NZ Historic Weather Events Catalogue

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ExtremeMarch 1975 New Zealand Ex-tropical Cyclone Alison ( 1975-03-10 )

35-200+ years

Ex-tropical Cyclone Alison caused high winds, heavy rain, flooding, slips and high seas around many parts of New Zealand. Much damage was done to roads, rail and both public and private property. A girl died in the Waikato after she touched a felled electric wire. A car accident on a flooded road in Canterbury saw one woman killed and a girl injured. Some people were also injured when a car fell into a road subsidence in Christchurch.

New Zealand

Multi HazardMulti Hazard at New Zealand
Duration:   5  days - From the 10th to the 14th of March.
Comments:

CauseThe remains of Tropical Cyclone Alison. Cyclone Alison moved southwards, passing west of the country during the 11th to the 14th. On the 11th and 12th, a strong northeast airstream was flowing onto the South Island. The storm was centred off the western side of the North Island, and drifted down the Taranaki coast and onto Buller and Westland.

CauseAnecdotal reports suggest that, at a time when the wind was destroying property in Greymouth, it was flat calm in Kaikoura, but coming down “in buckets”. Orographic enhancement of very moist, humid tropical air was obviously a major contributor to heavy rain. An anticyclone passing south of the South Island helped maintain a very strong pressure gradient on the south-eastern flank of the low, and also ingested some cold air into the system. The low weakened as the high moved away.

DamageScattered damage occurred over much of New Zealand. Trees were uprooted, house roofs lifted, boats sunk, and farms and towns were flooded, all the way from Northland to Otago.

Northland

High Wind GustsHigh Wind / Gust at Northland
Comments:

Affected LifelineNorthland was lashed by the cyclone on the 11th and telephone and power services in many areas were disrupted.

Affected LifelineAll toll links with Dargaville were cut. Communications with Kaitaia were cut. Some areas further north, including the Cape Reinga lighthouse, were cut off.

High Wind GustsHigh Wind / Gust at Whangarei
Map Location: -35.719519 174.298397
Comments:

Physical CharacteristicWhangarei airport reported one gust of 63 knots (117 km/hr) at 1.40pm on the 11th.

Auckland

Multi HazardMulti Hazard at Auckland
Comments:

CommentThe storm on the 11th was the worst storm in Auckland in 15 years.

Multi HazardMulti Hazard at Auckland City
Map Location: -36.852397 174.762337
Comments:

CommentFierce, gusting winds and torrential rain occurred in Auckland on the 11th. Cyclone Alison was centred about 180 miles north-west of the city on the 11th. The centre of the cyclone was expected to hit the Taranaki Bight on the night of the 12th, then move across the North lsland toward Hawkes Bay and the BOP.

Physical CharacteristicAuckland recorded 28 mm (2.8 cm) of rain between noon and 10pm on the 11th.

FloodingFlooding
Comments:

Affected LifelineScores of cars were stranded all over the city as water ran inches deep in many streets.

High Wind GustsHigh Wind / Gust
Comments:

Physical CharacteristicAuckland was lashed by gusts of up to 55 knots 102 km/hr).

Affected LifelineThe storm brought down power lines in many parts of the city. Falling trees and branches were largely to blame. The areas that suffered the most were Orakei, Remuera and Mangere.

Multi HazardMulti Hazard at Henderson
Map Location: -36.880798 174.619453
Comments:

Crop DamageThe storm came at the worst possible time for Henderson orchardists. Peaches, just ready for picking, were damaged by the driving rain and strong winds.

Heavy RainHeavy Rain at Howick
Map Location: -36.896907 174.926193
Comments:

ImpactA torrential downpour hit part of Auckland on the 14th and caused extensive flooding in Howick and Glenowie, and thousands of dollars in damage.

Physical CharacteristicA back yard rain gauge in Auckland recorded 4 in (10.16 cm) in 45 minutes.

FloodingFlooding
Comments:

Damage CostThe Howick branch of the Manukau Knitting Mills Ltd was severely hit. The factory floor was covered for a time in three feet (0.91 m) of water and large amounts of stock were ruined and machinery damaged. The damage to this factory was estimated at more than $100,000 ($901,000 2010 dollars).

ImpactIn Juliet St, Howick, basements were flooded as drain tops were blown off by water pressure.

DamageBehar Presses N.Z. Ltd. Of Vincent St, Howick, lost all of its stock. Five feet (1.52 m) of water covered the floor and it was found that the pressure had lifted the floor three feet (0.91 m) from the foundations.

High Wind GustsHigh Wind / Gust at Manurewa
Map Location: -37.027498 174.880907
Comments:

ImpactAbout 1100 pupils at the James Cook High School were sent home as gusts of wind tore tiles from the roof.

Maritime / CoastalMaritime / Coastal at Northcote
Map Location: -36.814428 174.741753
Comments:

Damage CostA near-new yacht sank off Northcote Point. It was worth $40,000 ($350,000 2008 dollars).

High Wind GustsHigh Wind / Gust at Waitemata Harbour
Map Location: -36.831068 174.743854
Comments:

Peak Wind SpeedAuckland Harbour recorded winds of up to 65 mph (105 km/hr).

Physical CharacteristicIn the Hauraki Gulf the winds reached 70 knots (130 km/hr) whipping up high seas which ripped boats from their moorings in the Waitemata Harbour.

ImpactThe storm brought work on ships at Fergusson Wharf to a halt for two days until the 12th. Ships were delayed and cargo work was disrupted by the storm.

ImpactThe Auckland Launch and Towboat Company had a busy day on the 12th salvaging about half a dozen yachts and small craft. Most spare Harbour Board craft were busy salvaging pleasure craft which had broken their moorings.

DamageA 35-foot ketch Sea Call was dashed onto the rocks. A 38-foot launch Te Kowhai was smashed against the sea wall in Okahu Bay. The launch was valued at about $15,000 ($135,000 2010 dollars). A 38-foot sloop, moored at Northcote, was torn free and driven aground, where she promptly sank.

High Wind GustsHigh Wind / Gust at Warkworth
Map Location: -36.40461 174.668477
Comments:

Affected LifelineState Highway 1, north of Warkworth, was blocked by a fallen tree on the 11th for half an hour.

Waikato

High Wind GustsHigh Wind / Gust at Waikato
Comments:

DamageTrees were uprooted.

Crop DamageFruit was damaged in orchards.

Affected LifelinePower cuts were widespread.

Affected LifelinePhone lines between Te Awamutu and Kawhia were cut for a short period.

Physical CharacteristicThe Piako County experienced gale force winds up to 70 knots (130 km/hr).

Affected LifelineTrees were blown down and roads blocked in the Piako County.

Multi HazardMulti Hazard
Comments:

Affected LifelineRoads were affected by slips and flooding.

DamageGale force winds and heavy rain left a trail of damage in the Thames-Coromandel District.

Affected LifelinePower faults occurred in the Thames-Coromandel District.

Affected LifelineHeavy rain closed the Kopu-Hikuai road.

ImpactThere was one minor road accident in the Waikato.

FloodingFlooding at Awaroa River
Map Location: -38.17467 174.943199
Comments:

CommentThe Awaroa Rivers flooded to the highest level in memory.

Multi HazardMulti Hazard at Hahei
Map Location: -36.841594 175.798359
Comments:

Affected LifelineThe Hahei area was without power and telephone for some hours.

Multi HazardMulti Hazard at Hamilton
Map Location: -37.780816 175.272836
Comments:

Affected LifelineHamilton Airport was closed from 4:30pm on the 11th until the morning of the 12th.

High Wind GustsHigh Wind / Gust
Comments:

Physical CharacteristicHamilton Airport recorded wind gusts of up to 40 knots (74 km/hr).

FloodingFlooding at Hikuai
Map Location: -37.070762 175.773609
Comments:

Affected LifelineHikuai was without power from midnight on the 11th, and road flooding had prevented access to the town until late morning of the 12th.

Affected LifelineThere was several feet of water over S.H. 25 at Hikuai.

Affected LifelineThe Tapu Creek Road was without power from midnight until 8 a.m. on the 12th because of flooding.

Affected LifelineThe coast road between Waikawau and Wilsons Bay was without power after a pole was washed out near Waikawau Bridge.

Multi HazardMulti Hazard at Hot Water Beach
Map Location: -36.889153 175.824915
Comments:

Affected LifelineThe Hot Water Beach area was without power and telephone for some hours.

FloodingFlooding at Kauri Stream
Map Location: -37.862429 174.888384
Comments:

CommentThe Kauri River flooded to the highest level in memory.

High Wind GustsHigh Wind / Gust at Manawaru
Map Location: -37.63416 175.76652
Comments:

DamagePupils from Manawaru School were sent home. The storm took the roof off a prefabricated classroom, lifted the roof off a junior classroom and cut off water and power supplies.

Multi HazardMulti Hazard at Matamata
Map Location: -37.806306 175.778708
Comments:

DamageHigh winds and heavy rain left a trail of damage throughout the Matamata area.

Affected LifelinePower faults occurred, and waterworks were affected.

High Wind GustsHigh Wind / Gust
Comments:

DamageTrees were uprooted.

High Wind GustsHigh Wind / Gust at Morrinsville
Map Location: -37.653686 175.524375
Comments:

Affected LifelinePower lines were downed in Morrinsville.

Affected LifelineSix trees fell across the highway between Morrinsville and Te Aroha.

Heavy RainHeavy Rain at Oparau
Map Location: -38.051476 174.927192
Comments:

Physical CharacteristicOparau recorded 127 mm (12.7 cm) of rain.

High Wind GustsHigh Wind / Gust at Otorohanga
Map Location: -38.174188 175.209784
Comments:

Property DamageAt Otorohanga, sheds were demolished and trees uprooted.

Affected LifelinePower and telephone lines were down.

High Wind GustsHigh Wind / Gust at Raglan
Map Location: -37.797036 174.865014
Comments:

DamageA boat tore free from moorings at Raglan and was blown onto rocks.

Affected LifelineResidents between Te Uku and Raglan were without power several times on the night of the 11th as high winds battered the area.

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

Affected LifelineRotorua Airport was closed.

High Wind GustsHigh Wind / Gust
Comments:

CommentRotorua experienced gale force winds.

FloodingFlooding
Comments:

CommentSurface flooding occurred.

High Wind GustsHigh Wind / Gust at Rotowaro
Map Location: -37.588372 175.066658
Comments:

CasualtiesA 4-year-old girl died in Rotowaro on the 11th when she touched a live wire brought down into a backyard by high winds.

Affected LifelinePhone and power wires were broken.

DamageTrees were broken.

Heavy RainHeavy Rain at Rukuhia
Map Location: -37.852626 175.309282
Comments:

Physical CharacteristicRukuhia recorded 48 mm (4.8 cm) of rain in 24 hours.

Heavy RainHeavy Rain at Te Aroha
Map Location: -37.536498 175.715457
Comments:

Physical CharacteristicTe Aroha recorded 150 mm (15.0 cm) of rain in 24 hours.

High Wind GustsHigh Wind / Gust
Comments:

Property DamageA school at Te Aroha lost some roofing.

Affected LifelinePower lines were downed in Te Aroha.

FloodingFlooding
Comments:

ImpactThere was minor flooding and a few trees down, but rivers did not go beyond the 'fresh' level.

FloodingFlooding at Te Awamutu
Map Location: -38.009384 175.334988
Comments:

CommentFlooding occurred at Te Awamutu.

Stock DamageSheep were lost.

DamageTrees were blown down.

Affected LifelineThe winds blew power lines down.

Heavy RainHeavy Rain at Te Puru
Map Location: -37.046216 175.518472
Comments:

Physical CharacteristicPuru recorded 166.3 mm (16.6 cm) of rain in 24 hours up to 9 a.m. on th 12th.

Multi HazardMulti Hazard at Thames
Map Location: -37.140988 175.533107
Comments:

ImpactCyclone Alison, brought high winds and gusty rain to most of the area on the 11th, causing power faults on the coast and wrecking prized gardens in Thames

DamageNo boat damages were reported.

Heavy RainHeavy Rain
Comments:

Physical CharacteristicThames recorded 80 mm (8.0 cm) of rain in 24 hours up to 9 a.m. on th 12th.

FloodingFlooding
Comments:

ImpactThe Kauaeranga River overlapped it banks to cover much of the Parawai floodway.

CommentThere were no reports of flooding of any consequence.

High Wind GustsHigh Wind / Gust
Comments:

Affected LifelineThe wind brought down trees across lines or blew over power poles. Some areas were still without power on the 12th.

ImpactThe gale force winds played havoc with gardens throughout the area, while streets and roads were littered with leaves and branches.

DamageMany advertising signs were destroyed and other road signs wre left at odd angles.

Heavy RainHeavy Rain at Waitawheta
Map Location: -37.43747 175.7724
Comments:

Physical CharacteristicWaitawheta recorded 138 mm (13.8 cm) of rain in 24 hours.

High Wind GustsHigh Wind / Gust at Wharekaho Beach
Map Location: -36.796141 175.723155
Comments:

Property DamageAt Simpsons Beach, a bach was toppled off its foundations and a phone box in the town was blown over.

Multi HazardMulti Hazard at Whitianga
Map Location: -36.834317 175.692086
Comments:

ImpactHeavy rain accompanied gale force winds and caused minor flooding and dirty brown seas in the harbour and inner part of Mercury Bay.

High Wind GustsHigh Wind / Gust
Comments:

Affected LifelineThe township had some minor power problems.

ImpactHigh winds blew a large sign down off the roof of a local garage and a 16 ft boat on its trailer from the garage in which it was berthed on to the road.

DamageMinor damages occurred over a widespread area the most serious reported being the complete demolition of a steel clad garage at Wharekaho Beach.

DamageThere was damage to hoardings and T.V. aerials, broken telephone lines, uprooted trees and the capsize of a caravan.

LandslideLandslide
Comments:

Affected LifelineSlips on the Tapu Hill Road brought about temporary closures and the road via Tairua was closed for some time.

Bay of Plenty

High Wind GustsHigh Wind / Gust at Bay of Plenty
Comments:

DamageRoofs were torn from houses, trees were toppled and windows were blown in.

High Wind GustsHigh Wind / Gust at Waihi Beach
Map Location: -37.40049 175.94134
Comments:

Property DamageAt Waihi Beach, two houses lost their roofs and one bach was blown over.

Affected LifelinePower supplies were cut.

Hawke's Bay

Multi HazardMulti Hazard at Hawke's Bay
Comments:

Affected LifelineIn Central Hawke's Bay, slips, washouts, and flood waters blocked roads. Major damage was done on State Highway 50.

Affected LifelineCommunications were disrupted, and power cut.

ImpactSome schools were closed.

Crop DamageYoung apple tree blocks weree hard hit by winds and rain.

FloodingFlooding
Comments:

Affected LifelineSevere damage to the timber bridges across Waipawa, Tukituki and Makaretu rivers on State Highway 50 closed the highway for several weeks. Trees and timber debris transported by the floodwaters contributed importantly to the bridge damage.

Damage CostThe replacement cost for the bridges could be $1 million ($8,700,000 2008 dollars).

ImpactFarmland was affected.

Multi HazardMulti Hazard at Clive
Map Location: -39.586947 176.912721
Comments:

Crop DamageSome damage was done to crops at Clive.

FloodingFlooding
Comments:

CommentThe Ngaruroro River rose suddenly and broke through a stopbank into Muddy Creek at Clive on the 12th.

ImpactA small amount of land was flooded around School Road. There was surface flooding in paddocks.

Multi HazardMulti Hazard at Napier
Map Location: -39.502426 176.892804
Comments:

Affected LifelineNapier Airport was closed from 9am to 5pm on th 12th.

Heavy RainHeavy Rain at Ruahine Range
Comments:

Physical CharacteristicHowletts Hut recorded 480 mm (48.0 cm) of rain in 72 hours (Return Period more than 150 years).

Physical CharacteristicHowletts Hut recorded 305 mm (30.5 cm) of rain in 24 hours (Return Period more than 150 years).

Physical CharacteristicHut Ruin recorded 558 mm (55.8 cm) of rain in 72 hours (Return Period more than 150 years).

Physical CharacteristicHut Ruin recorded 251 mm (25.1 cm) of rain in 24 hours (Return Period more than 150 years).

Physical CharacteristicPark's Peak Hut recorded 539 mm (53.9cm) of rain in 72 hours (Return Period more than 150 years).

Physical CharacteristicPark's Peak Hut recorded 241 mm (24.1 cm) of rain in 24 hours (Return Period more than 150 years).

Physical CharacteristicPohatuhaha recorded 523 mm (52.3cm) of rain in 72 hours (Return Period more than 150 years).

Physical CharacteristicPohatuhaha recorded 234 mm (23.4 cm) of rain in 24 hours (Return Period more than 150 years).

Multi HazardMulti Hazard
Comments:

ImpactNew slips occurred widely even on well-forested slopes. Massive deposition resulted in the upper channels of many basins. Trees and timber debris, from erosion of forested areas, transported by the flood waters contributed to severe damage to three major bridges on State Highway 50.

High Wind GustsHigh Wind / Gust
Comments:

CommentThe high gusts recorded at Levin indicated some very strong winds over the Ruahine Ranges.

FloodingFlooding at Waipukurau
Map Location: -39.999445 176.562423
Comments:

Affected LifelineSewage systems were affected at Waipukurau.

Taranaki

Maritime / CoastalMaritime / Coastal at Port Taranaki
Map Location: -39.05755 174.028759
Comments:

ImpactPort Taranaki was left in havoc on the 12th as the cyclone whipped up high seas and gale force winds. Two small boats sank in the harbour.

Manawatu-Wanganui

Heavy RainHeavy Rain at Dannevirke
Map Location: -40.212104 176.095139
Comments:

Physical CharacteristicDannevirke recorded 114.6 mm (11.5 cm) of rain in 24 hours.

FloodingFlooding
Comments:

CommentFlash flooding occurred in Dannevirke on the 11th.

Affected LifelineThe water supply was affected.

Affected LifelineBridge approaches were washed away by rivers in flood.

ImpactFarms were flooded and littered with debris.

ImpactThe Kumeti River bed was lifted 4 ft (1.2 m) by stones and rubble brought down by the floods.

Heavy RainHeavy Rain at Pohangina Saddle
Map Location: -39.947316 176.122332
Comments:

Physical CharacteristicPohangina Saddle recorded 612 mm (61.2 cm) of rain in 72 hours (Return Period more than 150 years).

Physical CharacteristicPohangina Saddle recorded 389 mm (38.9 cm) of rain in 24 hours (Return Period more than 150 years).

Wellington

Multi HazardMulti Hazard at Wellington
Comments:

EvacueesSome South Wairarapa residents were evacuated.

Crop DamageCrops were flattened.

DamageMinor damage was done in Wellington on the 12th.

Affected LifelineTrains were delayed.

FloodingFlooding
Comments:

Affected LifelineIn South Wairarapa, rivers were high and roads were flooded.

High Wind GustsHigh Wind / Gust
Comments:

Physical CharacteristicGale force north-east-easterly winds gusted to 50 knots (93 km/hr).

FloodingFlooding at Carterton
Map Location: -41.024015 175.535635
Comments:

Affected LifelineThe Carterton water supply was discoloured.

High Wind GustsHigh Wind / Gust at Castlepoint
Map Location: -40.89976 176.221927
Comments:

Physical CharacteristicCastlepoint recorded winds of 40 knots (74 km/hr).

Heavy RainHeavy Rain at Kapaitangata Stream
Map Location: -41.006316 175.458261
Comments:

Physical CharacteristicKaipaitangata recorded 133 mm (13.3 cm) of rain.

Physical CharacteristicKaipaitangata Valley recorded 139 mm (13.9 cm) of rain.

High Wind GustsHigh Wind / Gust at Kelburn
Map Location: -41.290129 174.76188
Comments:

Peak Wind SpeedKelburn recorded winds of up to 56 knots (104 km/hr).

High Wind GustsHigh Wind / Gust at Paekakariki
Map Location: -40.982766 174.944483
Comments:

Property DamageHigh winds caused an estimated $2000 ($17,000 2008 dollars) of damage to Paekakariki school. A bicycle shed was lifted and thrown through a fence, windows were broken, a doorway stoved in and a goalpost was snapped.

Property DamageRoofs were blown off and trees uprooted.

High Wind GustsHigh Wind / Gust at Upper Hutt
Map Location: -41.139372 175.055716
Comments:

CommentGolden coast and Upper Hutt felt the full force of the winds.

South Island

Multi HazardMulti Hazard at South Island
Comments:

Affected LifelineThere was no telephone communication between Nelson and Christchurch.

Marlborough

Heavy RainHeavy Rain at Marlborough
Comments:

CommentTorrential rain fell on Marlborough's east coast on the 12th.

FloodingFlooding
Comments:

Affected LifelineIn Marlborough, rivers flooded, and bridges and approaches were washed out. Several county bridges were torn out.

Affected LifelineThe state highway and main trunk line were blocked in several places by flood waters and washouts.

Property DamageMiles of fencing was damaged, and flatlands and pastures were ruined by rock.

FloodingFlooding at Awatere River
Map Location: -41.80418 173.79494
Comments:

Affected LifelineAwatere Valley Road was cut in several places.

LandslideLandslide at Blenheim
Map Location: -41.517124 173.949021
Comments:

Affected LifelineMany slips occurred on roads in Blenheim.

High Wind GustsHigh Wind / Gust
Comments:

Physical CharacteristicAt Blenheim, winds blew steadilyat 40 km/hr, with gusts up to 55 km/hr.

Heavy RainHeavy Rain at Cape Campbell
Map Location: -41.735514 174.276179
Comments:

Physical CharacteristicCape Campbell recorded 1 in (2.5 cm) of rain overnight on the 11th/12th.

High Wind GustsHigh Wind / Gust
Comments:

Physical CharacteristicAt Camp Campbell, winds gusted to 60 km/hr.

Maritime / CoastalMaritime / Coastal
Comments:

CommentThe sea was rough.

High Wind GustsHigh Wind / Gust at French Pass
Map Location: -40.926223 173.849713
Comments:

Affected LifelinePort Ligar and the French Pass were without power.

Heavy RainHeavy Rain at Hillersden
Map Location: -41.595835 173.43015
Comments:

Physical CharacteristicHillersden recorded 68.2 mm (6.8 cm) of rain in 48 hours.

Multi HazardMulti Hazard at Kenepuru Sound
Map Location: -41.200306 173.982021
Comments:

CommentHeavy rain and strong winds were experienced in the Kenepuru area.

High Wind GustsHigh Wind / Gust at Picton
Map Location: -41.295063 174.011495
Comments:

CommentPicton experienced gale force winds.

Physical CharacteristicAt Picton, winds gusted to 50 knots (93 km/hr).

Heavy RainHeavy Rain
Comments:

CommentThe wind was accompained by heavy rain. Heavy rain ceased late in the day on the 12th.

Physical CharacteristicPicton recorded 50 mm (5.0 cm) of rain in the 24 hours to 9am on the 12th.

Physical CharacteristicPicton recorded 1in (2.5 cm) of rain in the three hours from 9am to 12pm on the 12th.

ImpactPupils of Picton Borough School were sent home due to a leaking roof.

CommentThere was a deluge in the hills behind Esson's Valley.

FloodingFlooding
Comments:

ImpactFlood waters swirled around buildings in Picton.

CommentWaitohi Stream turned into a river. It was a torrent over 50 ft (15 m) wide in parts, carrying logs and debris.

CommentSandbags were placed on top of a stopbank at the Broadway bridge.

Affected LifelineAlexanders Motor Park was cut off from the road, with swirling water several feet deep across the bridge.

ImpactA creek behind Blue Anchor Motor Camp burst its banks.

Affected LifelineThe town's new water supply from Koromiko was out of action. Water supplies for the town were being taken from a dam on Waitohi Stream.

Affected LifelineThe single-lane bridge on Broadway was closed.

ImpactOne dwelling was flooded at Waikaka.

High Wind GustsHigh Wind / Gust at Port Ligar
Map Location: -40.930582 173.980989
Comments:

Affected LifelinePort Ligar and the French Pass were without power.

Multi HazardMulti Hazard at Port Underwood
Map Location: -41.335499 174.119054
Comments:

Affected LifelinePort Underwood Road was closed.

High Wind GustsHigh Wind / Gust at Rai Valley
Map Location: -41.228278 173.5715
Comments:

Affected LifelineRai Valley was without power.

FloodingFlooding at Seddon
Map Location: -41.674038 174.078006
Comments:

Affected LifelineSeddon was left without a water supply after flood water damaged the works in the Black Birch Stream.

Affected LifelineBridges were destroyed and several bridge approaches were washed out.

Property DamagePastures were ruined.

ImpactSeddon school was closed.

Heavy RainHeavy Rain at Wairau Valley
Map Location: -41.560319 173.527629
Comments:

Physical CharacteristicWairau Valley township recorded 82 mm (8.2 cm) of rain in 48 hours.

Heavy RainHeavy Rain at Wye River
Map Location: -41.65201 173.321263
Comments:

Physical CharacteristicWye recorded 63 mm (6.3 cm) of rain in 48 hours.

Tasman-Nelson

Multi HazardMulti Hazard at Tasman-Nelson
Comments:

ImpactTwo schools in the Nelson region were closed - Pakawau School and Tarakohe School.

Affected LifelineTelephone blackouts on the 12th isolated thousands of people in the Nelson province. About 670 phones were out of order.

Affected LifelineParts of the Neson district were without power for up to 12 hours, including Ngawhatu Hospital.

Heavy RainHeavy Rain
Comments:

Property DamageHeavy rain caused thousands of dollars of damage to many homes.

FloodingFlooding at Awaroa River
Map Location: -40.909104 172.982365
Comments:

CommentThe Awaroa River flooded to the highest known levels.

FloodingFlooding at Baton River
Map Location: -41.306365 172.74282
Comments:

CommentBaton River was at its highest level for 15 years.

FloodingFlooding at Golden Bay
Map Location: -40.698766 172.864683
Comments:

CommentTorrential rain caused extensive flooding in Golden Bay.

Declared EmergencyA Civil Defence Emergency was declared for Golden Bay on the 13th due to flooding in the area and build up of water behind the Cobb dam and the head of the Takaka Valley.

High Wind GustsHigh Wind / Gust
Comments:

Property DamageGale force winds ravaged Golden Bay, leaving a trail of damaged houses, demolished farm sheds and uprooted trees.

High Wind GustsHigh Wind / Gust at Golden Downs
Map Location: -41.544766 172.885072
Comments:

DamageAt Golden Downs, over 1000 acres (405 ha) of trees were damaged.

Damage CostMore than $1,000,000 ($8,700,000 2008 dollars) worth of damage was caused by Cyclone Alison which swept Golden Downs State Forest on the 11th and 12th. More than five million cubic feet of timber was estimated to have been blown down.

Maritime / CoastalMaritime / Coastal at Honeymoon Bay
Map Location: -41.03157 173.021576
Comments:

DamageAt Honeymoon Bay, most of the sand was swept away from the beach.

Maritime / CoastalMaritime / Coastal at Kaiteriteri
Map Location: -41.039225 173.018605
Comments:

DamagePleasure craft at Kaiteriteri took a severe pounding on the 12th. Only three of 14 boats moored in the bay remained afloat, and two were broken up on the foreshore.

ImpactOne man came close to drowning at Kaiteriteri.

DamageVirtually all the sand on the northern end of the beach was swept away.

Maritime / CoastalMaritime / Coastal at Marahau
Map Location: -41.005008 173.008492
Comments:

DamageSerious beach erosion occurred at Marahau.

High Wind GustsHigh Wind / Gust at Motupipi
Map Location: -40.857679 172.848357
Comments:

Property DamageA house at Motupipi lost part of its roof.

Heavy RainHeavy Rain at Nelson City
Map Location: -41.268476 173.297338
Comments:

ImpactHeavy rain in parts of the Nelson district on the 13th, brought some minor flooding.

High Wind GustsHigh Wind / Gust
Comments:

Property DamageAt Nelson, trees were uprooted, fences and sheds wrecked, and cars damaged by flying debris.

Property DamageRoofs and roof tiles were lifted, a caravan was smashed and a glasshouse demolished. Four houses had their roofs ripped off by wind. Two of the houses needed to be rebuilt inside after water got onto the ceilings, which then collapsed.

Affected LifelinePower cuts were experienced and phones were out. Ngawhatu Hospital was without power.

Crop DamageOrchards were stripped and commercial glasshouse growers suffered. One grower lost two glasshouses of a total of 9000 sq ft (836 m^2) and another five 150 ft by 30 ft (46 m by 9 m) houses.

Affected LifelineFlights were cancelled.

Damage1500 acres (607 ha) of native bush was flattened.

Physical CharacteristicWinds gusts were estimated at up to 100 knots (185 km/hr) at the brow of the hill.

Physical CharacteristicAt Stoke, winds gusted up to 68 knots (126 km/hr).

Peak Wind SpeedNelson recorded south-easterly gusts of up to 75 kt (139 km/hr).

CommentMeasured winds were unusually high at Nelson.

Maritime / CoastalMaritime / Coastal
Comments:

DamageSmall craft were battered.

Multi HazardMulti Hazard
Comments:

ImpactStoke school was closed.

Property DamageThousands of dollars worth of damage was done by water in roofless houses in upper Warehouse Street.

Multi HazardMulti Hazard at Pakawau
Map Location: -40.597581 172.688268
Comments:

Affected LifelinePakawau School had no power or water.

Maritime / CoastalMaritime / Coastal
Comments:

Affected LifelineHeavy seas that crashed in the breakwater damaged the road at Pakawau, which was closed to Mangarakau and Puponga traffic.

DamageSerious sea erosion occurred at Pakawau.

Maritime / CoastalMaritime / Coastal at Rabbit Island
Map Location: -41.271475 173.135625
Comments:

DamageSerious beach erosion occurred at several points on Rabbit Island.

High Wind GustsHigh Wind / Gust
Comments:

DamageThe wind snapped 100 acres (40.5 ha) of trees throughout the Rabbit Island plantations.

FloodingFlooding at Riwaka River
Map Location: -41.054077 172.959725
Comments:

CommentThe Riwaka River was in flood.

Maritime / CoastalMaritime / Coastal at Ruby Bay
Map Location: -41.229196 173.089619
Comments:

DamageSerious sea erosion occurred around the Ruby Bay coastline.

Heavy RainHeavy Rain at Takaka
Map Location: -40.854005 172.800335
Comments:

CommentHeavy rain fell in Takaka.

FloodingFlooding
Comments:

Affected LifelineA telephone pole was washed out on mud flats, leaving 50 telephone connections out.

Affected LifelineFloodwater from the Takaka River blocked the main highway and Bridges Hollow south of the township.

FloodingFlooding at Takaka River
Map Location: -41.110911 172.717408
Comments:

CommentThe Takaka River was at a higher level than in 1972, but not as high as in the 1967 flood.

FloodingFlooding at Tarakohe
Map Location: -40.828006 172.885766
Comments:

ImpactTarakohe School closed due to the sole teacher being unable to get through the floods.

High Wind GustsHigh Wind / Gust at Tata Beach
Map Location: -40.812271 172.913645
Comments:

Property DamageA house at Tata Beach had its roof lifted off.

Heavy RainHeavy Rain at Uruwhenua
Map Location: -40.989111 172.822509
Comments:

Physical CharacteristicUruwhenua recorded 152 mm (15.2 cm) of rain in the 24 hours to 8am on the 13th.

FloodingFlooding
Comments:

Affected LifelineThe road was blocked at Cottons Creek near Uruwhenua.

West Coast

High Wind GustsHigh Wind / Gust at Greymouth
Map Location: -42.451212 171.206779
Comments:

DamageGreymouth received the greatest wind damage in living memory.

Property DamageThe wind tore roofs off buildings and demolished Victoria Park.

High Wind GustsHigh Wind / Gust at Westport
Map Location: -41.750212 171.582563
Comments:

CommentCyclone Alison was positioned 100 miles west of Westport on the 13th.

Physical CharacteristicWestport recorded north-east winds of 22 knots (41 km/hr) on the 13th.

Peak Wind SpeedWestport recorded gusts of up to 86.4 mph (139 km/hr) on the 13th.

Canterbury

Heavy RainHeavy Rain at Canterbury
Comments:

CommentEx-tropical Cyclone Alison caused heavy rain along the Kaikoura Coast

Multi HazardMulti Hazard
Comments:

Affected LifelineState Highway 1 and the South Island Main Trunk Railway were closed by 85 slips and washouts from Kaikoura to Clarence. Severe rail and bridge damage occurred, and some motorists were trapped.

ImpactThe Kaikoura Coast was declared a disaster area on the 17th.

FloodingFlooding
Comments:

Affected LifelineHeavy rain caused number of washouts on a number of secondary highway bridges and culverts.

Heavy RainHeavy Rain at Blue Duck Creek
Map Location: -42.277617 173.750434
Comments:

Physical CharacteristicBlue Duck received about 400 mm (40.0 cm) of rain in 24 hours.

Heavy RainHeavy Rain at Christchurch
Map Location: -43.53112 172.636147
Comments:

Physical CharacteristicChristchurch Airport recorded 101.5 mm (10.2 cm) of rain in 24 hours (Return Period 35 years).

Physical CharacteristicChristchurch Airport recorded 98 mm (9.8 cm) of rain in 12 hours (Return Period about 100 years).

Physical CharacteristicChristchurch Airport recorded 80 mm (8.0 cm) of rain in six hours (Return Period 150 years).

CommentThe downpour in Christchurch was a "once in 200 years" occurrence, the Weather Office reported.

FloodingFlooding
Comments:

InjuriesSome people were injured when a car fell into a road subsidence.

ImpactSchools were closed.

Affected LifelineChristchurch city was flooded.

EvacueesFamilies were marooned and evacuated.

ImpactHouses and businesses were flooded in Addington.

Crop DamageMarket garden crops were damaged. Acres of surface water covered paddocks and washed out crops.

ImpactIn 1975, houses were flooded to above-floor level by the Heathcote River.

CommentThe worst affected were parts of St Albans, Riccarton, Addington and Linwood.

FloodingFlooding at Deadman Stream
Map Location: -42.043432 173.949453
Comments:

Affected LifelineAt Deadmans Creek, the river swelled to a raging torrent, and washed out half of the northern approach to the bridge.

Affected LifelineThe main trunk link beside the highway was impassable due to undermining.

Heavy RainHeavy Rain at Kaikoura
Map Location: -42.402255 173.685685
Comments:

Physical CharacteristicKaikoura township recorded 212 mm (21.2 cm) of rain in the 24 hours to 8am on the 13th.

Physical CharacteristicKaikoura Met recorded 205 mm (20.5 cm) of rain in 24 hours (Return Period 65 years).

Physical CharacteristicKaikoura Met recorded 193 mm (19.3 cm) of rain in 12 hours (Return Period more than 200 years).

Physical CharacteristicKaikoura Met recorded 155 mm (15.5 cm) of rain in six hours (Return Period more than 200 years).

Physical CharacteristicKaikoura recorded a rainfall intensity of 25 mm/hr (2.5 cm/hr) between 6pm and 10:30pm on the 12th.

CommentKaikoura had a return period of more than 100 years for rainfalls of six-, 12- and 24-hour durations.

CommentThe computed return period for the high intensity rainfalls of 6 and 12 hours accompanying Cyclone Alison exceeded 200 years at the Kaikoura Peninsula meteorological station.

CommentThe computed return period for the 24 hour high intensity rainfall accompanying Cyclone Alison exceeded 200 years at the Kaikoura Peninsula meteorological station.

DamageIn a 48 hour period from 9 a.m. on 11 March 1975, much of the coastal area surrounding Kaikoura was severely damaged by high intensity rainfalls.

Multi HazardMulti Hazard
Comments:

Affected LifelineThe Kaikoura township was isolated. State Highway 1 and the Main Trunk Railway were closed by numerous landslides, flood debris and washouts. The railway was not reopened until 25 March. The Main Trunk line was a shambles between Parikawa and just north of Clarence. In some places railway lines swung above washouts 18 feet (5.5 m) deep and 150 feet (46 m) long.

CommentKaikoura and the surrounding district were declared a disaster area on the 17 March 1975.

Affected LifelineTelephone lines were brought down in several places.

Affected LifelineNo goods or passenger trains were running.

Damage CostExtensive regolish mass movements occurred within the steep coastal catchments, and rapid stream aggradation and erosion caused damage to the highway and railway. Highway and railway reconstruction following Cyclone Alison exceeded $1,000,000 ($8,700,000 2008 dollars).

FloodingFlooding
Comments:

CommentMajor rivers were swollen by flood waters and Lyell Creek overflowed.

ImpactFlood waters entered a number of houses and shops on the 12th. Water entered several shops on the seawards side of the road.

ImpactThe business area was flooded.

Physical Characteristic2 ft (60 cm) of water flowed through the West End business area.

Affected LifelineThe bridge over Lyell Creek broke in two when the centre piers collapsed. A footbridge across Lyell Creek was also damaged.

Affected LifelineSouth of Kaikoura major flood damage occurred to the State Highway 1 in the Hundalee Hills and on the adjacent coastal section to the railway immediately north and south of Haumuri Tunnel. Most roads in the area were damaged by flooding.

Physical CharacteristicWaters swept through houses and the business district. In the township, the main shopping area had two feet (0.61 m) of water flowing down the thoroughfare.

LandslideLandslide
Comments:

EvacueesSix homes along a hillside at East End were evacuated when slips threatened to push the houses off their foundaions.

Affected LifelineOn State Highway 1, there were 27 slips in the 15 miles between Clarence and Mangamanu.

FloodingFlooding at Motunau River
Map Location: -43.047377 173.078871
Comments:

DamageTwo fishing boats were wrecked and four others damaged when they broke their moorings at the Motunua River mouth and were swept out to sea.

Multi HazardMulti Hazard at Kekerengu
Map Location: -42.003758 174.009837
Comments:

CommentKekerengu experienced heavy rain and high winds.

CasualtiesA 59-year-old woman died in a car accident on the 12th on the flooded highway south of Kekerengu.

InjuriesIn the same accident, an 8-month-old girl received a broken leg and cuts to her head.

Affected LifelineThe 100-foot (30-metre) bridge across the Kekerengu River was almost was washed out.

Multi HazardMulti Hazard at Waipapa Bay
Map Location: -42.162894 173.909798
Comments:

Affected LifelineThe railway line was pushed 20 yards (6 m) out of alignment by slips and floodwater.

Otago

FloodingFlooding at Oamaru
Map Location: -45.087138 170.980874
Comments:

Affected LifelineAt Oamaru, there was severe flooding in town streets.

References

Bell, D.H. (1976). High intensity rainstorms and geological hazards: Cyclone Alison, March 1975, Kaikoura, New Zealand. Bulletin of Engineering Geology and the Environment, 13(1), pp 189-200.
Grant, P.J., Hawkins, N.V. and Christie, W. (1978). Rainfalls and floods of Cyclone Alison March 1975 on the north-eastern Ruahine Range. Water and Soil Division, Ministry of Works and Development for the National Water and Soil Conservation Organisation, Wellington.
Headline: Wind Hazard.
Hessell, J.W.D.; Holloway, R.H.F.; Knowles, D.G.; Roberts, J.L. (1984). Scientific, Economic and Social Reviews of Natural Hazards in New Zealand. New Zealand National Commission For UNESCO, Wellington.
Major weather events in New Zealand, Floods and High Rainfall to 31st May 2006.
Major weather events in New Zealand, Floods and High Rainfall, Floods to 30 Sep 2005.
Major weather events in New Zealand, Floods and High Rainfall, Floods to 31st July 2006.
New Zealand Meteorological Service. (2008). Meteorology of Extreme Rainfalls in New Zealand (Mark Pascoe, Ed.).
Headline: High Winds And Flooding Cut Power.
Thames Star, 12 March (Wednesday) 1975.
Headline: Cyclone 'Alison' Hits' Whitianga.
Thames Star, 13 March (Thrusday) 1975.
Headline: Alison deals NZ a big buffet, but damage not widespread.
The Evening Post, 12 March 1975.
Headline: Cyclone Alison claims the life of four-year-old girl.
The Hawkes Bay Herald-Tribune, 12 March 1975.
Headline: Bridges smashed-bill may be $1m.
The Hawke's Bay Herald-Tribune, 13 March 1975.
Headline: East Clive safe after frantic night.
The Hawke's Bay Herald-Tribune, 13 March 1975.
Headline: Fatal crash on highway flooded by big storm.
The Hawkes Bay Herald-Tribune, 13 March 1975.
Headline: Winds damage young blocks of apple trees.
The Hawke's Bay Herald-Tribune, 13 March 1975.
Headline: "Big blow" not so bad in Blenheim……Yet!
The Marlborough Express, 12 March 1975.
Headline: Kaikoura mops mess up after inch an hour hits town.
The Marlborough Express, 13 March 1975.
Headline: Storm wreaks havoc along East Coast.
The Marlborough Express, 13 March 1975.
Headline: Trail of minor damage left by Picton flooding.
The Marlborough Express, 13 March 1975.
The Nelson Evening Mail, 13 March 1975. Headline Storm smashes Kaiteriteri fleet.
Headline: Alison hovers near Westport.
The Nelson Evening Mail, 13 March 1975.
Headline: Forest havoc in cyclone's wake.
The Nelson Evening Mail, 13 March 1975.
Headline: GB floods follow gale.
The Nelson Evening Mail, 13 March 1975.
Headline: GB schools may be closed.
The Nelson Evening Mail, 13 March 1975.
Headline: Rain drenches roofless homes.
The Nelson Evening Mail, 13 March 1975.
Headline: Severed lines cut off thousands.
The Nelson Evening Mail, 13 March 1975.
Headline: Big Blow and Rain In Offing.
The New Zealand Herald, 10 March (Monday) 1975.
Headline: Taste of Cyclone Alison, Rain And Wind Lash City.
The New Zealand Herald, 12 March (Wednesday) 1975.
Headline: Inch an Hour Fall Floods Kaikoura.
The New Zealand Herald, 13 March (Thursday) 1975.
Headline: Wind, Seas Halted Wharf Work.
The New Zealand Herald, 13 March (Thursday) 1975.
Headline: Freight Run Cut After Flood Chaos.
The New Zealand Herald, 14 March (Frioday) 1975.
Headline: Flooding Causes Costly Damage.
The New Zealand Herald, 15 March (Saturday) 1975.
Headline: Heathcote flood damage warning.
The Press, 29 December 1997.
The Waikato Times, 12 March 1975. Child dies during cyclone's lashing.
Tomlinson, A.I. (1975). New Zealand Meteorological Service: Cyclone Alison. Technical Information Circular No. 148.
Headline: Gale Force Winds Leave Trail of Damage.
Waihi Gazette, 13 March (Thursday) 1975.
Headline: $1m Damage Caused By Alison.
Waikato Times, 14 March (Friday) 1975.

ExtremeMarch 1975 New Zealand Ex-tropical Cyclone Alison ( 1975-03-10 )

35-200+ years

Ex-tropical Cyclone Alison caused high winds, heavy rain, flooding, slips and high seas around many parts of New Zealand. Much damage was done to roads, rail and both public and private property. A girl died in the Waikato after she touched a felled electric wire. A car accident on a flooded road in Canterbury saw one woman killed and a girl injured. Some people were also injured when a car fell into a road subsidence in Christchurch.

New Zealand

Multi HazardMulti Hazard at New Zealand
Duration:   5  days - From the 10th to the 14th of March.
Comments:

CauseThe remains of Tropical Cyclone Alison. Cyclone Alison moved southwards, passing west of the country during the 11th to the 14th. On the 11th and 12th, a strong northeast airstream was flowing onto the South Island. The storm was centred off the western side of the North Island, and drifted down the Taranaki coast and onto Buller and Westland.

CauseAnecdotal reports suggest that, at a time when the wind was destroying property in Greymouth, it was flat calm in Kaikoura, but coming down “in buckets”. Orographic enhancement of very moist, humid tropical air was obviously a major contributor to heavy rain. An anticyclone passing south of the South Island helped maintain a very strong pressure gradient on the south-eastern flank of the low, and also ingested some cold air into the system. The low weakened as the high moved away.

DamageScattered damage occurred over much of New Zealand. Trees were uprooted, house roofs lifted, boats sunk, and farms and towns were flooded, all the way from Northland to Otago.

Northland

High Wind GustsHigh Wind / Gust at Northland
Comments:

Affected LifelineNorthland was lashed by the cyclone on the 11th and telephone and power services in many areas were disrupted.

Affected LifelineAll toll links with Dargaville were cut. Communications with Kaitaia were cut. Some areas further north, including the Cape Reinga lighthouse, were cut off.

High Wind GustsHigh Wind / Gust at Whangarei
Map Location: -35.719519 174.298397
Comments:

Physical CharacteristicWhangarei airport reported one gust of 63 knots (117 km/hr) at 1.40pm on the 11th.

Auckland

Multi HazardMulti Hazard at Auckland
Comments:

CommentThe storm on the 11th was the worst storm in Auckland in 15 years.

Multi HazardMulti Hazard at Auckland City
Map Location: -36.852397 174.762337
Comments:

CommentFierce, gusting winds and torrential rain occurred in Auckland on the 11th. Cyclone Alison was centred about 180 miles north-west of the city on the 11th. The centre of the cyclone was expected to hit the Taranaki Bight on the night of the 12th, then move across the North lsland toward Hawkes Bay and the BOP.

Physical CharacteristicAuckland recorded 28 mm (2.8 cm) of rain between noon and 10pm on the 11th.

FloodingFlooding
Comments:

Affected LifelineScores of cars were stranded all over the city as water ran inches deep in many streets.

High Wind GustsHigh Wind / Gust
Comments:

Physical CharacteristicAuckland was lashed by gusts of up to 55 knots 102 km/hr).

Affected LifelineThe storm brought down power lines in many parts of the city. Falling trees and branches were largely to blame. The areas that suffered the most were Orakei, Remuera and Mangere.

Multi HazardMulti Hazard at Henderson
Map Location: -36.880798 174.619453
Comments:

Crop DamageThe storm came at the worst possible time for Henderson orchardists. Peaches, just ready for picking, were damaged by the driving rain and strong winds.

Heavy RainHeavy Rain at Howick
Map Location: -36.896907 174.926193
Comments:

ImpactA torrential downpour hit part of Auckland on the 14th and caused extensive flooding in Howick and Glenowie, and thousands of dollars in damage.

Physical CharacteristicA back yard rain gauge in Auckland recorded 4 in (10.16 cm) in 45 minutes.

FloodingFlooding
Comments:

Damage CostThe Howick branch of the Manukau Knitting Mills Ltd was severely hit. The factory floor was covered for a time in three feet (0.91 m) of water and large amounts of stock were ruined and machinery damaged. The damage to this factory was estimated at more than $100,000 ($901,000 2010 dollars).

ImpactIn Juliet St, Howick, basements were flooded as drain tops were blown off by water pressure.

DamageBehar Presses N.Z. Ltd. Of Vincent St, Howick, lost all of its stock. Five feet (1.52 m) of water covered the floor and it was found that the pressure had lifted the floor three feet (0.91 m) from the foundations.

High Wind GustsHigh Wind / Gust at Manurewa
Map Location: -37.027498 174.880907
Comments:

ImpactAbout 1100 pupils at the James Cook High School were sent home as gusts of wind tore tiles from the roof.

Maritime / CoastalMaritime / Coastal at Northcote
Map Location: -36.814428 174.741753
Comments:

Damage CostA near-new yacht sank off Northcote Point. It was worth $40,000 ($350,000 2008 dollars).

High Wind GustsHigh Wind / Gust at Waitemata Harbour
Map Location: -36.831068 174.743854
Comments:

Peak Wind SpeedAuckland Harbour recorded winds of up to 65 mph (105 km/hr).

Physical CharacteristicIn the Hauraki Gulf the winds reached 70 knots (130 km/hr) whipping up high seas which ripped boats from their moorings in the Waitemata Harbour.

ImpactThe storm brought work on ships at Fergusson Wharf to a halt for two days until the 12th. Ships were delayed and cargo work was disrupted by the storm.

ImpactThe Auckland Launch and Towboat Company had a busy day on the 12th salvaging about half a dozen yachts and small craft. Most spare Harbour Board craft were busy salvaging pleasure craft which had broken their moorings.

DamageA 35-foot ketch Sea Call was dashed onto the rocks. A 38-foot launch Te Kowhai was smashed against the sea wall in Okahu Bay. The launch was valued at about $15,000 ($135,000 2010 dollars). A 38-foot sloop, moored at Northcote, was torn free and driven aground, where she promptly sank.

High Wind GustsHigh Wind / Gust at Warkworth
Map Location: -36.40461 174.668477
Comments:

Affected LifelineState Highway 1, north of Warkworth, was blocked by a fallen tree on the 11th for half an hour.

Waikato

High Wind GustsHigh Wind / Gust at Waikato
Comments:

DamageTrees were uprooted.

Crop DamageFruit was damaged in orchards.

Affected LifelinePower cuts were widespread.

Affected LifelinePhone lines between Te Awamutu and Kawhia were cut for a short period.

Physical CharacteristicThe Piako County experienced gale force winds up to 70 knots (130 km/hr).

Affected LifelineTrees were blown down and roads blocked in the Piako County.

Multi HazardMulti Hazard
Comments:

Affected LifelineRoads were affected by slips and flooding.

DamageGale force winds and heavy rain left a trail of damage in the Thames-Coromandel District.

Affected LifelinePower faults occurred in the Thames-Coromandel District.

Affected LifelineHeavy rain closed the Kopu-Hikuai road.

ImpactThere was one minor road accident in the Waikato.

FloodingFlooding at Awaroa River
Map Location: -38.17467 174.943199
Comments:

CommentThe Awaroa Rivers flooded to the highest level in memory.

Multi HazardMulti Hazard at Hahei
Map Location: -36.841594 175.798359
Comments:

Affected LifelineThe Hahei area was without power and telephone for some hours.

Multi HazardMulti Hazard at Hamilton
Map Location: -37.780816 175.272836
Comments:

Affected LifelineHamilton Airport was closed from 4:30pm on the 11th until the morning of the 12th.

High Wind GustsHigh Wind / Gust
Comments:

Physical CharacteristicHamilton Airport recorded wind gusts of up to 40 knots (74 km/hr).

FloodingFlooding at Hikuai
Map Location: -37.070762 175.773609
Comments:

Affected LifelineHikuai was without power from midnight on the 11th, and road flooding had prevented access to the town until late morning of the 12th.

Affected LifelineThere was several feet of water over S.H. 25 at Hikuai.

Affected LifelineThe Tapu Creek Road was without power from midnight until 8 a.m. on the 12th because of flooding.

Affected LifelineThe coast road between Waikawau and Wilsons Bay was without power after a pole was washed out near Waikawau Bridge.

Multi HazardMulti Hazard at Hot Water Beach
Map Location: -36.889153 175.824915
Comments:

Affected LifelineThe Hot Water Beach area was without power and telephone for some hours.

FloodingFlooding at Kauri Stream
Map Location: -37.862429 174.888384
Comments:

CommentThe Kauri River flooded to the highest level in memory.

High Wind GustsHigh Wind / Gust at Manawaru
Map Location: -37.63416 175.76652
Comments:

DamagePupils from Manawaru School were sent home. The storm took the roof off a prefabricated classroom, lifted the roof off a junior classroom and cut off water and power supplies.

Multi HazardMulti Hazard at Matamata
Map Location: -37.806306 175.778708
Comments:

DamageHigh winds and heavy rain left a trail of damage throughout the Matamata area.

Affected LifelinePower faults occurred, and waterworks were affected.

High Wind GustsHigh Wind / Gust
Comments:

DamageTrees were uprooted.

High Wind GustsHigh Wind / Gust at Morrinsville
Map Location: -37.653686 175.524375
Comments:

Affected LifelinePower lines were downed in Morrinsville.

Affected LifelineSix trees fell across the highway between Morrinsville and Te Aroha.

Heavy RainHeavy Rain at Oparau
Map Location: -38.051476 174.927192
Comments:

Physical CharacteristicOparau recorded 127 mm (12.7 cm) of rain.

High Wind GustsHigh Wind / Gust at Otorohanga
Map Location: -38.174188 175.209784
Comments:

Property DamageAt Otorohanga, sheds were demolished and trees uprooted.

Affected LifelinePower and telephone lines were down.

High Wind GustsHigh Wind / Gust at Raglan
Map Location: -37.797036 174.865014
Comments:

DamageA boat tore free from moorings at Raglan and was blown onto rocks.

Affected LifelineResidents between Te Uku and Raglan were without power several times on the night of the 11th as high winds battered the area.

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

Affected LifelineRotorua Airport was closed.

High Wind GustsHigh Wind / Gust
Comments:

CommentRotorua experienced gale force winds.

FloodingFlooding
Comments:

CommentSurface flooding occurred.

High Wind GustsHigh Wind / Gust at Rotowaro
Map Location: -37.588372 175.066658
Comments:

CasualtiesA 4-year-old girl died in Rotowaro on the 11th when she touched a live wire brought down into a backyard by high winds.

Affected LifelinePhone and power wires were broken.

DamageTrees were broken.

Heavy RainHeavy Rain at Rukuhia
Map Location: -37.852626 175.309282
Comments:

Physical CharacteristicRukuhia recorded 48 mm (4.8 cm) of rain in 24 hours.

Heavy RainHeavy Rain at Te Aroha
Map Location: -37.536498 175.715457
Comments:

Physical CharacteristicTe Aroha recorded 150 mm (15.0 cm) of rain in 24 hours.

High Wind GustsHigh Wind / Gust
Comments:

Property DamageA school at Te Aroha lost some roofing.

Affected LifelinePower lines were downed in Te Aroha.

FloodingFlooding
Comments:

ImpactThere was minor flooding and a few trees down, but rivers did not go beyond the 'fresh' level.

FloodingFlooding at Te Awamutu
Map Location: -38.009384 175.334988
Comments:

CommentFlooding occurred at Te Awamutu.

Stock DamageSheep were lost.

DamageTrees were blown down.

Affected LifelineThe winds blew power lines down.

Heavy RainHeavy Rain at Te Puru
Map Location: -37.046216 175.518472
Comments:

Physical CharacteristicPuru recorded 166.3 mm (16.6 cm) of rain in 24 hours up to 9 a.m. on th 12th.

Multi HazardMulti Hazard at Thames
Map Location: -37.140988 175.533107
Comments:

ImpactCyclone Alison, brought high winds and gusty rain to most of the area on the 11th, causing power faults on the coast and wrecking prized gardens in Thames

DamageNo boat damages were reported.

Heavy RainHeavy Rain
Comments:

Physical CharacteristicThames recorded 80 mm (8.0 cm) of rain in 24 hours up to 9 a.m. on th 12th.

FloodingFlooding
Comments:

ImpactThe Kauaeranga River overlapped it banks to cover much of the Parawai floodway.

CommentThere were no reports of flooding of any consequence.

High Wind GustsHigh Wind / Gust
Comments:

Affected LifelineThe wind brought down trees across lines or blew over power poles. Some areas were still without power on the 12th.

ImpactThe gale force winds played havoc with gardens throughout the area, while streets and roads were littered with leaves and branches.

DamageMany advertising signs were destroyed and other road signs wre left at odd angles.

Heavy RainHeavy Rain at Waitawheta
Map Location: -37.43747 175.7724
Comments:

Physical CharacteristicWaitawheta recorded 138 mm (13.8 cm) of rain in 24 hours.

High Wind GustsHigh Wind / Gust at Wharekaho Beach
Map Location: -36.796141 175.723155
Comments:

Property DamageAt Simpsons Beach, a bach was toppled off its foundations and a phone box in the town was blown over.

Multi HazardMulti Hazard at Whitianga
Map Location: -36.834317 175.692086
Comments:

ImpactHeavy rain accompanied gale force winds and caused minor flooding and dirty brown seas in the harbour and inner part of Mercury Bay.

High Wind GustsHigh Wind / Gust
Comments:

Affected LifelineThe township had some minor power problems.

ImpactHigh winds blew a large sign down off the roof of a local garage and a 16 ft boat on its trailer from the garage in which it was berthed on to the road.

DamageMinor damages occurred over a widespread area the most serious reported being the complete demolition of a steel clad garage at Wharekaho Beach.

DamageThere was damage to hoardings and T.V. aerials, broken telephone lines, uprooted trees and the capsize of a caravan.

LandslideLandslide
Comments:

Affected LifelineSlips on the Tapu Hill Road brought about temporary closures and the road via Tairua was closed for some time.

Bay of Plenty

High Wind GustsHigh Wind / Gust at Bay of Plenty
Comments:

DamageRoofs were torn from houses, trees were toppled and windows were blown in.

High Wind GustsHigh Wind / Gust at Waihi Beach
Map Location: -37.40049 175.94134
Comments:

Property DamageAt Waihi Beach, two houses lost their roofs and one bach was blown over.

Affected LifelinePower supplies were cut.

Hawke's Bay

Multi HazardMulti Hazard at Hawke's Bay
Comments:

Affected LifelineIn Central Hawke's Bay, slips, washouts, and flood waters blocked roads. Major damage was done on State Highway 50.

Affected LifelineCommunications were disrupted, and power cut.

ImpactSome schools were closed.

Crop DamageYoung apple tree blocks weree hard hit by winds and rain.

FloodingFlooding
Comments:

Affected LifelineSevere damage to the timber bridges across Waipawa, Tukituki and Makaretu rivers on State Highway 50 closed the highway for several weeks. Trees and timber debris transported by the floodwaters contributed importantly to the bridge damage.

Damage CostThe replacement cost for the bridges could be $1 million ($8,700,000 2008 dollars).

ImpactFarmland was affected.

Multi HazardMulti Hazard at Clive
Map Location: -39.586947 176.912721
Comments:

Crop DamageSome damage was done to crops at Clive.

FloodingFlooding
Comments:

CommentThe Ngaruroro River rose suddenly and broke through a stopbank into Muddy Creek at Clive on the 12th.

ImpactA small amount of land was flooded around School Road. There was surface flooding in paddocks.

Multi HazardMulti Hazard at Napier
Map Location: -39.502426 176.892804
Comments:

Affected LifelineNapier Airport was closed from 9am to 5pm on th 12th.

Heavy RainHeavy Rain at Ruahine Range
Comments:

Physical CharacteristicHowletts Hut recorded 480 mm (48.0 cm) of rain in 72 hours (Return Period more than 150 years).

Physical CharacteristicHowletts Hut recorded 305 mm (30.5 cm) of rain in 24 hours (Return Period more than 150 years).

Physical CharacteristicHut Ruin recorded 558 mm (55.8 cm) of rain in 72 hours (Return Period more than 150 years).

Physical CharacteristicHut Ruin recorded 251 mm (25.1 cm) of rain in 24 hours (Return Period more than 150 years).

Physical CharacteristicPark's Peak Hut recorded 539 mm (53.9cm) of rain in 72 hours (Return Period more than 150 years).

Physical CharacteristicPark's Peak Hut recorded 241 mm (24.1 cm) of rain in 24 hours (Return Period more than 150 years).

Physical CharacteristicPohatuhaha recorded 523 mm (52.3cm) of rain in 72 hours (Return Period more than 150 years).

Physical CharacteristicPohatuhaha recorded 234 mm (23.4 cm) of rain in 24 hours (Return Period more than 150 years).

Multi HazardMulti Hazard
Comments:

ImpactNew slips occurred widely even on well-forested slopes. Massive deposition resulted in the upper channels of many basins. Trees and timber debris, from erosion of forested areas, transported by the flood waters contributed to severe damage to three major bridges on State Highway 50.

High Wind GustsHigh Wind / Gust
Comments:

CommentThe high gusts recorded at Levin indicated some very strong winds over the Ruahine Ranges.

FloodingFlooding at Waipukurau
Map Location: -39.999445 176.562423
Comments:

Affected LifelineSewage systems were affected at Waipukurau.

Taranaki

Maritime / CoastalMaritime / Coastal at Port Taranaki
Map Location: -39.05755 174.028759
Comments:

ImpactPort Taranaki was left in havoc on the 12th as the cyclone whipped up high seas and gale force winds. Two small boats sank in the harbour.

Manawatu-Wanganui

Heavy RainHeavy Rain at Dannevirke
Map Location: -40.212104 176.095139
Comments:

Physical CharacteristicDannevirke recorded 114.6 mm (11.5 cm) of rain in 24 hours.

FloodingFlooding
Comments:

CommentFlash flooding occurred in Dannevirke on the 11th.

Affected LifelineThe water supply was affected.

Affected LifelineBridge approaches were washed away by rivers in flood.

ImpactFarms were flooded and littered with debris.

ImpactThe Kumeti River bed was lifted 4 ft (1.2 m) by stones and rubble brought down by the floods.

Heavy RainHeavy Rain at Pohangina Saddle
Map Location: -39.947316 176.122332
Comments:

Physical CharacteristicPohangina Saddle recorded 612 mm (61.2 cm) of rain in 72 hours (Return Period more than 150 years).

Physical CharacteristicPohangina Saddle recorded 389 mm (38.9 cm) of rain in 24 hours (Return Period more than 150 years).

Wellington

Multi HazardMulti Hazard at Wellington
Comments:

EvacueesSome South Wairarapa residents were evacuated.

Crop DamageCrops were flattened.

DamageMinor damage was done in Wellington on the 12th.

Affected LifelineTrains were delayed.

FloodingFlooding
Comments:

Affected LifelineIn South Wairarapa, rivers were high and roads were flooded.

High Wind GustsHigh Wind / Gust
Comments:

Physical CharacteristicGale force north-east-easterly winds gusted to 50 knots (93 km/hr).

FloodingFlooding at Carterton
Map Location: -41.024015 175.535635
Comments:

Affected LifelineThe Carterton water supply was discoloured.

High Wind GustsHigh Wind / Gust at Castlepoint
Map Location: -40.89976 176.221927
Comments:

Physical CharacteristicCastlepoint recorded winds of 40 knots (74 km/hr).

Heavy RainHeavy Rain at Kapaitangata Stream
Map Location: -41.006316 175.458261
Comments:

Physical CharacteristicKaipaitangata recorded 133 mm (13.3 cm) of rain.

Physical CharacteristicKaipaitangata Valley recorded 139 mm (13.9 cm) of rain.

High Wind GustsHigh Wind / Gust at Kelburn
Map Location: -41.290129 174.76188
Comments:

Peak Wind SpeedKelburn recorded winds of up to 56 knots (104 km/hr).

High Wind GustsHigh Wind / Gust at Paekakariki
Map Location: -40.982766 174.944483
Comments:

Property DamageHigh winds caused an estimated $2000 ($17,000 2008 dollars) of damage to Paekakariki school. A bicycle shed was lifted and thrown through a fence, windows were broken, a doorway stoved in and a goalpost was snapped.

Property DamageRoofs were blown off and trees uprooted.

High Wind GustsHigh Wind / Gust at Upper Hutt
Map Location: -41.139372 175.055716
Comments:

CommentGolden coast and Upper Hutt felt the full force of the winds.

South Island

Multi HazardMulti Hazard at South Island
Comments:

Affected LifelineThere was no telephone communication between Nelson and Christchurch.

Marlborough

Heavy RainHeavy Rain at Marlborough
Comments:

CommentTorrential rain fell on Marlborough's east coast on the 12th.

FloodingFlooding
Comments:

Affected LifelineIn Marlborough, rivers flooded, and bridges and approaches were washed out. Several county bridges were torn out.

Affected LifelineThe state highway and main trunk line were blocked in several places by flood waters and washouts.

Property DamageMiles of fencing was damaged, and flatlands and pastures were ruined by rock.

FloodingFlooding at Awatere River
Map Location: -41.80418 173.79494
Comments:

Affected LifelineAwatere Valley Road was cut in several places.

LandslideLandslide at Blenheim
Map Location: -41.517124 173.949021
Comments:

Affected LifelineMany slips occurred on roads in Blenheim.

High Wind GustsHigh Wind / Gust
Comments:

Physical CharacteristicAt Blenheim, winds blew steadilyat 40 km/hr, with gusts up to 55 km/hr.

Heavy RainHeavy Rain at Cape Campbell
Map Location: -41.735514 174.276179
Comments:

Physical CharacteristicCape Campbell recorded 1 in (2.5 cm) of rain overnight on the 11th/12th.

High Wind GustsHigh Wind / Gust
Comments:

Physical CharacteristicAt Camp Campbell, winds gusted to 60 km/hr.

Maritime / CoastalMaritime / Coastal
Comments:

CommentThe sea was rough.

High Wind GustsHigh Wind / Gust at French Pass
Map Location: -40.926223 173.849713
Comments:

Affected LifelinePort Ligar and the French Pass were without power.

Heavy RainHeavy Rain at Hillersden
Map Location: -41.595835 173.43015
Comments:

Physical CharacteristicHillersden recorded 68.2 mm (6.8 cm) of rain in 48 hours.

Multi HazardMulti Hazard at Kenepuru Sound
Map Location: -41.200306 173.982021
Comments:

CommentHeavy rain and strong winds were experienced in the Kenepuru area.

High Wind GustsHigh Wind / Gust at Picton
Map Location: -41.295063 174.011495
Comments:

CommentPicton experienced gale force winds.

Physical CharacteristicAt Picton, winds gusted to 50 knots (93 km/hr).

Heavy RainHeavy Rain
Comments:

CommentThe wind was accompained by heavy rain. Heavy rain ceased late in the day on the 12th.

Physical CharacteristicPicton recorded 50 mm (5.0 cm) of rain in the 24 hours to 9am on the 12th.

Physical CharacteristicPicton recorded 1in (2.5 cm) of rain in the three hours from 9am to 12pm on the 12th.

ImpactPupils of Picton Borough School were sent home due to a leaking roof.

CommentThere was a deluge in the hills behind Esson's Valley.

FloodingFlooding
Comments:

ImpactFlood waters swirled around buildings in Picton.

CommentWaitohi Stream turned into a river. It was a torrent over 50 ft (15 m) wide in parts, carrying logs and debris.

CommentSandbags were placed on top of a stopbank at the Broadway bridge.

Affected LifelineAlexanders Motor Park was cut off from the road, with swirling water several feet deep across the bridge.

ImpactA creek behind Blue Anchor Motor Camp burst its banks.

Affected LifelineThe town's new water supply from Koromiko was out of action. Water supplies for the town were being taken from a dam on Waitohi Stream.

Affected LifelineThe single-lane bridge on Broadway was closed.

ImpactOne dwelling was flooded at Waikaka.

High Wind GustsHigh Wind / Gust at Port Ligar
Map Location: -40.930582 173.980989
Comments:

Affected LifelinePort Ligar and the French Pass were without power.

Multi HazardMulti Hazard at Port Underwood
Map Location: -41.335499 174.119054
Comments:

Affected LifelinePort Underwood Road was closed.

High Wind GustsHigh Wind / Gust at Rai Valley
Map Location: -41.228278 173.5715
Comments:

Affected LifelineRai Valley was without power.

FloodingFlooding at Seddon
Map Location: -41.674038 174.078006
Comments:

Affected LifelineSeddon was left without a water supply after flood water damaged the works in the Black Birch Stream.

Affected LifelineBridges were destroyed and several bridge approaches were washed out.

Property DamagePastures were ruined.

ImpactSeddon school was closed.

Heavy RainHeavy Rain at Wairau Valley
Map Location: -41.560319 173.527629
Comments:

Physical CharacteristicWairau Valley township recorded 82 mm (8.2 cm) of rain in 48 hours.

Heavy RainHeavy Rain at Wye River
Map Location: -41.65201 173.321263
Comments:

Physical CharacteristicWye recorded 63 mm (6.3 cm) of rain in 48 hours.

Tasman-Nelson

Multi HazardMulti Hazard at Tasman-Nelson
Comments:

ImpactTwo schools in the Nelson region were closed - Pakawau School and Tarakohe School.

Affected LifelineTelephone blackouts on the 12th isolated thousands of people in the Nelson province. About 670 phones were out of order.

Affected LifelineParts of the Neson district were without power for up to 12 hours, including Ngawhatu Hospital.

Heavy RainHeavy Rain
Comments:

Property DamageHeavy rain caused thousands of dollars of damage to many homes.

FloodingFlooding at Awaroa River
Map Location: -40.909104 172.982365
Comments:

CommentThe Awaroa River flooded to the highest known levels.

FloodingFlooding at Baton River
Map Location: -41.306365 172.74282
Comments:

CommentBaton River was at its highest level for 15 years.

FloodingFlooding at Golden Bay
Map Location: -40.698766 172.864683
Comments:

CommentTorrential rain caused extensive flooding in Golden Bay.

Declared EmergencyA Civil Defence Emergency was declared for Golden Bay on the 13th due to flooding in the area and build up of water behind the Cobb dam and the head of the Takaka Valley.

High Wind GustsHigh Wind / Gust
Comments:

Property DamageGale force winds ravaged Golden Bay, leaving a trail of damaged houses, demolished farm sheds and uprooted trees.

High Wind GustsHigh Wind / Gust at Golden Downs
Map Location: -41.544766 172.885072
Comments:

DamageAt Golden Downs, over 1000 acres (405 ha) of trees were damaged.

Damage CostMore than $1,000,000 ($8,700,000 2008 dollars) worth of damage was caused by Cyclone Alison which swept Golden Downs State Forest on the 11th and 12th. More than five million cubic feet of timber was estimated to have been blown down.

Maritime / CoastalMaritime / Coastal at Honeymoon Bay
Map Location: -41.03157 173.021576
Comments:

DamageAt Honeymoon Bay, most of the sand was swept away from the beach.

Maritime / CoastalMaritime / Coastal at Kaiteriteri
Map Location: -41.039225 173.018605
Comments:

DamagePleasure craft at Kaiteriteri took a severe pounding on the 12th. Only three of 14 boats moored in the bay remained afloat, and two were broken up on the foreshore.

ImpactOne man came close to drowning at Kaiteriteri.

DamageVirtually all the sand on the northern end of the beach was swept away.

Maritime / CoastalMaritime / Coastal at Marahau
Map Location: -41.005008 173.008492
Comments:

DamageSerious beach erosion occurred at Marahau.

High Wind GustsHigh Wind / Gust at Motupipi
Map Location: -40.857679 172.848357
Comments:

Property DamageA house at Motupipi lost part of its roof.

Heavy RainHeavy Rain at Nelson City
Map Location: -41.268476 173.297338
Comments:

ImpactHeavy rain in parts of the Nelson district on the 13th, brought some minor flooding.

High Wind GustsHigh Wind / Gust
Comments:

Property DamageAt Nelson, trees were uprooted, fences and sheds wrecked, and cars damaged by flying debris.

Property DamageRoofs and roof tiles were lifted, a caravan was smashed and a glasshouse demolished. Four houses had their roofs ripped off by wind. Two of the houses needed to be rebuilt inside after water got onto the ceilings, which then collapsed.

Affected LifelinePower cuts were experienced and phones were out. Ngawhatu Hospital was without power.

Crop DamageOrchards were stripped and commercial glasshouse growers suffered. One grower lost two glasshouses of a total of 9000 sq ft (836 m^2) and another five 150 ft by 30 ft (46 m by 9 m) houses.

Affected LifelineFlights were cancelled.

Damage1500 acres (607 ha) of native bush was flattened.

Physical CharacteristicWinds gusts were estimated at up to 100 knots (185 km/hr) at the brow of the hill.

Physical CharacteristicAt Stoke, winds gusted up to 68 knots (126 km/hr).

Peak Wind SpeedNelson recorded south-easterly gusts of up to 75 kt (139 km/hr).

CommentMeasured winds were unusually high at Nelson.

Maritime / CoastalMaritime / Coastal
Comments:

DamageSmall craft were battered.

Multi HazardMulti Hazard
Comments:

ImpactStoke school was closed.

Property DamageThousands of dollars worth of damage was done by water in roofless houses in upper Warehouse Street.

Multi HazardMulti Hazard at Pakawau
Map Location: -40.597581 172.688268
Comments:

Affected LifelinePakawau School had no power or water.

Maritime / CoastalMaritime / Coastal
Comments:

Affected LifelineHeavy seas that crashed in the breakwater damaged the road at Pakawau, which was closed to Mangarakau and Puponga traffic.

DamageSerious sea erosion occurred at Pakawau.

Maritime / CoastalMaritime / Coastal at Rabbit Island
Map Location: -41.271475 173.135625
Comments:

DamageSerious beach erosion occurred at several points on Rabbit Island.

High Wind GustsHigh Wind / Gust
Comments:

DamageThe wind snapped 100 acres (40.5 ha) of trees throughout the Rabbit Island plantations.

FloodingFlooding at Riwaka River
Map Location: -41.054077 172.959725
Comments:

CommentThe Riwaka River was in flood.

Maritime / CoastalMaritime / Coastal at Ruby Bay
Map Location: -41.229196 173.089619
Comments:

DamageSerious sea erosion occurred around the Ruby Bay coastline.

Heavy RainHeavy Rain at Takaka
Map Location: -40.854005 172.800335
Comments:

CommentHeavy rain fell in Takaka.

FloodingFlooding
Comments:

Affected LifelineA telephone pole was washed out on mud flats, leaving 50 telephone connections out.

Affected LifelineFloodwater from the Takaka River blocked the main highway and Bridges Hollow south of the township.

FloodingFlooding at Takaka River
Map Location: -41.110911 172.717408
Comments:

CommentThe Takaka River was at a higher level than in 1972, but not as high as in the 1967 flood.

FloodingFlooding at Tarakohe
Map Location: -40.828006 172.885766
Comments:

ImpactTarakohe School closed due to the sole teacher being unable to get through the floods.

High Wind GustsHigh Wind / Gust at Tata Beach
Map Location: -40.812271 172.913645
Comments:

Property DamageA house at Tata Beach had its roof lifted off.

Heavy RainHeavy Rain at Uruwhenua
Map Location: -40.989111 172.822509
Comments:

Physical CharacteristicUruwhenua recorded 152 mm (15.2 cm) of rain in the 24 hours to 8am on the 13th.

FloodingFlooding
Comments:

Affected LifelineThe road was blocked at Cottons Creek near Uruwhenua.

West Coast

High Wind GustsHigh Wind / Gust at Greymouth
Map Location: -42.451212 171.206779
Comments:

DamageGreymouth received the greatest wind damage in living memory.

Property DamageThe wind tore roofs off buildings and demolished Victoria Park.

High Wind GustsHigh Wind / Gust at Westport
Map Location: -41.750212 171.582563
Comments:

CommentCyclone Alison was positioned 100 miles west of Westport on the 13th.

Physical CharacteristicWestport recorded north-east winds of 22 knots (41 km/hr) on the 13th.

Peak Wind SpeedWestport recorded gusts of up to 86.4 mph (139 km/hr) on the 13th.

Canterbury

Heavy RainHeavy Rain at Canterbury
Comments:

CommentEx-tropical Cyclone Alison caused heavy rain along the Kaikoura Coast

Multi HazardMulti Hazard
Comments:

Affected LifelineState Highway 1 and the South Island Main Trunk Railway were closed by 85 slips and washouts from Kaikoura to Clarence. Severe rail and bridge damage occurred, and some motorists were trapped.

ImpactThe Kaikoura Coast was declared a disaster area on the 17th.

FloodingFlooding
Comments:

Affected LifelineHeavy rain caused number of washouts on a number of secondary highway bridges and culverts.

Heavy RainHeavy Rain at Blue Duck Creek
Map Location: -42.277617 173.750434
Comments:

Physical CharacteristicBlue Duck received about 400 mm (40.0 cm) of rain in 24 hours.

Heavy RainHeavy Rain at Christchurch
Map Location: -43.53112 172.636147
Comments:

Physical CharacteristicChristchurch Airport recorded 101.5 mm (10.2 cm) of rain in 24 hours (Return Period 35 years).

Physical CharacteristicChristchurch Airport recorded 98 mm (9.8 cm) of rain in 12 hours (Return Period about 100 years).

Physical CharacteristicChristchurch Airport recorded 80 mm (8.0 cm) of rain in six hours (Return Period 150 years).

CommentThe downpour in Christchurch was a "once in 200 years" occurrence, the Weather Office reported.

FloodingFlooding
Comments:

InjuriesSome people were injured when a car fell into a road subsidence.

ImpactSchools were closed.

Affected LifelineChristchurch city was flooded.

EvacueesFamilies were marooned and evacuated.

ImpactHouses and businesses were flooded in Addington.

Crop DamageMarket garden crops were damaged. Acres of surface water covered paddocks and washed out crops.

ImpactIn 1975, houses were flooded to above-floor level by the Heathcote River.

CommentThe worst affected were parts of St Albans, Riccarton, Addington and Linwood.

FloodingFlooding at Deadman Stream
Map Location: -42.043432 173.949453
Comments:

Affected LifelineAt Deadmans Creek, the river swelled to a raging torrent, and washed out half of the northern approach to the bridge.

Affected LifelineThe main trunk link beside the highway was impassable due to undermining.

Heavy RainHeavy Rain at Kaikoura
Map Location: -42.402255 173.685685
Comments:

Physical CharacteristicKaikoura township recorded 212 mm (21.2 cm) of rain in the 24 hours to 8am on the 13th.

Physical CharacteristicKaikoura Met recorded 205 mm (20.5 cm) of rain in 24 hours (Return Period 65 years).

Physical CharacteristicKaikoura Met recorded 193 mm (19.3 cm) of rain in 12 hours (Return Period more than 200 years).

Physical CharacteristicKaikoura Met recorded 155 mm (15.5 cm) of rain in six hours (Return Period more than 200 years).

Physical CharacteristicKaikoura recorded a rainfall intensity of 25 mm/hr (2.5 cm/hr) between 6pm and 10:30pm on the 12th.

CommentKaikoura had a return period of more than 100 years for rainfalls of six-, 12- and 24-hour durations.

CommentThe computed return period for the high intensity rainfalls of 6 and 12 hours accompanying Cyclone Alison exceeded 200 years at the Kaikoura Peninsula meteorological station.

CommentThe computed return period for the 24 hour high intensity rainfall accompanying Cyclone Alison exceeded 200 years at the Kaikoura Peninsula meteorological station.

DamageIn a 48 hour period from 9 a.m. on 11 March 1975, much of the coastal area surrounding Kaikoura was severely damaged by high intensity rainfalls.

Multi HazardMulti Hazard
Comments:

Affected LifelineThe Kaikoura township was isolated. State Highway 1 and the Main Trunk Railway were closed by numerous landslides, flood debris and washouts. The railway was not reopened until 25 March. The Main Trunk line was a shambles between Parikawa and just north of Clarence. In some places railway lines swung above washouts 18 feet (5.5 m) deep and 150 feet (46 m) long.

CommentKaikoura and the surrounding district were declared a disaster area on the 17 March 1975.

Affected LifelineTelephone lines were brought down in several places.

Affected LifelineNo goods or passenger trains were running.

Damage CostExtensive regolish mass movements occurred within the steep coastal catchments, and rapid stream aggradation and erosion caused damage to the highway and railway. Highway and railway reconstruction following Cyclone Alison exceeded $1,000,000 ($8,700,000 2008 dollars).

FloodingFlooding
Comments:

CommentMajor rivers were swollen by flood waters and Lyell Creek overflowed.

ImpactFlood waters entered a number of houses and shops on the 12th. Water entered several shops on the seawards side of the road.

ImpactThe business area was flooded.

Physical Characteristic2 ft (60 cm) of water flowed through the West End business area.

Affected LifelineThe bridge over Lyell Creek broke in two when the centre piers collapsed. A footbridge across Lyell Creek was also damaged.

Affected LifelineSouth of Kaikoura major flood damage occurred to the State Highway 1 in the Hundalee Hills and on the adjacent coastal section to the railway immediately north and south of Haumuri Tunnel. Most roads in the area were damaged by flooding.

Physical CharacteristicWaters swept through houses and the business district. In the township, the main shopping area had two feet (0.61 m) of water flowing down the thoroughfare.

LandslideLandslide
Comments:

EvacueesSix homes along a hillside at East End were evacuated when slips threatened to push the houses off their foundaions.

Affected LifelineOn State Highway 1, there were 27 slips in the 15 miles between Clarence and Mangamanu.

FloodingFlooding at Motunau River
Map Location: -43.047377 173.078871
Comments:

DamageTwo fishing boats were wrecked and four others damaged when they broke their moorings at the Motunua River mouth and were swept out to sea.

Multi HazardMulti Hazard at Kekerengu
Map Location: -42.003758 174.009837
Comments:

CommentKekerengu experienced heavy rain and high winds.

CasualtiesA 59-year-old woman died in a car accident on the 12th on the flooded highway south of Kekerengu.

InjuriesIn the same accident, an 8-month-old girl received a broken leg and cuts to her head.

Affected LifelineThe 100-foot (30-metre) bridge across the Kekerengu River was almost was washed out.

Multi HazardMulti Hazard at Waipapa Bay
Map Location: -42.162894 173.909798
Comments:

Affected LifelineThe railway line was pushed 20 yards (6 m) out of alignment by slips and floodwater.

Otago

FloodingFlooding at Oamaru
Map Location: -45.087138 170.980874
Comments:

Affected LifelineAt Oamaru, there was severe flooding in town streets.

References

Bell, D.H. (1976). High intensity rainstorms and geological hazards: Cyclone Alison, March 1975, Kaikoura, New Zealand. Bulletin of Engineering Geology and the Environment, 13(1), pp 189-200.
Grant, P.J., Hawkins, N.V. and Christie, W. (1978). Rainfalls and floods of Cyclone Alison March 1975 on the north-eastern Ruahine Range. Water and Soil Division, Ministry of Works and Development for the National Water and Soil Conservation Organisation, Wellington.
Headline: Wind Hazard.
Hessell, J.W.D.; Holloway, R.H.F.; Knowles, D.G.; Roberts, J.L. (1984). Scientific, Economic and Social Reviews of Natural Hazards in New Zealand. New Zealand National Commission For UNESCO, Wellington.
Major weather events in New Zealand, Floods and High Rainfall to 31st May 2006.
Major weather events in New Zealand, Floods and High Rainfall, Floods to 30 Sep 2005.
Major weather events in New Zealand, Floods and High Rainfall, Floods to 31st July 2006.
New Zealand Meteorological Service. (2008). Meteorology of Extreme Rainfalls in New Zealand (Mark Pascoe, Ed.).
Headline: High Winds And Flooding Cut Power.
Thames Star, 12 March (Wednesday) 1975.
Headline: Cyclone 'Alison' Hits' Whitianga.
Thames Star, 13 March (Thrusday) 1975.
Headline: Alison deals NZ a big buffet, but damage not widespread.
The Evening Post, 12 March 1975.
Headline: Cyclone Alison claims the life of four-year-old girl.
The Hawkes Bay Herald-Tribune, 12 March 1975.
Headline: Bridges smashed-bill may be $1m.
The Hawke's Bay Herald-Tribune, 13 March 1975.
Headline: East Clive safe after frantic night.
The Hawke's Bay Herald-Tribune, 13 March 1975.
Headline: Fatal crash on highway flooded by big storm.
The Hawkes Bay Herald-Tribune, 13 March 1975.
Headline: Winds damage young blocks of apple trees.
The Hawke's Bay Herald-Tribune, 13 March 1975.
Headline: "Big blow" not so bad in Blenheim……Yet!
The Marlborough Express, 12 March 1975.
Headline: Kaikoura mops mess up after inch an hour hits town.
The Marlborough Express, 13 March 1975.
Headline: Storm wreaks havoc along East Coast.
The Marlborough Express, 13 March 1975.
Headline: Trail of minor damage left by Picton flooding.
The Marlborough Express, 13 March 1975.
The Nelson Evening Mail, 13 March 1975. Headline Storm smashes Kaiteriteri fleet.
Headline: Alison hovers near Westport.
The Nelson Evening Mail, 13 March 1975.
Headline: Forest havoc in cyclone's wake.
The Nelson Evening Mail, 13 March 1975.
Headline: GB floods follow gale.
The Nelson Evening Mail, 13 March 1975.
Headline: GB schools may be closed.
The Nelson Evening Mail, 13 March 1975.
Headline: Rain drenches roofless homes.
The Nelson Evening Mail, 13 March 1975.
Headline: Severed lines cut off thousands.
The Nelson Evening Mail, 13 March 1975.
Headline: Big Blow and Rain In Offing.
The New Zealand Herald, 10 March (Monday) 1975.
Headline: Taste of Cyclone Alison, Rain And Wind Lash City.
The New Zealand Herald, 12 March (Wednesday) 1975.
Headline: Inch an Hour Fall Floods Kaikoura.
The New Zealand Herald, 13 March (Thursday) 1975.
Headline: Wind, Seas Halted Wharf Work.
The New Zealand Herald, 13 March (Thursday) 1975.
Headline: Freight Run Cut After Flood Chaos.
The New Zealand Herald, 14 March (Frioday) 1975.
Headline: Flooding Causes Costly Damage.
The New Zealand Herald, 15 March (Saturday) 1975.
Headline: Heathcote flood damage warning.
The Press, 29 December 1997.
The Waikato Times, 12 March 1975. Child dies during cyclone's lashing.
Tomlinson, A.I. (1975). New Zealand Meteorological Service: Cyclone Alison. Technical Information Circular No. 148.
Headline: Gale Force Winds Leave Trail of Damage.
Waihi Gazette, 13 March (Thursday) 1975.
Headline: $1m Damage Caused By Alison.
Waikato Times, 14 March (Friday) 1975.