NZ Historic Weather Events Catalogue

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SevereJune 1947 Wellington and Manawatu-Wanganui Flooding ( 1947-06-27 )

50-100 years

There was extensive flooding in the Wairarapa which resulted in heavy stock losses and one casualty.

North Island

Multi HazardMulti Hazard at North Island
Duration:   3  days - There was heavy rain and flooding from the 27th to the 29th of June 1947.
Comments:

CommentA long period of strong, cyclonic southerlies affected central New Zealand.

Taranaki

Multi HazardMulti Hazard at Taranaki
Comments:

DamageExtensive damage was done in, particularly in South Taranaki, on the 28th by a south-east gale which was accompanied by heavy rain and snow.

High Wind GustsHigh Wind / Gust
Comments:

Peak Wind SpeedWindspeeds reached velocities of 82 mph (132 km/hr).

Affected LifelinePower lines were brought down and telephone communications were disrupted in many parts of the province.

Snow / IceSnow / Ice at Mount Taranaki
Map Location: -39.295865 174.063806
Comments:

ImpactThe heaviest snowstorm for six years was experienced on Mount Taranaki. Cars were marooned.

Manawatu-Wanganui

Multi HazardMulti Hazard at Manawatu-Wanganui
Comments:

ImpactHeavy rains on the 27th, accompanied by a strong southerly wind, caused minor flooding and serious damage was reported from some areas of Wanganui. Heavy rain in southern Hawke's Bay brought the Manawatu River into flood.

Damage CostThe damage to Wanganui county roads amounted to £4971 ($363,300 2010 dollars).

Damage CostThe damage to Rangitikei county roads amounted to £8000 ($584,700 2010 dollars).

FloodingFlooding
Comments:

Stock DamageStock losses were negligible in spite of the large areas inundated.

LandslideLandslide
Comments:

Affected LifelineSlips blocked inland roads. Slips occurred in the area between Mangamahy and Fields Track. There were slips on the Akatarawa Gorge Road and Haywards Road. There were slips in the Parihauhau district.

Snow / IceSnow / Ice
Comments:

Affected LifelineThere were heavy falls of snow on the Desert Road on the 28th.

FloodingFlooding at Manawatu Gorge
Map Location: -40.31792 175.798027
Comments:

Affected LifelineTwo chains (40 m) of the Manawatu Gorge highway subsided.

FloodingFlooding at Manawatu River
Map Location: -40.31344 175.74075
Comments:

Peak River LevelManawatu River had a peak level of 17 ft 3 in (5.26 m) on the Fitzherbert Bridge gauge.

Peak DischargeManawatu River had a peak discharge of 93,000 cusecs (2633 cumecs) at Fitzherbert Bridge.

Peak River FlowThe velocity of the river was 16 ft per second (4.88 m/s) at the Fitzherbert Bridge.

Peak River LevelManawatu River reached a level of 32 ft (9.75 m) at the Balance Bridge at midnight of the 28th.

ImpactThe river overflowed its banks at Rangitane and flooded the Taonui Basin. Several houses were surrounded by water and the occupants were evacuated.

FloodingFlooding at Pipiriki
Map Location: -39.480016 175.04686
Comments:

Affected LifelineThe highway to Pipiriki was closed due to flooding of the Whanganui River.

CommentWhanganui River rose above the Pipiriki wharf.

FloodingFlooding at Rangitikei River
Map Location: -39.758799 175.850983
Comments:

Peak River LevelRangitikei River reached a peak level of 8 ft 3 in (2.51 m) on the Kakariki Railway Bridge gauge, but no damage occurred.

FloodingFlooding at Shannon
Map Location: -40.54778 175.41487
Comments:

ImpactA serious break occurred in the banks of Mangaore Stream, below Shannon, where 1200 acres (486 ha) of the low-lying Buckley area were flooded. By 4am on the 29th the break was 50 ft (15.2 m) wide and 10 ft (3.05 m) deep and water still poured into the Buckley area.

Affected LifelineRailway services between Palmerston North and Wellington were dislocated due to the flooding of Mangaore Stream at Buckley.

Heavy RainHeavy Rain at Wanganui
Map Location: -39.932232 175.028352
Comments:

Physical CharacteristicWanganui recorded 1.25 in (3.18 cm) of rain in 24 hours.

FloodingFlooding at Whanganui River
Map Location: -39.845139 175.319738
Comments:

CommentWhanganui River was at a high level.

Wellington

Multi HazardMulti Hazard at Wellington
Comments:

CommentA week of southerly weather resulted in the worst flood since 1897. Heavy rain commenced in most districts in the Wairarapa at 6am on the 27th and continued til midday on the 28th.

Heavy RainHeavy Rain
Comments:

CommentThe rainfall in southern Wairarapa had an average recurrance interval that exceeded 100 years. Rainfalls were oficially reported as being up to 5 in (12.7 cm) in 24 hours and placed by some estimates as high as 10 in (25.4 cm) in a day.

FloodingFlooding
Comments:

CommentMost of the shorter rivers of the Wairarapa were in flood by midnight on the 27th.

Stock DamageStock losses included 9000 sheep and 300 cattle.

AreaThe total area flooded in the Wairarapa was 60,000 acres (24,281 ha). Much of this area remained flooded for several days.

ImpactStop banks in the Pukio Basin, Kahautara, Pihautea and Pirinoa area, which were built to allow for two or three feet clearance above the previous worst flood, were swept away like sand castles. Paddocks were rapidly submerged. People had to leave their homes after water rose to the door knobs.

Affected LifelineTakarau gorge road between Makara and Ohariu was blocked by a number of slips and washouts.

ImpactWind driven seas and banks of sand obstructing the outlet of Lake Onoke, between Lake Wairarapa and the sea, was the major cause of the widespread flooding in the Wairarapa.

Affected LifelineIn the middle of the storm and flood on the 28th every major and minor road was blocked in the Wairarapa. A serious instance was between Greytown and Carterton where the Waiotuna River rose over the road for several hundred yards. The next day all major roads and most minor roads were open.

Maritime / CoastalMaritime / Coastal
Comments:

DamageThe 555-ton coastal vessel Holmlea was damaged by huge rollers on the 29th and had to shelter in the open sea to the south of Cook Strait.

FloodingFlooding at Carterton
Map Location: -41.024015 175.535635
Comments:

Physical CharacteristicCarterton recorded about 4 in (10.16 cm) of rain in 24 hours.

FloodingFlooding at Featherston
Map Location: -41.112376 175.327906
Comments:

ImpactA car was washed away by the force of current on the Featherston-Martinborough road.

FloodingFlooding at Gladstone
Map Location: -41.085988 175.644559
Comments:

CasualtiesA man, aged 22, was drowned at Gladstone as he tried to ride a horse across the Ruamahanga River.

FloodingFlooding at Greytown
Map Location: -41.079997 175.466942
Comments:

Physical CharacteristicGreytown recorded 4.18 in (10.62 cm) of rain in 24 hours (which has a return period of 20 years).

Multi HazardMulti Hazard at Hutt Valley
Map Location: -41.162848 174.974804
Comments:

Affected LifelineThere was damage due to heavy rain in Hutt Valley, where four main roads were blocked by slips. Other roads throughout the Hutt Valley suffered surface flooding.

FloodingFlooding at Lake Onoke
Map Location: -41.38056 175.129
Comments:

Peak Water LevelAn overflow which occurred near Tuhitarata and the extreme flooding of local streams raised the level of Lake Onoke to 8 ft (2.44 m).

FloodingFlooding at Lake Wairarapa
Map Location: -41.207855 175.248076
Comments:

Physical CharacteristicLake Wairarapa rose about 10 ft (3.05 m) above normal.

AreaThe lake waters were spread over an area of 150 square miles (388 km^2) and began receding slowly on the 31st of June.

FloodingFlooding at Lower Hutt
Map Location: -41.216677 174.934068
Comments:

ImpactParts of the Lower Hutt were flooded around the Waiwhetu Stream.

ImpactPetone suffered minor flooding.

Heavy RainHeavy Rain at Martinborough
Map Location: -41.2171 175.436864
Comments:

Physical CharacteristicMartinborough recorded 7.18 in (18.24 cm) of rain in 24 hours (which has a return period of over 150 years).

FloodingFlooding
Comments:

Physical CharacteristicRuamahanga River had an estimated discharge of 69,000 cusecs (1954 cumecs) at Martinborough Bridge from a catchment area of 990 sq miles (2564 km^2).

ImpactA number of houses were flooded in Martinborough. The area south of Martinborough and on the east bank of the Ruamahunga River suffered very severely and many houses were partly submerged or surrounded by the flood.

Heavy RainHeavy Rain at Masterton
Map Location: -40.964296 175.667649
Comments:

Physical CharacteristicMasterton recorded 5.06 in (12.85 cm) of rain in 24 hours (which has a return period of 50 years).

FloodingFlooding
Comments:

ImpactThe town creeks in Masterton overflowed their banks and water flooded shops.

Physical Characteristic10,000 acres (4047 ha) were flooded when the Ruamahanga River burst the stopbanks in Moiki and poured into the Pukio Basin. The flood waters were 10 feet (3.05 m) deep in some places.

LandslideLandslide
Comments:

Affected LifelineNorth of Masterton, near Opaki, the railway line to Woodville was cut by a great slip 2.5 chains (50 m) wide. The same slip broke the telegraph and telephone lines north from Masterton.

FloodingFlooding at Orongorongo
Map Location: -41.41613 174.90941
Comments:

Physical CharacteristicOrongorongo River had a discharge of 4020 cusecs (114 cumecs) at the water supply intake weir from a catchment area of 14 sq miles (36 km^2).

FloodingFlooding at Pahaoa River
Comments:

Physical CharacteristicPahaoa River rose 40 ft (12.19 m) above normal.

High Wind GustsHigh Wind / Gust at Paraparaumu
Map Location: -40.912244 174.986353
Comments:

Affected LifelineAircrafts were grounded in Paraparaumu for two days due to boisterous conditions.

FloodingFlooding at Pirinoa
Map Location: -41.351508 175.20158
Comments:

ImpactEight men and four woman were marooned in the Kumanga area (3 miles north of Pirinoa) when they became surrounded by a vast sheet of water.

FloodingFlooding at Plimmerton
Map Location: -41.079253 174.855658
Comments:

Affected LifelinePlimmerton was cut off from road and rail traffic.

FloodingFlooding at Porirua
Map Location: -41.141089 174.818671
Comments:

Physical CharacteristicPorirua Stream had a discharge of 2100 cusecs (59 cumecs) at Huamai Street Bridge from a catchment area of 15.5 sq miles (40 km^2).

ImpactA small stream running through Glenside through Tawa Flat to Porirua harbour flooded and put a large area of Porirua under water. Water lay on the main street isolating businesses and residences. The railway tracks were also flooded.

FloodingFlooding at Pukio
Map Location: -41.249354 175.360336
Comments:

Physical CharacteristicWater levels in the Pukio Basin were 1-2 ft (0.30-0.61 m) higher than those which were recorded during the 1932 flood

AreaAbout 20,000 to 30,000 acres (8094-12,141 ha) were submerged in the Pukio Basin and Kahautara area. The area became a vast extension of Lake Wairarapa.

FloodingFlooding at Ruamahanga River
Map Location: -41.102055 175.509442
Comments:

ImpactThe Kahautara-Pukio stopbank of the Ruamahanga River was breached at 11.30am on the 28th.

Physical CharacteristicThe total volume of the flood in the Ruamahanga was 210,400 acre-feet.

Physical CharacteristicRuamahanga River rose as much as 15 ft (4.57 m) above its normal level.

Heavy RainHeavy Rain at Shooting Box
Comments:

Physical CharacteristicShooting Box recorded 182 mm (18.2 cm) of rain in 24 hours.

FloodingFlooding at Tauherenikau River
Map Location: -41.03835 175.29109
Comments:

ImpactTauherenikau River burst its banks.

FloodingFlooding at Tauweru River
Map Location: -41.00899 175.74048
Comments:

CommentTauweru River was the main contributor to the flood in the Wairarapa.

Heavy RainHeavy Rain at Wainuiomata
Map Location: -41.258208 174.954979
Comments:

Physical CharacteristicWainuiomata recorded 10.28 in (26.11 cm) of rain in 24 hours.

FloodingFlooding at Wainuiomata River
Map Location: -41.27392 174.97673
Comments:

Physical CharacteristicWainuiomata River had a discharge of 3425 cusecs (97 cumecs) at Morton Dam from a catchment area of 10.75 sq miles (28 km^2).

Multi HazardMulti Hazard at Wellington City
Map Location: -41.28855 174.776764
Comments:

CauseA vigorous depression to the east of Cook Strait was responsible for the weather. The air circulating around the centre of the low pressure area struck the mountains at the north of the South Island and swung in a southerly gale through the strait into Wellington.

Heavy RainHeavy Rain
Comments:

Physical CharacteristicWellington recorded 2 in (5.08 cm) of rain in 12 hours ending at 9pm on the 27th.

FloodingFlooding
Comments:

ImpactThere were few houses in Wellington that were not leaking.

ImpactMinor flooding occurred all over parts of Wellington, Petone, the Hutt and Upper Hutt.

Affected LifelineTrains on the Main trunk line between Wellington and Paekakariki were delayed as the result of damaged electrical equipment.

Affected LifelineThe Hutt Road was partly blocked on the 27th by flood water which poured down from the hills between Kaiwarra and Ngahauranga.

LandslideLandslide
Comments:

Affected LifelineSlips on the Johnsonville line between Wadestown and Ngaio interrupted rail services.

Maritime / CoastalMaritime / Coastal
Comments:

Affected LifelineThe gale in Wellington Harbour and the mountainous seas on Cook Strait brought shipping to a standstill.

Affected LifelineA high tide at noon on the 27th was backed up by the southerly gale and high seas smashed against the waterfront road. Scouring from the sea undermined a railway track running from Wellington to the Hutt Valley. The seawall at Eastborne and the Bays was breached in several places.

High Wind GustsHigh Wind / Gust
Comments:

CommentThe most severe gale in the history of Wellington raged on the 27th of June.

Affected LifelineIn Karori the telephone service was cut off by falling trees.

Peak Wind SpeedKelburn recorded wind gusts of up to 76 mph (122 km/hr) on the 27th.

Peak Wind SpeedRongotai aerodome was unservicable all day due to wind gusts of up to 96 mph (154 km/hr) at about 2:45pm on the 27th. The average wind speed was 68 mph (109 km/hr) during this time.

InjuriesA woman was received an injury after she was blown over on a slippery path by the wind.

FloodingFlooding at Whareama
Map Location: -40.957604 176.03415
Comments:

CommentRainfall was not as heavy in the Whareama catchment. Local flooding was very high but the main river did not reach an extremely high level. Other southern rivers however were extremely high.

FloodingFlooding at Whitimanuka
Comments:

Physical CharacteristicWater levels in Whitimanuka were 1 ft (0.3 m) higher than those which were recorded during the 1932 flood.

References

Cowie, C.A; Attwood, A.K.(1957) FLOODS in NEW ZEALAND 1920 -53, The Soil Conservation and Rivers Control Council, Wellington, New Zealand 239p.
Hydrology Annual No.3 1955, Soil Conservation and River Control Council, Wellington, New Zealand
NZ Met Service. (2008). Meteorology of Extreme Rainfalls in New Zealand (Mark Pascoe, Ed.).
Saunders, W.(2000) Planning and Resources, Hazard and Emergency Management Section, WAIRARAPA DIVISION, Wairarapa Storm Events 1880 - 1998, Technical Report No. 00/17
Headline: Heavy Stock Losses.
The Evening Post, June 30 1947.
Headline:Flood Havoc, South Wairarapa, Water Receding.
The New Zealand Herald, 1 July (Tuesday) 1947.
Headline:Food by Air, Marooned Settlers, Twelve on Small Island.
The New Zealand Herald, 1 July (Tuesday) 1947.
Headline: Record Gale, Wellington Storm, 96 Miles an Hour.
The New Zealand Herald, 28 June (Saturday) 1947.
Headline: Anxious Watch, Manawatu Suffers, River's High Level.
The New Zealand Herald, 30 June (Monday) 1947.
Headline: FLOOD CAUSES CHAOS, Wairarapa's Plight, Large Areas Under Water.
The New Zealand Herald, 30 June (Monday) 1947.
Headline: Taranaki Swept, Heavy Snow on Egmont, Some Motorists Marooned.
The New Zealand Herald, 30 June (Monday) 1947.
Headline: Strong gale and heavy rain, the Wanganui district.
The Wanganui Chronicle, 28 June 1947.

SevereJune 1947 Wellington and Manawatu-Wanganui Flooding ( 1947-06-27 )

50-100 years

There was extensive flooding in the Wairarapa which resulted in heavy stock losses and one casualty.

North Island

Multi HazardMulti Hazard at North Island
Duration:   3  days - There was heavy rain and flooding from the 27th to the 29th of June 1947.
Comments:

CommentA long period of strong, cyclonic southerlies affected central New Zealand.

Taranaki

Multi HazardMulti Hazard at Taranaki
Comments:

DamageExtensive damage was done in, particularly in South Taranaki, on the 28th by a south-east gale which was accompanied by heavy rain and snow.

High Wind GustsHigh Wind / Gust
Comments:

Peak Wind SpeedWindspeeds reached velocities of 82 mph (132 km/hr).

Affected LifelinePower lines were brought down and telephone communications were disrupted in many parts of the province.

Snow / IceSnow / Ice at Mount Taranaki
Map Location: -39.295865 174.063806
Comments:

ImpactThe heaviest snowstorm for six years was experienced on Mount Taranaki. Cars were marooned.

Manawatu-Wanganui

Multi HazardMulti Hazard at Manawatu-Wanganui
Comments:

ImpactHeavy rains on the 27th, accompanied by a strong southerly wind, caused minor flooding and serious damage was reported from some areas of Wanganui. Heavy rain in southern Hawke's Bay brought the Manawatu River into flood.

Damage CostThe damage to Wanganui county roads amounted to £4971 ($363,300 2010 dollars).

Damage CostThe damage to Rangitikei county roads amounted to £8000 ($584,700 2010 dollars).

FloodingFlooding
Comments:

Stock DamageStock losses were negligible in spite of the large areas inundated.

LandslideLandslide
Comments:

Affected LifelineSlips blocked inland roads. Slips occurred in the area between Mangamahy and Fields Track. There were slips on the Akatarawa Gorge Road and Haywards Road. There were slips in the Parihauhau district.

Snow / IceSnow / Ice
Comments:

Affected LifelineThere were heavy falls of snow on the Desert Road on the 28th.

FloodingFlooding at Manawatu Gorge
Map Location: -40.31792 175.798027
Comments:

Affected LifelineTwo chains (40 m) of the Manawatu Gorge highway subsided.

FloodingFlooding at Manawatu River
Map Location: -40.31344 175.74075
Comments:

Peak River LevelManawatu River had a peak level of 17 ft 3 in (5.26 m) on the Fitzherbert Bridge gauge.

Peak DischargeManawatu River had a peak discharge of 93,000 cusecs (2633 cumecs) at Fitzherbert Bridge.

Peak River FlowThe velocity of the river was 16 ft per second (4.88 m/s) at the Fitzherbert Bridge.

Peak River LevelManawatu River reached a level of 32 ft (9.75 m) at the Balance Bridge at midnight of the 28th.

ImpactThe river overflowed its banks at Rangitane and flooded the Taonui Basin. Several houses were surrounded by water and the occupants were evacuated.

FloodingFlooding at Pipiriki
Map Location: -39.480016 175.04686
Comments:

Affected LifelineThe highway to Pipiriki was closed due to flooding of the Whanganui River.

CommentWhanganui River rose above the Pipiriki wharf.

FloodingFlooding at Rangitikei River
Map Location: -39.758799 175.850983
Comments:

Peak River LevelRangitikei River reached a peak level of 8 ft 3 in (2.51 m) on the Kakariki Railway Bridge gauge, but no damage occurred.

FloodingFlooding at Shannon
Map Location: -40.54778 175.41487
Comments:

ImpactA serious break occurred in the banks of Mangaore Stream, below Shannon, where 1200 acres (486 ha) of the low-lying Buckley area were flooded. By 4am on the 29th the break was 50 ft (15.2 m) wide and 10 ft (3.05 m) deep and water still poured into the Buckley area.

Affected LifelineRailway services between Palmerston North and Wellington were dislocated due to the flooding of Mangaore Stream at Buckley.

Heavy RainHeavy Rain at Wanganui
Map Location: -39.932232 175.028352
Comments:

Physical CharacteristicWanganui recorded 1.25 in (3.18 cm) of rain in 24 hours.

FloodingFlooding at Whanganui River
Map Location: -39.845139 175.319738
Comments:

CommentWhanganui River was at a high level.

Wellington

Multi HazardMulti Hazard at Wellington
Comments:

CommentA week of southerly weather resulted in the worst flood since 1897. Heavy rain commenced in most districts in the Wairarapa at 6am on the 27th and continued til midday on the 28th.

Heavy RainHeavy Rain
Comments:

CommentThe rainfall in southern Wairarapa had an average recurrance interval that exceeded 100 years. Rainfalls were oficially reported as being up to 5 in (12.7 cm) in 24 hours and placed by some estimates as high as 10 in (25.4 cm) in a day.

FloodingFlooding
Comments:

CommentMost of the shorter rivers of the Wairarapa were in flood by midnight on the 27th.

Stock DamageStock losses included 9000 sheep and 300 cattle.

AreaThe total area flooded in the Wairarapa was 60,000 acres (24,281 ha). Much of this area remained flooded for several days.

ImpactStop banks in the Pukio Basin, Kahautara, Pihautea and Pirinoa area, which were built to allow for two or three feet clearance above the previous worst flood, were swept away like sand castles. Paddocks were rapidly submerged. People had to leave their homes after water rose to the door knobs.

Affected LifelineTakarau gorge road between Makara and Ohariu was blocked by a number of slips and washouts.

ImpactWind driven seas and banks of sand obstructing the outlet of Lake Onoke, between Lake Wairarapa and the sea, was the major cause of the widespread flooding in the Wairarapa.

Affected LifelineIn the middle of the storm and flood on the 28th every major and minor road was blocked in the Wairarapa. A serious instance was between Greytown and Carterton where the Waiotuna River rose over the road for several hundred yards. The next day all major roads and most minor roads were open.

Maritime / CoastalMaritime / Coastal
Comments:

DamageThe 555-ton coastal vessel Holmlea was damaged by huge rollers on the 29th and had to shelter in the open sea to the south of Cook Strait.

FloodingFlooding at Carterton
Map Location: -41.024015 175.535635
Comments:

Physical CharacteristicCarterton recorded about 4 in (10.16 cm) of rain in 24 hours.

FloodingFlooding at Featherston
Map Location: -41.112376 175.327906
Comments:

ImpactA car was washed away by the force of current on the Featherston-Martinborough road.

FloodingFlooding at Gladstone
Map Location: -41.085988 175.644559
Comments:

CasualtiesA man, aged 22, was drowned at Gladstone as he tried to ride a horse across the Ruamahanga River.

FloodingFlooding at Greytown
Map Location: -41.079997 175.466942
Comments:

Physical CharacteristicGreytown recorded 4.18 in (10.62 cm) of rain in 24 hours (which has a return period of 20 years).

Multi HazardMulti Hazard at Hutt Valley
Map Location: -41.162848 174.974804
Comments:

Affected LifelineThere was damage due to heavy rain in Hutt Valley, where four main roads were blocked by slips. Other roads throughout the Hutt Valley suffered surface flooding.

FloodingFlooding at Lake Onoke
Map Location: -41.38056 175.129
Comments:

Peak Water LevelAn overflow which occurred near Tuhitarata and the extreme flooding of local streams raised the level of Lake Onoke to 8 ft (2.44 m).

FloodingFlooding at Lake Wairarapa
Map Location: -41.207855 175.248076
Comments:

Physical CharacteristicLake Wairarapa rose about 10 ft (3.05 m) above normal.

AreaThe lake waters were spread over an area of 150 square miles (388 km^2) and began receding slowly on the 31st of June.

FloodingFlooding at Lower Hutt
Map Location: -41.216677 174.934068
Comments:

ImpactParts of the Lower Hutt were flooded around the Waiwhetu Stream.

ImpactPetone suffered minor flooding.

Heavy RainHeavy Rain at Martinborough
Map Location: -41.2171 175.436864
Comments:

Physical CharacteristicMartinborough recorded 7.18 in (18.24 cm) of rain in 24 hours (which has a return period of over 150 years).

FloodingFlooding
Comments:

Physical CharacteristicRuamahanga River had an estimated discharge of 69,000 cusecs (1954 cumecs) at Martinborough Bridge from a catchment area of 990 sq miles (2564 km^2).

ImpactA number of houses were flooded in Martinborough. The area south of Martinborough and on the east bank of the Ruamahunga River suffered very severely and many houses were partly submerged or surrounded by the flood.

Heavy RainHeavy Rain at Masterton
Map Location: -40.964296 175.667649
Comments:

Physical CharacteristicMasterton recorded 5.06 in (12.85 cm) of rain in 24 hours (which has a return period of 50 years).

FloodingFlooding
Comments:

ImpactThe town creeks in Masterton overflowed their banks and water flooded shops.

Physical Characteristic10,000 acres (4047 ha) were flooded when the Ruamahanga River burst the stopbanks in Moiki and poured into the Pukio Basin. The flood waters were 10 feet (3.05 m) deep in some places.

LandslideLandslide
Comments:

Affected LifelineNorth of Masterton, near Opaki, the railway line to Woodville was cut by a great slip 2.5 chains (50 m) wide. The same slip broke the telegraph and telephone lines north from Masterton.

FloodingFlooding at Orongorongo
Map Location: -41.41613 174.90941
Comments:

Physical CharacteristicOrongorongo River had a discharge of 4020 cusecs (114 cumecs) at the water supply intake weir from a catchment area of 14 sq miles (36 km^2).

FloodingFlooding at Pahaoa River
Comments:

Physical CharacteristicPahaoa River rose 40 ft (12.19 m) above normal.

High Wind GustsHigh Wind / Gust at Paraparaumu
Map Location: -40.912244 174.986353
Comments:

Affected LifelineAircrafts were grounded in Paraparaumu for two days due to boisterous conditions.

FloodingFlooding at Pirinoa
Map Location: -41.351508 175.20158
Comments:

ImpactEight men and four woman were marooned in the Kumanga area (3 miles north of Pirinoa) when they became surrounded by a vast sheet of water.

FloodingFlooding at Plimmerton
Map Location: -41.079253 174.855658
Comments:

Affected LifelinePlimmerton was cut off from road and rail traffic.

FloodingFlooding at Porirua
Map Location: -41.141089 174.818671
Comments:

Physical CharacteristicPorirua Stream had a discharge of 2100 cusecs (59 cumecs) at Huamai Street Bridge from a catchment area of 15.5 sq miles (40 km^2).

ImpactA small stream running through Glenside through Tawa Flat to Porirua harbour flooded and put a large area of Porirua under water. Water lay on the main street isolating businesses and residences. The railway tracks were also flooded.

FloodingFlooding at Pukio
Map Location: -41.249354 175.360336
Comments:

Physical CharacteristicWater levels in the Pukio Basin were 1-2 ft (0.30-0.61 m) higher than those which were recorded during the 1932 flood

AreaAbout 20,000 to 30,000 acres (8094-12,141 ha) were submerged in the Pukio Basin and Kahautara area. The area became a vast extension of Lake Wairarapa.

FloodingFlooding at Ruamahanga River
Map Location: -41.102055 175.509442
Comments:

ImpactThe Kahautara-Pukio stopbank of the Ruamahanga River was breached at 11.30am on the 28th.

Physical CharacteristicThe total volume of the flood in the Ruamahanga was 210,400 acre-feet.

Physical CharacteristicRuamahanga River rose as much as 15 ft (4.57 m) above its normal level.

Heavy RainHeavy Rain at Shooting Box
Comments:

Physical CharacteristicShooting Box recorded 182 mm (18.2 cm) of rain in 24 hours.

FloodingFlooding at Tauherenikau River
Map Location: -41.03835 175.29109
Comments:

ImpactTauherenikau River burst its banks.

FloodingFlooding at Tauweru River
Map Location: -41.00899 175.74048
Comments:

CommentTauweru River was the main contributor to the flood in the Wairarapa.

Heavy RainHeavy Rain at Wainuiomata
Map Location: -41.258208 174.954979
Comments:

Physical CharacteristicWainuiomata recorded 10.28 in (26.11 cm) of rain in 24 hours.

FloodingFlooding at Wainuiomata River
Map Location: -41.27392 174.97673
Comments:

Physical CharacteristicWainuiomata River had a discharge of 3425 cusecs (97 cumecs) at Morton Dam from a catchment area of 10.75 sq miles (28 km^2).

Multi HazardMulti Hazard at Wellington City
Map Location: -41.28855 174.776764
Comments:

CauseA vigorous depression to the east of Cook Strait was responsible for the weather. The air circulating around the centre of the low pressure area struck the mountains at the north of the South Island and swung in a southerly gale through the strait into Wellington.

Heavy RainHeavy Rain
Comments:

Physical CharacteristicWellington recorded 2 in (5.08 cm) of rain in 12 hours ending at 9pm on the 27th.

FloodingFlooding
Comments:

ImpactThere were few houses in Wellington that were not leaking.

ImpactMinor flooding occurred all over parts of Wellington, Petone, the Hutt and Upper Hutt.

Affected LifelineTrains on the Main trunk line between Wellington and Paekakariki were delayed as the result of damaged electrical equipment.

Affected LifelineThe Hutt Road was partly blocked on the 27th by flood water which poured down from the hills between Kaiwarra and Ngahauranga.

LandslideLandslide
Comments:

Affected LifelineSlips on the Johnsonville line between Wadestown and Ngaio interrupted rail services.

Maritime / CoastalMaritime / Coastal
Comments:

Affected LifelineThe gale in Wellington Harbour and the mountainous seas on Cook Strait brought shipping to a standstill.

Affected LifelineA high tide at noon on the 27th was backed up by the southerly gale and high seas smashed against the waterfront road. Scouring from the sea undermined a railway track running from Wellington to the Hutt Valley. The seawall at Eastborne and the Bays was breached in several places.

High Wind GustsHigh Wind / Gust
Comments:

CommentThe most severe gale in the history of Wellington raged on the 27th of June.

Affected LifelineIn Karori the telephone service was cut off by falling trees.

Peak Wind SpeedKelburn recorded wind gusts of up to 76 mph (122 km/hr) on the 27th.

Peak Wind SpeedRongotai aerodome was unservicable all day due to wind gusts of up to 96 mph (154 km/hr) at about 2:45pm on the 27th. The average wind speed was 68 mph (109 km/hr) during this time.

InjuriesA woman was received an injury after she was blown over on a slippery path by the wind.

FloodingFlooding at Whareama
Map Location: -40.957604 176.03415
Comments:

CommentRainfall was not as heavy in the Whareama catchment. Local flooding was very high but the main river did not reach an extremely high level. Other southern rivers however were extremely high.

FloodingFlooding at Whitimanuka
Comments:

Physical CharacteristicWater levels in Whitimanuka were 1 ft (0.3 m) higher than those which were recorded during the 1932 flood.

References

Cowie, C.A; Attwood, A.K.(1957) FLOODS in NEW ZEALAND 1920 -53, The Soil Conservation and Rivers Control Council, Wellington, New Zealand 239p.
Hydrology Annual No.3 1955, Soil Conservation and River Control Council, Wellington, New Zealand
NZ Met Service. (2008). Meteorology of Extreme Rainfalls in New Zealand (Mark Pascoe, Ed.).
Saunders, W.(2000) Planning and Resources, Hazard and Emergency Management Section, WAIRARAPA DIVISION, Wairarapa Storm Events 1880 - 1998, Technical Report No. 00/17
Headline: Heavy Stock Losses.
The Evening Post, June 30 1947.
Headline:Flood Havoc, South Wairarapa, Water Receding.
The New Zealand Herald, 1 July (Tuesday) 1947.
Headline:Food by Air, Marooned Settlers, Twelve on Small Island.
The New Zealand Herald, 1 July (Tuesday) 1947.
Headline: Record Gale, Wellington Storm, 96 Miles an Hour.
The New Zealand Herald, 28 June (Saturday) 1947.
Headline: Anxious Watch, Manawatu Suffers, River's High Level.
The New Zealand Herald, 30 June (Monday) 1947.
Headline: FLOOD CAUSES CHAOS, Wairarapa's Plight, Large Areas Under Water.
The New Zealand Herald, 30 June (Monday) 1947.
Headline: Taranaki Swept, Heavy Snow on Egmont, Some Motorists Marooned.
The New Zealand Herald, 30 June (Monday) 1947.
Headline: Strong gale and heavy rain, the Wanganui district.
The Wanganui Chronicle, 28 June 1947.