterbury and Westland ranges has eased and the warnings for these areas have been lifted. All wind warnings associated with Gita are now lifted.

Tasman-Nelson

Multi HazardMulti Hazard at Tasman-Nelson
Comments:

CommentThere was localised flooding in Motueka, Takaka and Marahau, and significant flooding in the Riwaka Plains.

EvacueesThere were hundreds of evacuated residents across the Tasman and Nelson region. Welfare centres operated in Motueka, Takaka, Marahau, Collingwood, and in Nelson at the Salvation Army Hall.

Affected LifelineAreas between Kina and Takaka, including Kaiteriteri, had powercuts.

LandslideLandslide at Takaka
Map Location: -41.03462 172.85033
Comments:

Affected LifelineState Highway 60 was closed due to numerous slips on the Takaka Hill Road. About 5000 people in Golden Bay and Collingwood were isolated due to the road closure. Essential traffic were able to use the Takaka Hill Road during limited hours from February 25. It was fully opened to traffic on 7 April.

Affected LifelineFood supplies ran low in Takaka, so new supplies were brought in by barge. On 20 February the Takaka Fresh Choice completely ran out of bread, milk, and other essentials.

Affected LifelineCivil Defence rationed fuel, with a $30 daily restriction per vehicle per day, exempting emergency services and volunteers helping with the recovery.

Multi HazardMulti Hazard at Kaiteriteri
Map Location: -41.039225 173.018605
Comments:

Affected LifelineThe Kaiteriteri pumping station lost its electrical supply, so local people were told to conserve water.

Taranaki

High Wind GustsHigh Wind / Gust at Taranaki
Comments:

Affected LifelineResidents in New Plymouth, Bell Block, Waitara, Tikorangi, Onaero and Urenui were asked to conserve water

Affected LifelineAbout 26,000 people in the region lost power overnight on 20th February. The power outage affected cellphone and landline coverage in South Taranaki.

CommentMany schools throughout Taranaki were closed.

High Wind GustsHigh Wind / Gust at New Plymouth
Map Location: -39.051214 174.06972
Comments:

Affected LifelineStrong winds brought down a tree, which fell onto and ruptured a pipeline. This disrupted water supplies to New Plymouth.

Canterbury

Multi HazardMulti Hazard at Kaikoura
Map Location: -42.402255 173.685685
Comments:

Affected Lifeline The NZ Transport Agency closed State Highway 1 north and south of Kaikōura on 20th February due to heavy rain and to prevent motorists being stranded on the highway in the event of large waves later in the day. Ex-Cyclone Gita brought down 300,000 cubic metres of debris over the road at 60 sites. It remained closed for about a fortnight.

Affected Lifeline Route 70, known as the inland road, between Kaikōura and Waiau, was closed shortly before 9pm on 20th February as heavy rainfall caused flooding across the district.

Multi HazardMulti Hazard at Christchurch
Map Location: -43.531120 172.636147
Comments:

Affected Lifeline Some flights in and out of Christchurch Airport were cancelled.

Affected Lifeline Some roads were closed because of flooding, including Clarendon Tce, from Opawa Rd to Marshall Rd.

Comment Some residents living alongside Christchurch's Heathcote River evacuated their homes as the waterway threatened to burst its banks.

FloodingFlooding at Selwyn
Map Location: -43.648850 172.231973
Comments:

Comment The Selwyn District Council closed the Coes Ford, Chamberlains Ford and Whitecliffs campgrounds about 6pm on February 20th, after Environment Canterbury advised it expected the Selwyn River to rise rapidly, and it could burst its banks.

West Coast

Multi HazardMulti Hazard at West Coast
Comments:

CommentAlmost 200 tourists spent the night in their vehicles or in welfare centres.

Affected LifelineState Highway 73 near Kumara Junction was closed.

Affected LifelineWestport Harbour was closed.

DamageThe roofs of a number of houses in Whataroa were ripped off, and trees were damaged by the strong winds.

Wellington

Multi HazardMulti Hazard at Paraparaumu
Map Location: -40.912244 174.986353
Comments:

EvacueesSix homes in the Paraparaumu region were evacuated as the combination of heavy rain and high tides caused flooding in low lying areas on 22nd February. There was also widespread flooding in the Paraparaumu Beach/Raumati North area.

Affected Lifeline State Highway 1 was closed north of Wellington between Paekakariki and Pukerua Bay on 21st February at about 12:30am, due to damage to the road caused by the high tide washing across both lanes. One lane was opened about 7am that morning.

High Wind GustsHigh Wind / Gust at Wellington Airport
Map Location: -41.329538 174.805351
Comments:

Affected Lifeline Wellington Airport was closed on 20th February from about 2:30pm through to midnight, disrupting travel plans for many passengers.

References

Meteorological Society of New Zealand (Inc.), Newsletter 152, Autumn 2018
Insurance Council of New Zealand (https://www.icnz.org.nz/natural-disasters/cost-of-natural-disasters/)
Headline: State of emergency declared in Nelson Tasman District
www.stuff.co.nz, 20 February 2018.
Headline: Several Christchurch residents evacuate as Heathcote River threatens to overflow
www.stuff.co.nz, 20 February 2018.
Cyclone Gita: Wild weather grounds flights, knocks down power pole in Wellington.
www.stuff.co.nz, 20 February 2018.
Headline: Former cyclone Gita crosses New Zealand, leaving destruction in its wake.
www.stuff.co.nz, 21 February 2018.
Headline: Cyclone Gita aftermath: What you need to know.
www.radionz.co.nz, 21 February 2018.
Headline: Houses evacuated at Kapiti Coast as high tide and heavy rain cause flooding.
www.stuff.co.nz, 22 February 2018.
Headline: Gita: Clean-up may take ‘longer than a year’.
www.radionz.co.nz, 22 February 2018.
Headline: Takaka Hill road partially reopens, to the relief of those trapped in Golden Bay after Gita.
www.stuff.co.nz, 25 February 2018.
Headline: State Highway 1 through Kaikoura likely to remain closed until the end of next week.
www.stuff.co.nz, 26 February 2018.
Headline: Takaka Hill road to fully re-open from next weekend.
www.stuff.co.nz, 4 April 2018.

February 2018 Ex Tropical Cyclone Gita ( 2018-02-20 )

Ex-tropical cyclone Gita brought very heavy rain and severe gales, and caused severe damage to many areas of New Zealand. The worst affected areas were northwest Nelson/Golden Bay, the Kaikoura Coast, and Taranaki.

New Zealand

Multi HazardMulti Hazard at New Zealand
Duration:   3  days - From the 20th to 22nd of February.
Comments:

Insurance ClaimInsurance claims totalled $35.6 million.

Declared EmergencyStates of Emergency were declared in the Nelson Tasman region, Taranaki region, Selwyn district, Grey district, Buller district, Westland district, and Christchurch city.

CommentMetService SEVERE WEATHER WARNING 9:43 pm Monday 19-Feb-2018. Cyclone Gita to bring damaging winds and heavy rain to central New Zealand on Tuesday and early Wednesday. Cyclone Gita, currently located over the Tasman Sea, is forecast to track southeastwards and cross central New Zealand late Tuesday and early Wednesday. The passage of Gita is expected to bring a period of high-impact severe weather to central New Zealand. Heavy rain will cause slips, rapidly rising streams and rivers, and flooding. Severe gales with damaging gusts are expected, so people are advised to secure property and items that may be blown away by strong winds.There is also the potential for coastal inundation with high tide overnight Tuesday and before dawn on Wednesday, due to the combination of tides, low air-pressure, strong onshore winds and large waves in excess of 6 metres in some places. For the North Island, coastal areas from Raglan southwards to southern Wairarapa are most at risk. For the South Island, the risk of coastal inundation is greatest for areas from Buller and North Canterbury northwards.

CommentMetService SEVERE WEATHER WARNING 10:08 pm Tuesday 20-Feb-2018. Severe gales and heavy rain across central New Zealand should ease Wednesday as Cyclone Gita departs. Cyclone Gita is forecast to track southeastwards across the upper South Island tonight (Tuesday), then to move away to the southeast on Wednesday. The high-impact severe weather across central New Zealand should then ease as Gita moves away on Wednesday. Further heavy rain is expected about the Kaikoura Coast, Canterbury, and eastern Otago, then should ease during Wednesday. Severe gales with damaging gusts in exposed parts of central New Zealand should also ease during Wednesday. People are advised to secure property and items that may be blown away by strong winds. There is also the potential for coastal inundation with high tide overnight Tuesday and before dawn on Wednesday, due to the combination of tides, low air-pressure, strong onshore winds and large waves in excess of 6 metres in some places. For the North Island, coastal areas in the west from Raglan southwards Wellington and across to southern Wairarapa are most at risk. For the South Island, the risk of coastal inundation is greatest for areas from Buller and North Canterbury northwards.

CommentMetService SEVERE WEATHER WARNING 9:33 am Wednesday 21-Feb-2018. Heavy rain about Dunedin and North Otago should ease late afternoon. Brief heavy rain possible overnight about Marlborough, Wellington, Kapiti, Horowhenua and western Wairarapa. Cyclone Gita is about 250km east of Canterbury and should continue to move away from the country. Heavy rain associated with Gita is expected to continue in Dunedin and North Otago until late afternoon. A southerly change is expected to move through Cook Strait tonight and may be accompanied by thunderstorms bringing a period of very heavy rain to northern Marlborough, Wellington, Kapiti, Horowhenua and western Wairarapa. Although rainfall accumulations expected would not normally be enough to justify a warning, the recent rain associated with Gita has made these areas more susceptible to damage. The heavy rain about the Kaikoura Coast, Canterbury and Westland ranges has eased and the warnings for these areas have been lifted. All wind warnings associated with Gita are now lifted.

Tasman-Nelson

Multi HazardMulti Hazard at Tasman-Nelson
Comments:

CommentThere was localised flooding in Motueka, Takaka and Marahau, and significant flooding in the Riwaka Plains.

EvacueesThere were hundreds of evacuated residents across the Tasman and Nelson region. Welfare centres operated in Motueka, Takaka, Marahau, Collingwood, and in Nelson at the Salvation Army Hall.

Affected LifelineAreas between Kina and Takaka, including Kaiteriteri, had powercuts.

LandslideLandslide at Takaka
Map Location: -41.03462 172.85033
Comments:

Affected LifelineState Highway 60 was closed due to numerous slips on the Takaka Hill Road. About 5000 people in Golden Bay and Collingwood were isolated due to the road closure. Essential traffic were able to use the Takaka Hill Road during limited hours from February 25. It was fully opened to traffic on 7 April.

Affected LifelineFood supplies ran low in Takaka, so new supplies were brought in by barge. On 20 February the Takaka Fresh Choice completely ran out of bread, milk, and other essentials.

Affected LifelineCivil Defence rationed fuel, with a $30 daily restriction per vehicle per day, exempting emergency services and volunteers helping with the recovery.

Multi HazardMulti Hazard at Kaiteriteri
Map Location: -41.039225 173.018605
Comments:

Affected LifelineThe Kaiteriteri pumping station lost its electrical supply, so local people were told to conserve water.

Taranaki

High Wind GustsHigh Wind / Gust at Taranaki
Comments:

Affected LifelineResidents in New Plymouth, Bell Block, Waitara, Tikorangi, Onaero and Urenui were asked to conserve water

Affected LifelineAbout 26,000 people in the region lost power overnight on 20th February. The power outage affected cellphone and landline coverage in South Taranaki.

CommentMany schools throughout Taranaki were closed.

High Wind GustsHigh Wind / Gust at New Plymouth
Map Location: -39.051214 174.06972
Comments:

Affected LifelineStrong winds brought down a tree, which fell onto and ruptured a pipeline. This disrupted water supplies to New Plymouth.

Canterbury

Multi HazardMulti Hazard at Kaikoura
Map Location: -42.402255 173.685685
Comments:

Affected Lifeline The NZ Transport Agency closed State Highway 1 north and south of Kaikōura on 20th February due to heavy rain and to prevent motorists being stranded on the highway in the event of large waves later in the day. Ex-Cyclone Gita brought down 300,000 cubic metres of debris over the road at 60 sites. It remained closed for about a fortnight.

Affected Lifeline Route 70, known as the inland road, between Kaikōura and Waiau, was closed shortly before 9pm on 20th February as heavy rainfall caused flooding across the district.

Multi HazardMulti Hazard at Christchurch
Map Location: -43.531120 172.636147
Comments:

Affected Lifeline Some flights in and out of Christchurch Airport were cancelled.

Affected Lifeline Some roads were closed because of flooding, including Clarendon Tce, from Opawa Rd to Marshall Rd.

Comment Some residents living alongside Christchurch's Heathcote River evacuated their homes as the waterway threatened to burst its banks.

FloodingFlooding at Selwyn
Map Location: -43.648850 172.231973
Comments:

Comment The Selwyn District Council closed the Coes Ford, Chamberlains Ford and Whitecliffs campgrounds about 6pm on February 20th, after Environment Canterbury advised it expected the Selwyn River to rise rapidly, and it could burst its banks.

West Coast

Multi HazardMulti Hazard at West Coast
Comments:

CommentAlmost 200 tourists spent the night in their vehicles or in welfare centres.

Affected LifelineState Highway 73 near Kumara Junction was closed.

Affected LifelineWestport Harbour was closed.

DamageThe roofs of a number of houses in Whataroa were ripped off, and trees were damaged by the strong winds.

Wellington

Multi HazardMulti Hazard at Paraparaumu
Map Location: -40.912244 174.986353
Comments:

EvacueesSix homes in the Paraparaumu region were evacuated as the combination of heavy rain and high tides caused flooding in low lying areas on 22nd February. There was also widespread flooding in the Paraparaumu Beach/Raumati North area.

Affected Lifeline State Highway 1 was closed north of Wellington between Paekakariki and Pukerua Bay on 21st February at about 12:30am, due to damage to the road caused by the high tide washing across both lanes. One lane was opened about 7am that morning.

High Wind GustsHigh Wind / Gust at Wellington Airport
Map Location: -41.329538 174.805351
Comments:

Affected Lifeline Wellington Airport was closed on 20th February from about 2:30pm through to midnight, disrupting travel plans for many passengers.

References

Meteorological Society of New Zealand (Inc.), Newsletter 152, Autumn 2018
Insurance Council of New Zealand (https://www.icnz.org.nz/natural-disasters/cost-of-natural-disasters/)
Headline: State of emergency declared in Nelson Tasman District
www.stuff.co.nz, 20 February 2018.
Headline: Several Christchurch residents evacuate as Heathcote River threatens to overflow
www.stuff.co.nz, 20 February 2018.
Cyclone Gita: Wild weather grounds flights, knocks down power pole in Wellington.
www.stuff.co.nz, 20 February 2018.
Headline: Former cyclone Gita crosses New Zealand, leaving destruction in its wake.
www.stuff.co.nz, 21 February 2018.
Headline: Cyclone Gita aftermath: What you need to know.
www.radionz.co.nz, 21 February 2018.
Headline: Houses evacuated at Kapiti Coast as high tide and heavy rain cause flooding.
www.stuff.co.nz, 22 February 2018.
Headline: Gita: Clean-up may take ‘longer than a year’.
www.radionz.co.nz, 22 February 2018.
Headline: Takaka Hill road partially reopens, to the relief of those trapped in Golden Bay after Gita.
www.stuff.co.nz, 25 February 2018.
Headline: State Highway 1 through Kaikoura likely to remain closed until the end of next week.
www.stuff.co.nz, 26 February 2018.
Headline: Takaka Hill road to fully re-open from next weekend.
www.stuff.co.nz, 4 April 2018.