NZ Historic Weather Events Catalogue

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ModerateOctober 1946 Lower South Island Flooding ( 1946-10-16 )

27 years

Heavy rain and sudden thaw of snow caused flooding in Otago and Southland

Otago

Heavy RainHeavy Rain at Central Otago
Comments:

CommentSudden thaw of late snow on ranges in Central Otago was caused by warm northerly winds and heavy rain in the Lakes district

FloodingFlooding
Comments:

CommentCreeks rose swiftly in the area and were in full flood

Affected LifelineOutlying roads were covered by water from creeks in some parts, particularly at Glendhu and Cardrona

Affected LifelineThe Queensberry-Wanaka road rendered impassable and creeks were over the road between Lowburn and Queensbury

FloodingFlooding at Clutha River
Map Location: -46.203535 169.699318
Comments:

CommentSharp rise occurred in the level of Clutha River

Peak River LevelClutha River was in high flood on the night of the 16th October 1946 as it swept past Roxburgh, estimated that it had risen ~9 ft (2.74m) at that point

FloodingFlooding at Kawarau River
Map Location: -45.01694 168.96454
Comments:

CommentSharp rise occurred in the level of Kawarau River

FloodingFlooding at Fraser River
Map Location: -45.24979 169.19073
Comments:

ImpactLow-lying orchards and farms were inundated in Earnscleugh settlement by flood waters from Fraser River

CommentFraser River reached its highest level for many years to overflow its banks and cause flooding over a wide area

Heavy RainHeavy Rain at Wanaka
Map Location: -44.638329 169.076955
Comments:

Peak RainfallNearly 3 in (7.62cm) fell in Wanaka over the night of 15/10/1946

FloodingFlooding
Comments:

Affected LifelineIt covered main road from Cromwell to Wanaka with 3 ft (91cm) of water

Peak Water LevelLake Wanaka rose ~4 ft (1.22m) with the combined effects of snow thaw and heavy rain

Heavy RainHeavy Rain at Queenstown
Map Location: -45.041441 168.645105
Comments:

Peak RainfallRainfall in Queenstown reached 2 in (5.08cm)

FloodingFlooding
Comments:

CommentRain at Queenstown caused the lake to rise

FloodingFlooding at Luggate Creek
Map Location: -44.78928 169.1586
Comments:

CommentLuggate Creek swelled to its greatest proportions for 25 yrs

FloodingFlooding at Earnscleugh
Map Location: -45.215932 169.31466
Comments:

CommentAt peak of the flood at Earnscleugh, residents said it was the biggest since 1919

Affected LifelineSome roads damaged by washouts in Earnscleugh district

FloodingFlooding at Lindis River
Map Location: -44.76969 169.50764
Comments:

CommentLindis River was in full flood

FloodingFlooding at Lindis Pass
Map Location: -44.5826 169.63844
Comments:

Affected LifelineLindis Pass was blocked to traffic and washouts occurred on gorge road and water was flowing over bridge near the post office

FloodingFlooding at Cromwell
Map Location: -45.040741 169.203073
Comments:

Peak Water LevelAt Cromwell both Kawarau and Clutha Rivers showed a rise of 8 ft (2.44m)

CommentBoth Clutha and Kawarau Rivers were very discoloured and carrying a large amount of and and still rising on the night of the 16/10/1946 as heavy rain fell in Cromwell area throughout that day

FloodingFlooding at Alexandra
Map Location: -45.253862 169.375391
Comments:

Peak Water LevelAt Alexandra the Clutha River had risen from 5 ft (1.5m) on 14/10/1946 to 20 ft (6.1m) on the afternoon of 16/10/1946 and continued to rise

Peak River LevelRecord level of Clutha River at Alexandra of 26 ft 11 in (8.2m) during 1946 flood

FloodingFlooding at Manuherikia River
Map Location: -45.150057 169.531395
Comments:

CommentManuherikia River had risen substantially

LightningLightning at Makarora
Map Location: -44.23631 169.233253
Comments:

CommentThe heaviest thunderstorm in years occurred at Makarora on 16/10/1946 following heavy rain

FloodingFlooding at Pomahaka River
Map Location: -46.12205 169.43334
Comments:

Peak River LevelPomahaka River did not rise appreciably - rose to 68.5 ft (21m) at the bridge on 16th night, 5 ft (1.5m) below danger level

FloodingFlooding at Waitaki
Map Location: -44.68553 170.42406
Comments:

Peak Water LevelRecord height of water coming over Waitaki hydro-electric dam of 5 ft 8 in (1.7m) during 1946 flood

Southland

FloodingFlooding at Southland
Comments:

CommentFlooding occurred in various parts of Southland as a result of steady rain during past 2 days

CommentHeavier falls than Invercargill one reported from the country

CommentRivers, streams and creeks high

Affected LifelineIn some places highways flooded

FloodingFlooding at Mataura
Map Location: -46.18797 168.855413
Comments:

Peak DischargeAnnual maximum flood discharge from Mataura River recorded during this flood at 340 cumecs

Heavy RainHeavy Rain at Invercargill
Map Location: -46.436318 168.35975
Comments:

Peak Rainfall2 in (5cm) of rainfall in Invercargill over 24 hours

FloodingFlooding at Otautau
Map Location: -46.143853 168.005563
Comments:

CommentMost serious flooding appears to have occurred at Otautau

EvacueesMore than 20 houses evacuated

ImpactFloodwaters from Aparima River poured in to a depth of several inches in houses

CommentThe banks along Otautau Stream saved main part of town from flooding

CommentOlder residents said present flood was not as serious as that of 1913

FloodingFlooding at Ohau
Comments:

ImpactWater from a flooded creek at Ohau poured into the opencast mine on 16/10/1946. At the peak of the flood there was ~18 ft (5.5m) of water in the mine, quantity est. as ~20,000,000 gallons and the mine expected to be clear in 5 or 6 days

References

Headline: Central Otago Floods.
Otago Daily Times, 17 October 1946.
Headline: Precautions Taken.
Otago Daily Times, 17 October 1946.
Headline: Rain in Southland, Flooding at Otautau.
Otago Daily Times, 17 October 1946.
Headline: Rivers Rise Sharply.
Otago Daily Times, 17 October 1946.
Headline: Flooding in Waitaki Area.
Otago Daily Times, 4 November 1948.
Headline: Record Level at Alexandra.
Otago Daily Times, 4 November 1948.
Surface Water Hydrology of the Mataura River Catchment.

ModerateOctober 1946 Lower South Island Flooding ( 1946-10-16 )

27 years

Heavy rain and sudden thaw of snow caused flooding in Otago and Southland

Otago

Heavy RainHeavy Rain at Central Otago
Comments:

CommentSudden thaw of late snow on ranges in Central Otago was caused by warm northerly winds and heavy rain in the Lakes district

FloodingFlooding
Comments:

CommentCreeks rose swiftly in the area and were in full flood

Affected LifelineOutlying roads were covered by water from creeks in some parts, particularly at Glendhu and Cardrona

Affected LifelineThe Queensberry-Wanaka road rendered impassable and creeks were over the road between Lowburn and Queensbury

FloodingFlooding at Clutha River
Map Location: -46.203535 169.699318
Comments:

CommentSharp rise occurred in the level of Clutha River

Peak River LevelClutha River was in high flood on the night of the 16th October 1946 as it swept past Roxburgh, estimated that it had risen ~9 ft (2.74m) at that point

FloodingFlooding at Kawarau River
Map Location: -45.01694 168.96454
Comments:

CommentSharp rise occurred in the level of Kawarau River

FloodingFlooding at Fraser River
Map Location: -45.24979 169.19073
Comments:

ImpactLow-lying orchards and farms were inundated in Earnscleugh settlement by flood waters from Fraser River

CommentFraser River reached its highest level for many years to overflow its banks and cause flooding over a wide area

Heavy RainHeavy Rain at Wanaka
Map Location: -44.638329 169.076955
Comments:

Peak RainfallNearly 3 in (7.62cm) fell in Wanaka over the night of 15/10/1946

FloodingFlooding
Comments:

Affected LifelineIt covered main road from Cromwell to Wanaka with 3 ft (91cm) of water

Peak Water LevelLake Wanaka rose ~4 ft (1.22m) with the combined effects of snow thaw and heavy rain

Heavy RainHeavy Rain at Queenstown
Map Location: -45.041441 168.645105
Comments:

Peak RainfallRainfall in Queenstown reached 2 in (5.08cm)

FloodingFlooding
Comments:

CommentRain at Queenstown caused the lake to rise

FloodingFlooding at Luggate Creek
Map Location: -44.78928 169.1586
Comments:

CommentLuggate Creek swelled to its greatest proportions for 25 yrs

FloodingFlooding at Earnscleugh
Map Location: -45.215932 169.31466
Comments:

CommentAt peak of the flood at Earnscleugh, residents said it was the biggest since 1919

Affected LifelineSome roads damaged by washouts in Earnscleugh district

FloodingFlooding at Lindis River
Map Location: -44.76969 169.50764
Comments:

CommentLindis River was in full flood

FloodingFlooding at Lindis Pass
Map Location: -44.5826 169.63844
Comments:

Affected LifelineLindis Pass was blocked to traffic and washouts occurred on gorge road and water was flowing over bridge near the post office

FloodingFlooding at Cromwell
Map Location: -45.040741 169.203073
Comments:

Peak Water LevelAt Cromwell both Kawarau and Clutha Rivers showed a rise of 8 ft (2.44m)

CommentBoth Clutha and Kawarau Rivers were very discoloured and carrying a large amount of and and still rising on the night of the 16/10/1946 as heavy rain fell in Cromwell area throughout that day

FloodingFlooding at Alexandra
Map Location: -45.253862 169.375391
Comments:

Peak Water LevelAt Alexandra the Clutha River had risen from 5 ft (1.5m) on 14/10/1946 to 20 ft (6.1m) on the afternoon of 16/10/1946 and continued to rise

Peak River LevelRecord level of Clutha River at Alexandra of 26 ft 11 in (8.2m) during 1946 flood

FloodingFlooding at Manuherikia River
Map Location: -45.150057 169.531395
Comments:

CommentManuherikia River had risen substantially

LightningLightning at Makarora
Map Location: -44.23631 169.233253
Comments:

CommentThe heaviest thunderstorm in years occurred at Makarora on 16/10/1946 following heavy rain

FloodingFlooding at Pomahaka River
Map Location: -46.12205 169.43334
Comments:

Peak River LevelPomahaka River did not rise appreciably - rose to 68.5 ft (21m) at the bridge on 16th night, 5 ft (1.5m) below danger level

FloodingFlooding at Waitaki
Map Location: -44.68553 170.42406
Comments:

Peak Water LevelRecord height of water coming over Waitaki hydro-electric dam of 5 ft 8 in (1.7m) during 1946 flood

Southland

FloodingFlooding at Southland
Comments:

CommentFlooding occurred in various parts of Southland as a result of steady rain during past 2 days

CommentHeavier falls than Invercargill one reported from the country

CommentRivers, streams and creeks high

Affected LifelineIn some places highways flooded

FloodingFlooding at Mataura
Map Location: -46.18797 168.855413
Comments:

Peak DischargeAnnual maximum flood discharge from Mataura River recorded during this flood at 340 cumecs

Heavy RainHeavy Rain at Invercargill
Map Location: -46.436318 168.35975
Comments:

Peak Rainfall2 in (5cm) of rainfall in Invercargill over 24 hours

FloodingFlooding at Otautau
Map Location: -46.143853 168.005563
Comments:

CommentMost serious flooding appears to have occurred at Otautau

EvacueesMore than 20 houses evacuated

ImpactFloodwaters from Aparima River poured in to a depth of several inches in houses

CommentThe banks along Otautau Stream saved main part of town from flooding

CommentOlder residents said present flood was not as serious as that of 1913

FloodingFlooding at Ohau
Comments:

ImpactWater from a flooded creek at Ohau poured into the opencast mine on 16/10/1946. At the peak of the flood there was ~18 ft (5.5m) of water in the mine, quantity est. as ~20,000,000 gallons and the mine expected to be clear in 5 or 6 days

References

Headline: Central Otago Floods.
Otago Daily Times, 17 October 1946.
Headline: Precautions Taken.
Otago Daily Times, 17 October 1946.
Headline: Rain in Southland, Flooding at Otautau.
Otago Daily Times, 17 October 1946.
Headline: Rivers Rise Sharply.
Otago Daily Times, 17 October 1946.
Headline: Flooding in Waitaki Area.
Otago Daily Times, 4 November 1948.
Headline: Record Level at Alexandra.
Otago Daily Times, 4 November 1948.
Surface Water Hydrology of the Mataura River Catchment.