NZ Historic Weather Events Catalogue

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March 1920 North Island Flooding ( 1920-03-26 )

A storm brought heavy rain, flooding and high winds to parts of Northland, Auckland and Gisborne. Six people were drowned in Northland.

North Island

Multi HazardMulti Hazard at North Island
Duration:   4  days - From the 26th till the 29th of March.
Comments:
Maritime / CoastalMaritime / Coastal
Comments:

Affected LifelineDuring the weekend the Northern Co.'s steamers on the East Coast of the upper North Island had a particularly rough trip.

Northland

LightningLightning at Northland
Comments:

CommentOn the evening of the 26th an electrical storm moved over the country from the north-east, bringing vivid and frequent lightning.

Heavy RainHeavy Rain
Comments:

CommentThe lightning was accompanied by a torrential rainfall.

CommentThe rainfall appeared to have been greater in the back-block areas and southward towards Waipu, Maungaturoto and Paparoa.

FloodingFlooding
Comments:

CommentAll rivers and creeks flooded rapidly and overflowed their banks in some places. The flood waters disappeared rapidly in outlying districts and districts nearer Whangarei.

ImpactLarge areas of land were inundated.

CommentDuring the early hours of the 27th the storm abated somewhat and the flood in the rivers went down a little. Heavy rain returned at midday on the 27th and caused rivers to rise again.

Stock DamageThere were serious stock losses, with many reports of cattle and sheep losses from all districts. One farmer reported that he had lost over 2000 sheep.

Affected LifelineCommunication was severed, with slips and washouts blocking roads and railway lines.

Damage CostDamage to county roads totalled £5,300 ($424,100 2008 dollars).

DamageMost of the damage reported came from outlying districts.

Multi HazardMulti Hazard
Comments:

Affected LifelineThe road from Whangarei to Waipu was impassable. The road from Whangarei to Whakapara was impassable.

Heavy RainHeavy Rain at Dargaville
Map Location: -35.944137 173.869958
Comments:

CommentThis portion of Northern Wairoa had an exceptional downpour on the 26th and 27th.

Multi HazardMulti Hazard at Hukerenui
Map Location: -35.51942 174.190367
Comments:

Affected LifelineA man travelling between Hukerenui and Towai on the 27th was forced to abandon his car.

FloodingFlooding at Kaihu
Map Location: -35.770311 173.700017
Comments:

Affected LifelineThe Kaihu railway line was under water in places, but there were no serious washouts.

FloodingFlooding at Kirikopuni
Map Location: -35.84455 174.008588
Comments:

Affected LifelineKirikopuni bridge, between Dargaville and Whangarei, was seriously damaged. The piles of the bridge were broken after a boom of logs swung downstream against the Kirikopuni bridge, and it was put out of place by about 3 ft (90 cm).

Damage CostThe replacement cost for the bridge was between £3000-£4000 ($240,000-$320,100 2008 dollars).

ImpactThe country was flooded for miles.

Heavy RainHeavy Rain at Kiripaka
Map Location: -35.641646 174.426634
Comments:

CommentUnusually heavy rain fell on at Kiripaka on the 26th and 27th.

Multi HazardMulti Hazard
Comments:

ImpactThe mine was flooded and slips blocked the main adits. The tramway and bridges were washed away. Work would probably be suspended for weeks.

LandslideLandslide
Comments:

Property DamageA house was badly damaged by a slip 300 yards (270 m) in extent.

Affected LifelineHeavy slips occurred on all the roads and much damage was done to metalled roads.

FloodingFlooding at Mangakahia River
Map Location: -35.70094 173.951098
Comments:

ImpactThe Mangakahia district was heavily inundated as the rivers there overflowed in many places.

Stock DamageSeveral Mangakahia farmers had heavy stock losses. One had 220 wethers and 15 dairy heifers drowned, another lost an estimated 230 sheep, and another was reported to have lost 100 wethers.

Physical CharacteristicAt the Mangakahia bridge, the water reached almost to the level of the decking.

Affected LifelineThe Mangakahia road was closed.

FloodingFlooding at Maungakaramea
Map Location: -35.844153 174.205054
Comments:

Stock DamageA Maungakaramea farmer lost 21 bullocks in a creek in which timber had dammed up.

High Wind GustsHigh Wind / Gust at Onerahi
Map Location: -35.765579 174.360107
Comments:

CommentThe weather broke at Onerahi on the 26th, with a heavy wind from the east. Before midnight a full gale was rioting over the plateau.

Maritime / CoastalMaritime / Coastal
Comments:

DamageSome boats on the foreshore broke from their moorings. One launch foundered at anchor in the heavy sea and capsized. A barge broke away and was swept across the harbour among the Otaika mangroves. The Rothesay Bay, lying off Onerahi, dragged her anchors a little during the height of gale.

ImpactThe sea was so heavy that it was impossible to approach the Limestone wharf to pick up the mail.

FloodingFlooding at Otaika
Map Location: -35.786112 174.306319
Comments:

Affected LifelineBridges on the Otaika Road were under water. The Otaika bridge was impassable while the tide was high. Coward's bridge at Otaika was destroyed when the centre piles collapsed. It was the oldest bridge in the country.

ImpactThe flood caused a boom to carry away at Otaika, setting adrift 30,000 ft (9,144 m) of timber into the harbour.

FloodingFlooding at Otamatea River
Map Location: -36.216529 174.335836
Comments:

Affected Lifeline14 bridges in the Otamatea county were reported to have been either washed away or badly damaged.

FloodingFlooding at Paparoa
Map Location: -36.100175 174.23636
Comments:

DamageThe flooded Paparoa River caused very extensive damage.

CasualtiesA woman and three children were drowned in the Paparoa River after their cottage at the railway construction works in Upper Paparoa Valley was carried away by the flood, and they were all thrown into the water. The flood rose suddenly rose and swept away the camp where the family were living, reaching the beds at 4am. The husband and two children survived.

CasualtiesA man's body was recovered from the flooded river after he had been seen swimming.

ImpactA man in the Paparoa district spent six hours perched in a tree before he was rescued. A woman was also recovered from a tree in which she had taken refuge with her baby.

Property DamageSeveral buildings in the township were flooded on the night of the 26th to a depth of several feet. One kitchen was washed out of position.

ImpactBusiness in the township was practically suspended.

Multi HazardMulti Hazard
Comments:

Affected LifelineCommunication with Paparoa by road was practically blocked by damaged bridges and landslides. Enormous damage was done to roads and bridges throughout the dsitrict.

LandslideLandslide at Parua Bay
Map Location: -35.768282 174.458587
Comments:

Affected LifelineSlips were particularly numerous on roads in the hill country at Waikaraka and Parua Bay.

FloodingFlooding at Poroti
Map Location: -35.735178 174.121282
Comments:

DamageA man's buggy was washed away and the horse drowned, found between Poroti and the Wairua bridge. The man was fine.

LandslideLandslide at Ruatangata West
Map Location: -35.66112 174.17358
Comments:

Affected LifelineThere was a serious slip on the Whangarei-Kawakawa railway at the old scoria shute at Ruatangata, which caused delays.

LandslideLandslide at Waikaraka
Map Location: -35.757151 174.383712
Comments:

Affected LifelineSlips were particularly numerous on roads in the hill country at Waikaraka and Parua Bay.

DamageOn the Waikaraka ranges patches of bush were swept away and the hillsides were scored with the tracks of huge landslides.

FloodingFlooding at Waikiekie
Map Location: -35.947949 174.22966
Comments:

Affected LifelineThere were a number of washouts on roads and scouring of bridge approaches reported from Waikiekie.

FloodingFlooding at Waiotira
Comments:

Affected LifelineThere were a number of washouts on the railway construction works at Waiotira.

FloodingFlooding at Waipu
Map Location: -35.985133 174.45213
Comments:

ImpactAt Waipu, the rivers were high in flood and all the flats and low-lying country was inundated.

Property DamageMany outhouses were destroyed.

Stock DamageFowls were lost.

Peak River FlowThe Waipu River at Durham's Bridge had a peak discharge of 20,670 cusecs (585 cumecs).

Peak River FlowThe Waipu River at McLennan's Bridge had a peak discharge of 25,241 cusecs (715 cumecs).

Peak River FlowThe Waipu River at Ferry Bridge had a peak discharge of 30,000 cusecs (850 cumecs).

LandslideLandslide
Comments:

Affected LifelineA lot of landslips occurred, particularly in the direction of Finlaysons Brook.

Multi HazardMulti Hazard
Comments:

Affected LifelineMail contractors had the utmost difficuly in getting through to Waipu from Marsden Point. There was no outward mail from there on the 27th.

FloodingFlooding at Waipu Gorge Forest
Map Location: -36.050292 174.400245
Comments:

Affected LifelineIn the Waipu Gorge 25 bridges were washed away by the rush of water. Durham's bridge at the mouth of the Gorge had "gone west". The Ferry bridge was seriously damaged, with one end of it washed downstream. The Waipu Gorge road was reported to be absolutely impassable.

CasualtiesA man drowned after a motor car fell through a gap in a bridge into the river. It was possible there were more occupants, but no more bodies were recovered.

FloodingFlooding at Wairoa River
Map Location: -35.819736 174.05412
Comments:

DamageThere was heavy flood damage in the Upper Wairoa.

Stock DamageA few head of stock were reported to have drowned.

Crop DamageMaize fields in the district were ruined.

Physical CharacteristicThe Wairua River rose 4 ft (1.2 m) within an hour.

CommentLogs were carried down the Wairoa River.

Heavy RainHeavy Rain at Wairua Falls
Map Location: -35.745955 174.084431
Comments:

Physical CharacteristicWairua Falls recorded 9.00 in (22.9 cm) of rain in 24 hours. This was considered to be a record 24-hour rainfall for the district.

Physical CharacteristicThe Wairua Falls power station was had water 7ft 6in deep (2.3 m) around it on the 27th before water was let through the building.

Multi HazardMulti Hazard at Whangarei
Map Location: -35.719519 174.298397
Comments:

CommentAt Whangarei, rain was accompanied by lightning and gales.

Heavy RainHeavy Rain
Comments:

Physical CharacteristicWhangarei recorded 4.39 in (11.2 cm) of rain in the 24 hours to 8am on the 27th.

Peak RainfallWhangarei recorded 5.33 in (13.5 cm) of rain in the 24 hours to 8am on the 28th. The rain on the 27th was a much more steady downpour.

Physical CharacteristicWhangarei recorded 0.13 in (0.3 cm) of rain in the 24 hours to 8am on the 29th.

FloodingFlooding
Comments:

CommentSerious flooding occurred in Whangarei. Both the Waiariki and the Waiarohia were in high flood.

Affected LifelineThe Whangarei electricity supply was cut when the Wairua Falls Station was flooded. The Whangarei substation was also surrounded by water, and power had to be shut off four times for short periods from 11:30pm on the 26th. The flood mark at the power station gradually rose over 4 ft (1.2 m) on the 27th, and work had to be stopped and water let through the building. On the afternoon of the 27th the electricity was switched off and remained off until early on the morning of the 29th.

Affected LifelineThe roads south of Whangarei were almost impassable.

DamageWithin the borough the chief damage caused was in Kauika Road, near the bridge across Keri Keri Stream. Recent drainage operations led to scouring of the filling in of the drainage trench at the lower end.

ImpactThe low-lying land from the Dairy Factory to the Hatea River suffered. Some of the houses in low-lying areas within the borough were flooded again on the evning of the 27th. Damage was not extensive.

CommentSome launches and small boats were left high and almost dry when the river temporarily subsided.

DamageAt the town wharf, the only damage was the collapse of the rickety boat landing nearest to Victoria bridge.

ImpactA good deal of debris was brought down the river, which was up over the road between the wharf and the bridge.

CommentSuch a flood in Waimahanga had never been known before.

ImpactA grass flat at Waimahanga was strewn thick with the debris of broken trees and dead timber. Many outbuildings of the farm were under water. Horses stood in their stable in water more than knee deep and pigs had to swim around in thir sty to keep from drowning.

LandslideLandslide
Comments:

Affected LifelineThe nearest slip of any considerable size to the borough was one on Maunu hill, just below the Black bridge. The road was still passable for cars.

DamageFurther down the Keri Keri Stream a slip occurred in a property, and a plot of cabbages disappeared.

Maritime / CoastalMaritime / Coastal
Comments:

CommentCoastal shipping had a very rough time and many vessels had been sheltering.

Maritime / CoastalMaritime / Coastal at Whangarei Heads
Map Location: -35.813125 174.505465
Comments:

Affected LifelineThe Manaia had to turn back at the Whangarei Heads and afterwards had a rough passage to Auckland.

Auckland

Multi HazardMulti Hazard at Hoteo
Map Location: -36.384767 174.520862
Comments:

Affected LifelineDuring the weekend storm, all traffic was closed on the railway section between Hoteo and Wayby due to inundation and landslips and other debris on the track. The section was reopened on the 29th.

Maritime / CoastalMaritime / Coastal at Whangaparaoa Head
Map Location: -36.601869 174.840371
Comments:

Affected LifelineThe Apanui encountered the full force of the south-east gale off Whangaparaoa and was delayed.

InjuriesA woman passenger was thrown from a top berth to the floor and received facial injuries.

Gisborne

Heavy RainHeavy Rain at Gisborne
Comments:

CommentPhenomenally heavy rains were reported in the Waiapu district.

FloodingFlooding
Comments:

CommentRivers were in heavy flood.

Heavy RainHeavy Rain at Ahikoura
Comments:

Physical CharacteristicAhikoura recorded 9 in (22.9 cm) of rain in the 16 hours to 9am on the 27th.

Heavy RainHeavy Rain at Gisborne City
Map Location: -38.656661 178.017356
Comments:

Physical CharacteristicGisborne recorded 2 in (5.1 cm) of rain in three days.

Heavy RainHeavy Rain at Ruatoria
Map Location: -37.890508 178.310264
Comments:

Physical CharacteristicRuatoria recorded 18 1/2 in (47.0 cm) of rain in the 3 days to 9am on the 29th. This was the heaviest rainfall since February 1917.

FloodingFlooding
Comments:

CommentThere were enormous floods in the rivers.

Heavy RainHeavy Rain at Tokomaru Bay
Map Location: -38.12831 178.319381
Comments:

Physical CharacteristicTokomaru Bay recorded 14 in (35.6 cm) of rain.

Heavy RainHeavy Rain at Waipiro Bay
Map Location: -38.020822 178.331346
Comments:

Physical CharacteristicPuketiti and Waipiro recorded 17 in (43.2 cm) of rain.

References

Cowie, C.A.; Attwood, A.K. (1957). Floods in New Zealand 1920-1953. The Soil Conservation Control Council, Wellington, New Zealand.
Headline: A great flood.
The New Zealand Herald, 29 March 1920.
Headline: Floods in Upper Wairoa.
The New Zealand Herald, 29 March 1920.
Headline: Record floods.
The Northern Advocate, 27 March 1920.
Headline: A heavy fall.
Northern Advocate, 29 March 1920.
Headline: Flood toll: Drowning disasters.
The Northern Advocate, 29 March 1920.
Headline: Kiripaka fares badly.
The Northern Advocate, 29 March 1920.
Headline: Northern Wairoa.
The Northern Advocate, 29 March 1920.
Headline: Tuesday, March 30, 1920.
The Northern Advocate, 30 March 1920.
Headline: Rough weather on the East Coast.
The Northland Age, 1 April 1920.

March 1920 North Island Flooding ( 1920-03-26 )

A storm brought heavy rain, flooding and high winds to parts of Northland, Auckland and Gisborne. Six people were drowned in Northland.

North Island

Multi HazardMulti Hazard at North Island
Duration:   4  days - From the 26th till the 29th of March.
Comments:
Maritime / CoastalMaritime / Coastal
Comments:

Affected LifelineDuring the weekend the Northern Co.'s steamers on the East Coast of the upper North Island had a particularly rough trip.

Northland

LightningLightning at Northland
Comments:

CommentOn the evening of the 26th an electrical storm moved over the country from the north-east, bringing vivid and frequent lightning.

Heavy RainHeavy Rain
Comments:

CommentThe lightning was accompanied by a torrential rainfall.

CommentThe rainfall appeared to have been greater in the back-block areas and southward towards Waipu, Maungaturoto and Paparoa.

FloodingFlooding
Comments:

CommentAll rivers and creeks flooded rapidly and overflowed their banks in some places. The flood waters disappeared rapidly in outlying districts and districts nearer Whangarei.

ImpactLarge areas of land were inundated.

CommentDuring the early hours of the 27th the storm abated somewhat and the flood in the rivers went down a little. Heavy rain returned at midday on the 27th and caused rivers to rise again.

Stock DamageThere were serious stock losses, with many reports of cattle and sheep losses from all districts. One farmer reported that he had lost over 2000 sheep.

Affected LifelineCommunication was severed, with slips and washouts blocking roads and railway lines.

Damage CostDamage to county roads totalled £5,300 ($424,100 2008 dollars).

DamageMost of the damage reported came from outlying districts.

Multi HazardMulti Hazard
Comments:

Affected LifelineThe road from Whangarei to Waipu was impassable. The road from Whangarei to Whakapara was impassable.

Heavy RainHeavy Rain at Dargaville
Map Location: -35.944137 173.869958
Comments:

CommentThis portion of Northern Wairoa had an exceptional downpour on the 26th and 27th.

Multi HazardMulti Hazard at Hukerenui
Map Location: -35.51942 174.190367
Comments:

Affected LifelineA man travelling between Hukerenui and Towai on the 27th was forced to abandon his car.

FloodingFlooding at Kaihu
Map Location: -35.770311 173.700017
Comments:

Affected LifelineThe Kaihu railway line was under water in places, but there were no serious washouts.

FloodingFlooding at Kirikopuni
Map Location: -35.84455 174.008588
Comments:

Affected LifelineKirikopuni bridge, between Dargaville and Whangarei, was seriously damaged. The piles of the bridge were broken after a boom of logs swung downstream against the Kirikopuni bridge, and it was put out of place by about 3 ft (90 cm).

Damage CostThe replacement cost for the bridge was between £3000-£4000 ($240,000-$320,100 2008 dollars).

ImpactThe country was flooded for miles.

Heavy RainHeavy Rain at Kiripaka
Map Location: -35.641646 174.426634
Comments:

CommentUnusually heavy rain fell on at Kiripaka on the 26th and 27th.

Multi HazardMulti Hazard
Comments:

ImpactThe mine was flooded and slips blocked the main adits. The tramway and bridges were washed away. Work would probably be suspended for weeks.

LandslideLandslide
Comments:

Property DamageA house was badly damaged by a slip 300 yards (270 m) in extent.

Affected LifelineHeavy slips occurred on all the roads and much damage was done to metalled roads.

FloodingFlooding at Mangakahia River
Map Location: -35.70094 173.951098
Comments:

ImpactThe Mangakahia district was heavily inundated as the rivers there overflowed in many places.

Stock DamageSeveral Mangakahia farmers had heavy stock losses. One had 220 wethers and 15 dairy heifers drowned, another lost an estimated 230 sheep, and another was reported to have lost 100 wethers.

Physical CharacteristicAt the Mangakahia bridge, the water reached almost to the level of the decking.

Affected LifelineThe Mangakahia road was closed.

FloodingFlooding at Maungakaramea
Map Location: -35.844153 174.205054
Comments:

Stock DamageA Maungakaramea farmer lost 21 bullocks in a creek in which timber had dammed up.

High Wind GustsHigh Wind / Gust at Onerahi
Map Location: -35.765579 174.360107
Comments:

CommentThe weather broke at Onerahi on the 26th, with a heavy wind from the east. Before midnight a full gale was rioting over the plateau.

Maritime / CoastalMaritime / Coastal
Comments:

DamageSome boats on the foreshore broke from their moorings. One launch foundered at anchor in the heavy sea and capsized. A barge broke away and was swept across the harbour among the Otaika mangroves. The Rothesay Bay, lying off Onerahi, dragged her anchors a little during the height of gale.

ImpactThe sea was so heavy that it was impossible to approach the Limestone wharf to pick up the mail.

FloodingFlooding at Otaika
Map Location: -35.786112 174.306319
Comments:

Affected LifelineBridges on the Otaika Road were under water. The Otaika bridge was impassable while the tide was high. Coward's bridge at Otaika was destroyed when the centre piles collapsed. It was the oldest bridge in the country.

ImpactThe flood caused a boom to carry away at Otaika, setting adrift 30,000 ft (9,144 m) of timber into the harbour.

FloodingFlooding at Otamatea River
Map Location: -36.216529 174.335836
Comments:

Affected Lifeline14 bridges in the Otamatea county were reported to have been either washed away or badly damaged.

FloodingFlooding at Paparoa
Map Location: -36.100175 174.23636
Comments:

DamageThe flooded Paparoa River caused very extensive damage.

CasualtiesA woman and three children were drowned in the Paparoa River after their cottage at the railway construction works in Upper Paparoa Valley was carried away by the flood, and they were all thrown into the water. The flood rose suddenly rose and swept away the camp where the family were living, reaching the beds at 4am. The husband and two children survived.

CasualtiesA man's body was recovered from the flooded river after he had been seen swimming.

ImpactA man in the Paparoa district spent six hours perched in a tree before he was rescued. A woman was also recovered from a tree in which she had taken refuge with her baby.

Property DamageSeveral buildings in the township were flooded on the night of the 26th to a depth of several feet. One kitchen was washed out of position.

ImpactBusiness in the township was practically suspended.

Multi HazardMulti Hazard
Comments:

Affected LifelineCommunication with Paparoa by road was practically blocked by damaged bridges and landslides. Enormous damage was done to roads and bridges throughout the dsitrict.

LandslideLandslide at Parua Bay
Map Location: -35.768282 174.458587
Comments:

Affected LifelineSlips were particularly numerous on roads in the hill country at Waikaraka and Parua Bay.

FloodingFlooding at Poroti
Map Location: -35.735178 174.121282
Comments:

DamageA man's buggy was washed away and the horse drowned, found between Poroti and the Wairua bridge. The man was fine.

LandslideLandslide at Ruatangata West
Map Location: -35.66112 174.17358
Comments:

Affected LifelineThere was a serious slip on the Whangarei-Kawakawa railway at the old scoria shute at Ruatangata, which caused delays.

LandslideLandslide at Waikaraka
Map Location: -35.757151 174.383712
Comments:

Affected LifelineSlips were particularly numerous on roads in the hill country at Waikaraka and Parua Bay.

DamageOn the Waikaraka ranges patches of bush were swept away and the hillsides were scored with the tracks of huge landslides.

FloodingFlooding at Waikiekie
Map Location: -35.947949 174.22966
Comments:

Affected LifelineThere were a number of washouts on roads and scouring of bridge approaches reported from Waikiekie.

FloodingFlooding at Waiotira
Comments:

Affected LifelineThere were a number of washouts on the railway construction works at Waiotira.

FloodingFlooding at Waipu
Map Location: -35.985133 174.45213
Comments:

ImpactAt Waipu, the rivers were high in flood and all the flats and low-lying country was inundated.

Property DamageMany outhouses were destroyed.

Stock DamageFowls were lost.

Peak River FlowThe Waipu River at Durham's Bridge had a peak discharge of 20,670 cusecs (585 cumecs).

Peak River FlowThe Waipu River at McLennan's Bridge had a peak discharge of 25,241 cusecs (715 cumecs).

Peak River FlowThe Waipu River at Ferry Bridge had a peak discharge of 30,000 cusecs (850 cumecs).

LandslideLandslide
Comments:

Affected LifelineA lot of landslips occurred, particularly in the direction of Finlaysons Brook.

Multi HazardMulti Hazard
Comments:

Affected LifelineMail contractors had the utmost difficuly in getting through to Waipu from Marsden Point. There was no outward mail from there on the 27th.

FloodingFlooding at Waipu Gorge Forest
Map Location: -36.050292 174.400245
Comments:

Affected LifelineIn the Waipu Gorge 25 bridges were washed away by the rush of water. Durham's bridge at the mouth of the Gorge had "gone west". The Ferry bridge was seriously damaged, with one end of it washed downstream. The Waipu Gorge road was reported to be absolutely impassable.

CasualtiesA man drowned after a motor car fell through a gap in a bridge into the river. It was possible there were more occupants, but no more bodies were recovered.

FloodingFlooding at Wairoa River
Map Location: -35.819736 174.05412
Comments:

DamageThere was heavy flood damage in the Upper Wairoa.

Stock DamageA few head of stock were reported to have drowned.

Crop DamageMaize fields in the district were ruined.

Physical CharacteristicThe Wairua River rose 4 ft (1.2 m) within an hour.

CommentLogs were carried down the Wairoa River.

Heavy RainHeavy Rain at Wairua Falls
Map Location: -35.745955 174.084431
Comments:

Physical CharacteristicWairua Falls recorded 9.00 in (22.9 cm) of rain in 24 hours. This was considered to be a record 24-hour rainfall for the district.

Physical CharacteristicThe Wairua Falls power station was had water 7ft 6in deep (2.3 m) around it on the 27th before water was let through the building.

Multi HazardMulti Hazard at Whangarei
Map Location: -35.719519 174.298397
Comments:

CommentAt Whangarei, rain was accompanied by lightning and gales.

Heavy RainHeavy Rain
Comments:

Physical CharacteristicWhangarei recorded 4.39 in (11.2 cm) of rain in the 24 hours to 8am on the 27th.

Peak RainfallWhangarei recorded 5.33 in (13.5 cm) of rain in the 24 hours to 8am on the 28th. The rain on the 27th was a much more steady downpour.

Physical CharacteristicWhangarei recorded 0.13 in (0.3 cm) of rain in the 24 hours to 8am on the 29th.

FloodingFlooding
Comments:

CommentSerious flooding occurred in Whangarei. Both the Waiariki and the Waiarohia were in high flood.

Affected LifelineThe Whangarei electricity supply was cut when the Wairua Falls Station was flooded. The Whangarei substation was also surrounded by water, and power had to be shut off four times for short periods from 11:30pm on the 26th. The flood mark at the power station gradually rose over 4 ft (1.2 m) on the 27th, and work had to be stopped and water let through the building. On the afternoon of the 27th the electricity was switched off and remained off until early on the morning of the 29th.

Affected LifelineThe roads south of Whangarei were almost impassable.

DamageWithin the borough the chief damage caused was in Kauika Road, near the bridge across Keri Keri Stream. Recent drainage operations led to scouring of the filling in of the drainage trench at the lower end.

ImpactThe low-lying land from the Dairy Factory to the Hatea River suffered. Some of the houses in low-lying areas within the borough were flooded again on the evning of the 27th. Damage was not extensive.

CommentSome launches and small boats were left high and almost dry when the river temporarily subsided.

DamageAt the town wharf, the only damage was the collapse of the rickety boat landing nearest to Victoria bridge.

ImpactA good deal of debris was brought down the river, which was up over the road between the wharf and the bridge.

CommentSuch a flood in Waimahanga had never been known before.

ImpactA grass flat at Waimahanga was strewn thick with the debris of broken trees and dead timber. Many outbuildings of the farm were under water. Horses stood in their stable in water more than knee deep and pigs had to swim around in thir sty to keep from drowning.

LandslideLandslide
Comments:

Affected LifelineThe nearest slip of any considerable size to the borough was one on Maunu hill, just below the Black bridge. The road was still passable for cars.

DamageFurther down the Keri Keri Stream a slip occurred in a property, and a plot of cabbages disappeared.

Maritime / CoastalMaritime / Coastal
Comments:

CommentCoastal shipping had a very rough time and many vessels had been sheltering.

Maritime / CoastalMaritime / Coastal at Whangarei Heads
Map Location: -35.813125 174.505465
Comments:

Affected LifelineThe Manaia had to turn back at the Whangarei Heads and afterwards had a rough passage to Auckland.

Auckland

Multi HazardMulti Hazard at Hoteo
Map Location: -36.384767 174.520862
Comments:

Affected LifelineDuring the weekend storm, all traffic was closed on the railway section between Hoteo and Wayby due to inundation and landslips and other debris on the track. The section was reopened on the 29th.

Maritime / CoastalMaritime / Coastal at Whangaparaoa Head
Map Location: -36.601869 174.840371
Comments:

Affected LifelineThe Apanui encountered the full force of the south-east gale off Whangaparaoa and was delayed.

InjuriesA woman passenger was thrown from a top berth to the floor and received facial injuries.

Gisborne

Heavy RainHeavy Rain at Gisborne
Comments:

CommentPhenomenally heavy rains were reported in the Waiapu district.

FloodingFlooding
Comments:

CommentRivers were in heavy flood.

Heavy RainHeavy Rain at Ahikoura
Comments:

Physical CharacteristicAhikoura recorded 9 in (22.9 cm) of rain in the 16 hours to 9am on the 27th.

Heavy RainHeavy Rain at Gisborne City
Map Location: -38.656661 178.017356
Comments:

Physical CharacteristicGisborne recorded 2 in (5.1 cm) of rain in three days.

Heavy RainHeavy Rain at Ruatoria
Map Location: -37.890508 178.310264
Comments:

Physical CharacteristicRuatoria recorded 18 1/2 in (47.0 cm) of rain in the 3 days to 9am on the 29th. This was the heaviest rainfall since February 1917.

FloodingFlooding
Comments:

CommentThere were enormous floods in the rivers.

Heavy RainHeavy Rain at Tokomaru Bay
Map Location: -38.12831 178.319381
Comments:

Physical CharacteristicTokomaru Bay recorded 14 in (35.6 cm) of rain.

Heavy RainHeavy Rain at Waipiro Bay
Map Location: -38.020822 178.331346
Comments:

Physical CharacteristicPuketiti and Waipiro recorded 17 in (43.2 cm) of rain.

References

Cowie, C.A.; Attwood, A.K. (1957). Floods in New Zealand 1920-1953. The Soil Conservation Control Council, Wellington, New Zealand.
Headline: A great flood.
The New Zealand Herald, 29 March 1920.
Headline: Floods in Upper Wairoa.
The New Zealand Herald, 29 March 1920.
Headline: Record floods.
The Northern Advocate, 27 March 1920.
Headline: A heavy fall.
Northern Advocate, 29 March 1920.
Headline: Flood toll: Drowning disasters.
The Northern Advocate, 29 March 1920.
Headline: Kiripaka fares badly.
The Northern Advocate, 29 March 1920.
Headline: Northern Wairoa.
The Northern Advocate, 29 March 1920.
Headline: Tuesday, March 30, 1920.
The Northern Advocate, 30 March 1920.
Headline: Rough weather on the East Coast.
The Northland Age, 1 April 1920.