12-150+ years
Heavy rain and snow melt brought flooding to the West Coast, Canterbury and Otago, damaging roads and causing evacuations. The flood in Alexandra was its biggest flood in history. A Civil Defence Emergency was delcared for Hakataramea in Canterbury.
A principal cause was the stalling of a front as it moved over the southern South Island. On the evening of the 11th, an active cold front crossed Fiordland and Southland, preceded by a long fetch of northerlies from the subtropics. During the 12th, this remained stationary, blocked by large high to east, while a weak southerly spread into eastern districts. Overrunning of moist warm air produced high rainfalls in eastern areas on this day. Convection also played a major role and helped heavy rain spill over well east of the divide. Snow melt helped turn this into a major flood event.
In the South Island, heavy rainfall and associated snow-melt resulted in abnormally high lake levels.
A number of trampers were trapped in the Arthur's Pass, Mouth Aspiring and South Westland areas.
Two day rainfalls in parts of Westland, Central Otago and inland south Canterbury were higher than previously recorded, with Return Periods exceeding 100 years.
Severe flooding and breaching of major South Island rivers occurred, including the Waitaki and Clutha Rivers.
A torrential storm hit the West Coast on the 11th.
Parts of Westland recorded over 500 mm (50.0 cm) of rain in two days.
The glacier region received about 600 mm (60.0 cm) of rain in 48 hours.
Roads and bridges were damaged.
State Highway 6 was closed between Whataroa and Haast due to slips and surface flooding.
Power and phone lines were cut. Power was cut to many South Westland regions after power lines were downed in two places on the Fox Hills and a tree broke the line near Paringa.
The Hokitika River at Colliers Creek recorded a maximum 48-hour fall of 786 mm (78.6 cm) on the 11th.
The Hokitika River at Colliers Creek recorded a maximum 72-hour fall of 831 mm (83.1 cm) on the 11th.
Cropp River Waterfall recorded 1049 mm (104.9 cm) of rain in 48 hours on the 12th and 13th (Return Period over 150 years, HIRDS1 gives 40 years). This was a record 48-hour rainfall for New Zealand.
Cropp Waterfall station recorded 2927 mm (292.7 cm) of rain in the month of December. This was the official record for one calendar month.
Franz Josef recorded 195 mm (19.5 cm) of rain in 24 hours on the 11th.
Franz Josef township recorded 397 mm (39.7 cm) of rain on the 12th.
Franz Josef recorded 592 mm (59.2 cm) of rain in 48 hours (Return Period 30 years). This was its highest 48-hour rainfall on record.
There was a washout at the approaches of the Waiho River bridge at Franz Josef.
The was general flooding in the proglacial area of Franz Josef Glacier from the 12th to the 14th.
There was an outburst flood at the snout of the glacier on the 13th. A large cavity was made in the terminal face of the glacier and a large amount of ice was discharged into the Waiho River.
Haast recorded 101 mm (10.1 cm) of rain in 24 hours on the 11th.
Haast recorded 146 mm (14.6 cm) of rain in 24 hours on the 12th.
The Turnbull River near Haast was very high.
The rock revertment on the true right bank of the Waiho River upstream of the bridge failed.
The third largest flood event in the Waiho River, based on the Whataroa record, occurred on the 13th.
The Whataroa River at the SH Bridge recorded a maximum 72-hour fall of 564 mm (56.4 cm) on the 10th.
The Whataroa River at the SH Bridge recorded a maximum 48-hour fall of 527 mm (52.7 cm) on the 11th.
State Highway 82 between Hakataramea and Waimate was closed due to flood waters.
Contributing factors were: a very wet spring causing lakes to rise well above their mean level, substantial snowmelt due to high temperatures, and heavy rainfall over 48 hours on the 12th and 13th.
A point inland from Timaru recorded 682 mm (68.2 cm) of rain in 24 hours.
Several houses were evacuated at Arundel.
A Civil Defence Emergency was declared for Hakataramea, Waimate district, at 9:15pm on the 14th, when the Waitaki River threatened to overflow, and was terminated at 8:02am on the 18th.
17 people were evacuated from seven houses at Hakataramea.
The town was isolated when the bridge over the Waitaki River was made unsafe by the flood. Flooding damaged several piers on the 150-metre long bridge.
A helicopter was in use from the 15th, ferrying people and supplies.
The Waitaki River was flowing at 2300 cumecs on the 15th.
Mt Cook recorded 445 mm (44.5 cm) of rain in 48 hours on the 12th and 13th (Return Period 12 years).
Panorama Ridge recorded 840 mm (84.0 cm) of rain in 48 hours on the 12th and 13th (Return Period 80 years).
A Civil Defence Emergency was declared for Omarama, Waitaki district, at 12:01am on the 14th and was terminated at 8:00am on the 14th.
35 people were evacuated from Omarama.
35 houses were evacuated at Otemata.
The Rangitata River caused flooding.
Ten houses were evacuated at Rangitata.
Residents in a towhship north of Rangitata fled their homes after the raging Rangitata River burst its banks.
The main trunk railway line was washed out near Rangitata.
The Waitaki River at Waitaki Dam had a peak flow of 3300 cumecs.
The Waitaki River at Waitaki Dam had a three-hour peak discharge of 300 cumecs.
The Waitaki River recorded its highest volumes since recordings began 55 years before.
Parts of Central Otago recorded over 100 mm (10.0 cm) of rain in two days.
Cherry Top crop in Central Otago was devastated by heavy rain.
Rain brought abnormally high lake levels, which flooded parts of Queenstown and Wanaka, and the major rivers flowing out of these and other mountain lakes flooded many properties downstream.
Main roads were blocked and damaged by flood waters.
Sections of State Highway 85 were scoured and flooded.
A number of Central Otago schools were closed.
The Balclutha-Clydevale road, the Stirling-Finegand road and the Beaumont-Clydevale-Waiwera road were closed on the 14th. The Clydevale Road was closed due to flooding at Moores Beach.
The Lindis Pass on State Highway 8 was the worst-affected road. State Highway 8 near Bendigo and State Highway 6 between Haast Pass and Mount Iron were also damaged.
The cost of repairing damaged roads in Central Otago was estimated at $750,000-$900,000 ($1,000,000-$1,200,000 2008 dollars).
Alexandra recorded 67.7 mm (6.8 cm) of rain in the 24 hours to 10am on the 13th.
Alexandra recorded 103 mm (10.3 cm) of rain in 48 hours (Return Period over 150 years).
Low lying areas of Alexandra were inundated. The bottom end of town was under water.
Alexandra was one of the worst-hit areas.
Six houses were evacuated at Alexandra. The Combined Rural Traders building was also evacuated.
Eight tourists were trapped by the raging headwaters of the Manuherikia River on the 13th, and had to be rescued by helicopter.
The Alexandra museum was sandbaggged.
Power was cut in Alexandra on the 14th as water submerged a transformer.
Some Alexandra houses were flooded. Two houses across the Manuherikia River were swamped and six houses were flooded on Manuherikia Road.
Alexandra had the worst flood in its 131-year history.
The Clutha River at its peak was 1.9 m above the 1994 level.
The Clutha River at the bridge peaked at 141.9 m above sea level.
Emergency sewage discharge occurred during the floods.
Schools in Alexandra were closed.
The Balclutha showgrounds were flooded.
The Lambourne Road dump was flooded, and rats were found in the area.
The flood at Balclutha peaked on the 15th.
Damage at Balclutha appeared superficial.
The only house affected was one that had some water seepage from under the floorboards.
The flood damage at Balclutha could be less than $10,000 ($13,000 2008 dollars).
Torrential rain and flood waters from the Manuherikia River caused damage in the Becks and Lauder townships.
The approach to the Becks bridge was washed away.
Becks School was closed for a time.
Water entered homes and businesses.
At the Roxburgh and Clyde dams, water was pouring out.
The Clutha River at Clyde Dam had a flood peak of 3050 cumecs on the 14th (Mosley and Pearsons).
The Clutha River at Clyde Dam had a peak flow of 2770 cumecs on the 14th (Otago Daily Times)
Houses were evacuated at Craigs Flat.
Orchards near Ettrick were swamped.
A bridge and State Highway 8 at Ettrick were flooded.
Hawea Flat recorded 169 mm (16.9 cm) of rain in 48 hours (Return Period over 150 years).
Torrential rain and flood waters from the Manuherikia River caused damage in the Becks and Lauder townships.
Water entered homes and businesses.
Lauder Service Station was flooded to 20 cm deep.
Makarora recorded 296 mm (29.6 cm) of rain in 48 hours (Return Period 20 years).
Schools in Millers Flat were closed.
The township was isolated, with State Highway 8 flooded and under water.
Omakau school was forced to close on the 13th.
The combination of river water and rain coming down the hills flooded a number of houses at Ophir.
Flood waters cut off roads in and out of the township. The road between Omakau and Ophir was closed on the 13th.
The Manuherikia River at the Ophir recording station had a peak flow of 595 cumecs on the 14th.
High lake levels flooded parts of Queenstown. The Queenstown shoreline was flooded.
Low lying areas of Roxburgh were inundated.
At the Roxburgh and Clyde dams, water was pouring out.
Houses were evacuated at Roxburgh.
High lake levels flooded parts of Wanaka.
12-150+ years
Heavy rain and snow melt brought flooding to the West Coast, Canterbury and Otago, damaging roads and causing evacuations. The flood in Alexandra was its biggest flood in history. A Civil Defence Emergency was delcared for Hakataramea in Canterbury.
A principal cause was the stalling of a front as it moved over the southern South Island. On the evening of the 11th, an active cold front crossed Fiordland and Southland, preceded by a long fetch of northerlies from the subtropics. During the 12th, this remained stationary, blocked by large high to east, while a weak southerly spread into eastern districts. Overrunning of moist warm air produced high rainfalls in eastern areas on this day. Convection also played a major role and helped heavy rain spill over well east of the divide. Snow melt helped turn this into a major flood event.
In the South Island, heavy rainfall and associated snow-melt resulted in abnormally high lake levels.
A number of trampers were trapped in the Arthur's Pass, Mouth Aspiring and South Westland areas.
Two day rainfalls in parts of Westland, Central Otago and inland south Canterbury were higher than previously recorded, with Return Periods exceeding 100 years.
Severe flooding and breaching of major South Island rivers occurred, including the Waitaki and Clutha Rivers.
A torrential storm hit the West Coast on the 11th.
Parts of Westland recorded over 500 mm (50.0 cm) of rain in two days.
The glacier region received about 600 mm (60.0 cm) of rain in 48 hours.
Roads and bridges were damaged.
State Highway 6 was closed between Whataroa and Haast due to slips and surface flooding.
Power and phone lines were cut. Power was cut to many South Westland regions after power lines were downed in two places on the Fox Hills and a tree broke the line near Paringa.
The Hokitika River at Colliers Creek recorded a maximum 48-hour fall of 786 mm (78.6 cm) on the 11th.
The Hokitika River at Colliers Creek recorded a maximum 72-hour fall of 831 mm (83.1 cm) on the 11th.
Cropp River Waterfall recorded 1049 mm (104.9 cm) of rain in 48 hours on the 12th and 13th (Return Period over 150 years, HIRDS1 gives 40 years). This was a record 48-hour rainfall for New Zealand.
Cropp Waterfall station recorded 2927 mm (292.7 cm) of rain in the month of December. This was the official record for one calendar month.
Franz Josef recorded 195 mm (19.5 cm) of rain in 24 hours on the 11th.
Franz Josef township recorded 397 mm (39.7 cm) of rain on the 12th.
Franz Josef recorded 592 mm (59.2 cm) of rain in 48 hours (Return Period 30 years). This was its highest 48-hour rainfall on record.
There was a washout at the approaches of the Waiho River bridge at Franz Josef.
The was general flooding in the proglacial area of Franz Josef Glacier from the 12th to the 14th.
There was an outburst flood at the snout of the glacier on the 13th. A large cavity was made in the terminal face of the glacier and a large amount of ice was discharged into the Waiho River.
Haast recorded 101 mm (10.1 cm) of rain in 24 hours on the 11th.
Haast recorded 146 mm (14.6 cm) of rain in 24 hours on the 12th.
The Turnbull River near Haast was very high.
The rock revertment on the true right bank of the Waiho River upstream of the bridge failed.
The third largest flood event in the Waiho River, based on the Whataroa record, occurred on the 13th.
The Whataroa River at the SH Bridge recorded a maximum 72-hour fall of 564 mm (56.4 cm) on the 10th.
The Whataroa River at the SH Bridge recorded a maximum 48-hour fall of 527 mm (52.7 cm) on the 11th.
State Highway 82 between Hakataramea and Waimate was closed due to flood waters.
Contributing factors were: a very wet spring causing lakes to rise well above their mean level, substantial snowmelt due to high temperatures, and heavy rainfall over 48 hours on the 12th and 13th.
A point inland from Timaru recorded 682 mm (68.2 cm) of rain in 24 hours.
Several houses were evacuated at Arundel.
A Civil Defence Emergency was declared for Hakataramea, Waimate district, at 9:15pm on the 14th, when the Waitaki River threatened to overflow, and was terminated at 8:02am on the 18th.
17 people were evacuated from seven houses at Hakataramea.
The town was isolated when the bridge over the Waitaki River was made unsafe by the flood. Flooding damaged several piers on the 150-metre long bridge.
A helicopter was in use from the 15th, ferrying people and supplies.
The Waitaki River was flowing at 2300 cumecs on the 15th.
Mt Cook recorded 445 mm (44.5 cm) of rain in 48 hours on the 12th and 13th (Return Period 12 years).
Panorama Ridge recorded 840 mm (84.0 cm) of rain in 48 hours on the 12th and 13th (Return Period 80 years).
A Civil Defence Emergency was declared for Omarama, Waitaki district, at 12:01am on the 14th and was terminated at 8:00am on the 14th.
35 people were evacuated from Omarama.
35 houses were evacuated at Otemata.
The Rangitata River caused flooding.
Ten houses were evacuated at Rangitata.
Residents in a towhship north of Rangitata fled their homes after the raging Rangitata River burst its banks.
The main trunk railway line was washed out near Rangitata.
The Waitaki River at Waitaki Dam had a peak flow of 3300 cumecs.
The Waitaki River at Waitaki Dam had a three-hour peak discharge of 300 cumecs.
The Waitaki River recorded its highest volumes since recordings began 55 years before.
Parts of Central Otago recorded over 100 mm (10.0 cm) of rain in two days.
Cherry Top crop in Central Otago was devastated by heavy rain.
Rain brought abnormally high lake levels, which flooded parts of Queenstown and Wanaka, and the major rivers flowing out of these and other mountain lakes flooded many properties downstream.
Main roads were blocked and damaged by flood waters.
Sections of State Highway 85 were scoured and flooded.
A number of Central Otago schools were closed.
The Balclutha-Clydevale road, the Stirling-Finegand road and the Beaumont-Clydevale-Waiwera road were closed on the 14th. The Clydevale Road was closed due to flooding at Moores Beach.
The Lindis Pass on State Highway 8 was the worst-affected road. State Highway 8 near Bendigo and State Highway 6 between Haast Pass and Mount Iron were also damaged.
The cost of repairing damaged roads in Central Otago was estimated at $750,000-$900,000 ($1,000,000-$1,200,000 2008 dollars).
Alexandra recorded 67.7 mm (6.8 cm) of rain in the 24 hours to 10am on the 13th.
Alexandra recorded 103 mm (10.3 cm) of rain in 48 hours (Return Period over 150 years).
Low lying areas of Alexandra were inundated. The bottom end of town was under water.
Alexandra was one of the worst-hit areas.
Six houses were evacuated at Alexandra. The Combined Rural Traders building was also evacuated.
Eight tourists were trapped by the raging headwaters of the Manuherikia River on the 13th, and had to be rescued by helicopter.
The Alexandra museum was sandbaggged.
Power was cut in Alexandra on the 14th as water submerged a transformer.
Some Alexandra houses were flooded. Two houses across the Manuherikia River were swamped and six houses were flooded on Manuherikia Road.
Alexandra had the worst flood in its 131-year history.
The Clutha River at its peak was 1.9 m above the 1994 level.
The Clutha River at the bridge peaked at 141.9 m above sea level.
Emergency sewage discharge occurred during the floods.
Schools in Alexandra were closed.
The Balclutha showgrounds were flooded.
The Lambourne Road dump was flooded, and rats were found in the area.
The flood at Balclutha peaked on the 15th.
Damage at Balclutha appeared superficial.
The only house affected was one that had some water seepage from under the floorboards.
The flood damage at Balclutha could be less than $10,000 ($13,000 2008 dollars).
Torrential rain and flood waters from the Manuherikia River caused damage in the Becks and Lauder townships.
The approach to the Becks bridge was washed away.
Becks School was closed for a time.
Water entered homes and businesses.
At the Roxburgh and Clyde dams, water was pouring out.
The Clutha River at Clyde Dam had a flood peak of 3050 cumecs on the 14th (Mosley and Pearsons).
The Clutha River at Clyde Dam had a peak flow of 2770 cumecs on the 14th (Otago Daily Times)
Houses were evacuated at Craigs Flat.
Orchards near Ettrick were swamped.
A bridge and State Highway 8 at Ettrick were flooded.
Hawea Flat recorded 169 mm (16.9 cm) of rain in 48 hours (Return Period over 150 years).
Torrential rain and flood waters from the Manuherikia River caused damage in the Becks and Lauder townships.
Water entered homes and businesses.
Lauder Service Station was flooded to 20 cm deep.
Makarora recorded 296 mm (29.6 cm) of rain in 48 hours (Return Period 20 years).
Schools in Millers Flat were closed.
The township was isolated, with State Highway 8 flooded and under water.
Omakau school was forced to close on the 13th.
The combination of river water and rain coming down the hills flooded a number of houses at Ophir.
Flood waters cut off roads in and out of the township. The road between Omakau and Ophir was closed on the 13th.
The Manuherikia River at the Ophir recording station had a peak flow of 595 cumecs on the 14th.
High lake levels flooded parts of Queenstown. The Queenstown shoreline was flooded.
Low lying areas of Roxburgh were inundated.
At the Roxburgh and Clyde dams, water was pouring out.
Houses were evacuated at Roxburgh.
High lake levels flooded parts of Wanaka.