Taranaki was hit by a small tornado on the 31st of July while Canterbury, Otago and Stewart Island experience heavy rain, flooding and landslides from the 29th of July to the 1st of August.
On the 27th and 28th, a low developed in the north of the Tasman Sea. On the 29th, the low deepened rapidly and moved south, becoming slow moving to the west and central of New Zealand by the 30th. The large low pressure system also set up a moist easterly flow over southern New Zealand, which lead to rain and flooding, as well as the unsettled weather in the North Island (such as tornadoes) on the 31st.
On the 29th, MetService issued a heavy rain warning for South Canterbury and the eastern parts of Otago. A strong and moist easterly flow brought 40 mm of rain to the eastern Otago ranges overnight and a further 80 to 120mm are likely there on 31st and into the early hours of the 1st of August. The South Canterbury hills area is likely to have around 80 mm of rain in total, easing on the 30th.
Transit NZ advised caution on all South Island roads overnight on the 30th, due to ice, grit and surface flooding.
A spate of road closures were in effect in Otago and South Canterbury on the night of the 30th, as parts experienced severe surface flooding.
A small tornado swept through Waitara in Taranaki on the morning of the 31st.
Two 4-tonne trailers were thrown on their sides, iron roofing was ripped and the large roller doors were crumpledf rom a New Plymouth trucking company's warehouse.
The tornado only caused cosmetic damage and there were no other reports of damage.
It caused chaos for 15-20 seconds then disappeared.
Several people reported seeing the twister make its way inland from the sea.
Rain was brought in by a moist easterly on the 29th and 30th and was mostly in the northern part of south Canterbury, in the foothills. The heavy rain continued for 18 hours before abated on the night of the 30th.
The foothills and plains of Canterbury had around 4.0 cm of rain from midnight on the 29th.
There were only light showers in the Mackenzie country.
Civil Defence emergency operation centre in Waimate closed down as rain eased.
There was heavy rain in mid Canterbury overnight on the 30th and on the morning of the 31st.
Along the coast, mid Canterbury farms had water pooling on the ground.
There was surface flooding in south Canterbury. Flooding closed roads, caused at least one school to send pupils home early and cut phone links to some homes.
There was a heavy swell warning in place. Heavy sea swells pounded the coast between Banks Peninsula and Timaru. It caused minor flooding of farmland and knocked rocks off the eastern extension at the Port of Timaru.
There was a bit of minor overtopping of sea on beaches around the Seadown area.
Waihao River was running higher than other local rivers.
Waimate recorded 4.2 cm of rain in four hours. Waimate bore the brunt of the heavy rain on the 30th in South Canterbury.
Several schools in the Waimate area were closed on the 30th due to flooding.
The Civil Defence headquarters in Waimate was activated.
There was extensive surface flooding around Waimate.
Roads around Morven were extremely dangerous.
Glenavy and Morven Schools were closed early. Morven School children went home on bus at lunchtime due to fords and irrigation races filling up and flooding on the road
In the Morven-Glenavy area, 55 ml of rain fell in the 24 hours, half of which fell in the space of two or three hours.
There was significant flooding on State Highway 1 in the Morven and Glenavy area.
People were advised not to drive on district roads.
The township itself was flooded.
A farmer said the Morven Drain overflowed over his paddocks.
Lake Opuha farm recorded 3.2 cm of rain.
Hadlow recorded 4.4 cm of rain.
Ashburton recorded 3.28 cm of rain overnight to 9am on the 31st.
Methven recorded 3.25 cm of rain.
Precipitation fell as snow on Mt Hutt. The Mt Hutt Ski Area received 22 cm of snow by 8am on the 31st and it was not open during morning due to the heavy snow.
A Lowcliffe farmer said they had approximately 1 1/2 inches (3.81 cm) of rain.
Council workers blamed illegal plumbing for overloading the sewer system, which caused effluent-laden water to spew out from manholes.
Otago received a months worth of rain in just 24 hours.
Persistent rain caused widespread flooding from Balclutha to South Canterbury on the 30th.
Rainfall exceeded 10.0 cm at several sites in the North Otago, Dunedin and Taieri districts.
Civil Defence emergency operation centre in Dunedin closed down as rain eased.
Police discouraged any non-essential travel in North Otago because of road conditions.
Civil Defence headquarters in Otago were activated on the 30th.
There was extensive flooding along coastal parts of Otago, with many roads and highways north and south of Dunedin cut by floodwaters. Flooding closed State Highway 1 between Dunedin and Balclutha, Waikouaiti and Milton, and closed State Highway 38 between Pukeuri and Duntroon. State Highway 1, north of Oamaru, was closed and some parts of the highway were down to one lane but passable. State Highway 8, linking Milton with central Otago, was closed near Clarksville.
Several roads, including parts of State Highway 1 south of Milton, remained closed on the 31st.
Some motorists had to be rescued during the rain on the 30th when they were swamped trying to drive through flooded areas of North Otago. There were several crashes on the roads.
Water was waist deep running down State Highway 1 "like a river".
Several rivers in the district remained at flood warning levels.
Pine Hill recorded over 73 ml of rain in 24 hours.
Dunedin Airport recorded 8.1 cm of rain in 24 hours on the 30th. This rainfall almost doubled the July average.
The Fire Service helped residents hit by flooding in Dunedin suburbs of Outram and Abbotsford.
Some people chose to leave their homes overnight.
Rain was steady so rivers and streams were able to deal with most of it.
The Water of Leith was a raging torrent on the night of the 30th.
Dunedin streets were awash with water.
Residents reported flooding in the flat areas of Dunedin.
There was a State of Emergency in place in the Clutha District after heavy rain and flooding prompted evacuations in the area on the night of the 30th.
Nine people were evacuated at approximately 8pm as water and sewage began entering some homes. And several people evacuated from low-lying areas in the town late on the night of the 30th.
Several other people left their homes of their own accord.
Flooding on roads meant school buses wouldn't be running and schools were closed until further notice.
Clutha District Council reported parts of the Catlins, especially Papatowai, as well as Kaitangata, were badly affected by flooding.
Taieri Plain recorded 10.4 cm of rain in 48 hours.
Taieri Plain recorded 1.25 cm of rain on the 29th.
Taieri Plain recorded 9.15 cm of rain on the 30th.
A school and houses in Mosgiel were evacuated as Silver Stream reached very high levels and continued to rise.
At 8:30pm on the 30th, Silver Stream was sitting at 147 cumecs after earlier reaching a peak of 157 cumecs. The usual flow for Silver Stream is one cumec.
Taieri River was flowing at 800 cumecs at Outram at 8:30pm on the 30th and was still rising.
Three houses in Mosgiel were evacuated after being flooded with stormwater.
Pupils at East Taieri Primary School sent home at lunchtime on the 30th as Owhiro Stream swamped the school playground.
Residents in Mill Creek subdivision on Taieri Plain were also leaving their houses on the 30th.
Three Mile Hill Road, a major route into Mosgiel, was closed on the 30th due to flooding.
Milton recorded over 9.0 cm of rain on the 30th.
Milton was worst affected area and a State of Emergency was declared around Milton on the night of the 30th.
The Milton Volunteer Fire Bridgade received the first evacuation call at 2:50am on the 30th in Waihola.
Up to 30 houses were damaged by floodwaters or sewage.
St Mary's Primary School was shut on the 31st.
46 people were confirmed to have evacuated from their homes in Milton.
13-22 houses were deemed "uninhabitable" and unsafe for residents to return to.
On the 31st, one Milton house still had water 35 cm deep in the living room.
No injuries were reported as of the 1st of August.
Flooding wreaked havoc on residents living on the outskirts of Milton.
One farm on the main road on the south of town lost 10-12 lambs on the night of the 30th.
Flooding on roads between Milton and Waihola had motorists up to their bumpers in water in several places along State Highway 1 on the 30th.
Flooding in Waihola led to the closure of the main road through town just before 5pm on the 30th.
Road closures at 5:30pm on the 30th were North Branch Road, Finch Road, the Back Road, Circle Hill Road, Ossian Street, Spenser Street and Keinan Avenue. Lakeside Road from Station Road to State Highway 1 was also closed.
CDE was declared for the Bruce Ward at 8:40pm on the 30th and was lifted at 9am on the 31st.
Road closures at 3:30pm on the 1st of August were Toko Mouth Road and Falla Burn Road from Hillend Road to State Highway 8.
People were urged to keep out of the flooded areas as much as possible because of sewage contamination.
38 homeless Milton residents had their homes devastated by the floods.
14 houses were still uninhabitable in south Milton on the 13th.
6 of the 14 affected properties were rentals and some didn't have contents insurance.
Residents of three Happy Valley houses, south of Palmerston, were evacuated on the night of the 30th and returned on the night of the 31st.
High winds and heavy seas played havoc, pulling roads into the sea and causing landslips 30 m wide.
Oban (Halfmoon Bay) recorded 11.8 cm of rain from the 25th to the 31st.
The flooding left some residents without access to their homes.
Heavy seas sank a yacht after ripping it from its moorings near Thule early on the morning of the 30th.
South West Cape recorded 17.7 cm of rain from the 25th to the 31st. It was a record rainfall.
Taranaki was hit by a small tornado on the 31st of July while Canterbury, Otago and Stewart Island experience heavy rain, flooding and landslides from the 29th of July to the 1st of August.
On the 27th and 28th, a low developed in the north of the Tasman Sea. On the 29th, the low deepened rapidly and moved south, becoming slow moving to the west and central of New Zealand by the 30th. The large low pressure system also set up a moist easterly flow over southern New Zealand, which lead to rain and flooding, as well as the unsettled weather in the North Island (such as tornadoes) on the 31st.
On the 29th, MetService issued a heavy rain warning for South Canterbury and the eastern parts of Otago. A strong and moist easterly flow brought 40 mm of rain to the eastern Otago ranges overnight and a further 80 to 120mm are likely there on 31st and into the early hours of the 1st of August. The South Canterbury hills area is likely to have around 80 mm of rain in total, easing on the 30th.
Transit NZ advised caution on all South Island roads overnight on the 30th, due to ice, grit and surface flooding.
A spate of road closures were in effect in Otago and South Canterbury on the night of the 30th, as parts experienced severe surface flooding.
A small tornado swept through Waitara in Taranaki on the morning of the 31st.
Two 4-tonne trailers were thrown on their sides, iron roofing was ripped and the large roller doors were crumpledf rom a New Plymouth trucking company's warehouse.
The tornado only caused cosmetic damage and there were no other reports of damage.
It caused chaos for 15-20 seconds then disappeared.
Several people reported seeing the twister make its way inland from the sea.
Rain was brought in by a moist easterly on the 29th and 30th and was mostly in the northern part of south Canterbury, in the foothills. The heavy rain continued for 18 hours before abated on the night of the 30th.
The foothills and plains of Canterbury had around 4.0 cm of rain from midnight on the 29th.
There were only light showers in the Mackenzie country.
Civil Defence emergency operation centre in Waimate closed down as rain eased.
There was heavy rain in mid Canterbury overnight on the 30th and on the morning of the 31st.
Along the coast, mid Canterbury farms had water pooling on the ground.
There was surface flooding in south Canterbury. Flooding closed roads, caused at least one school to send pupils home early and cut phone links to some homes.
There was a heavy swell warning in place. Heavy sea swells pounded the coast between Banks Peninsula and Timaru. It caused minor flooding of farmland and knocked rocks off the eastern extension at the Port of Timaru.
There was a bit of minor overtopping of sea on beaches around the Seadown area.
Waihao River was running higher than other local rivers.
Waimate recorded 4.2 cm of rain in four hours. Waimate bore the brunt of the heavy rain on the 30th in South Canterbury.
Several schools in the Waimate area were closed on the 30th due to flooding.
The Civil Defence headquarters in Waimate was activated.
There was extensive surface flooding around Waimate.
Roads around Morven were extremely dangerous.
Glenavy and Morven Schools were closed early. Morven School children went home on bus at lunchtime due to fords and irrigation races filling up and flooding on the road
In the Morven-Glenavy area, 55 ml of rain fell in the 24 hours, half of which fell in the space of two or three hours.
There was significant flooding on State Highway 1 in the Morven and Glenavy area.
People were advised not to drive on district roads.
The township itself was flooded.
A farmer said the Morven Drain overflowed over his paddocks.
Lake Opuha farm recorded 3.2 cm of rain.
Hadlow recorded 4.4 cm of rain.
Ashburton recorded 3.28 cm of rain overnight to 9am on the 31st.
Methven recorded 3.25 cm of rain.
Precipitation fell as snow on Mt Hutt. The Mt Hutt Ski Area received 22 cm of snow by 8am on the 31st and it was not open during morning due to the heavy snow.
A Lowcliffe farmer said they had approximately 1 1/2 inches (3.81 cm) of rain.
Council workers blamed illegal plumbing for overloading the sewer system, which caused effluent-laden water to spew out from manholes.
Otago received a months worth of rain in just 24 hours.
Persistent rain caused widespread flooding from Balclutha to South Canterbury on the 30th.
Rainfall exceeded 10.0 cm at several sites in the North Otago, Dunedin and Taieri districts.
Civil Defence emergency operation centre in Dunedin closed down as rain eased.
Police discouraged any non-essential travel in North Otago because of road conditions.
Civil Defence headquarters in Otago were activated on the 30th.
There was extensive flooding along coastal parts of Otago, with many roads and highways north and south of Dunedin cut by floodwaters. Flooding closed State Highway 1 between Dunedin and Balclutha, Waikouaiti and Milton, and closed State Highway 38 between Pukeuri and Duntroon. State Highway 1, north of Oamaru, was closed and some parts of the highway were down to one lane but passable. State Highway 8, linking Milton with central Otago, was closed near Clarksville.
Several roads, including parts of State Highway 1 south of Milton, remained closed on the 31st.
Some motorists had to be rescued during the rain on the 30th when they were swamped trying to drive through flooded areas of North Otago. There were several crashes on the roads.
Water was waist deep running down State Highway 1 "like a river".
Several rivers in the district remained at flood warning levels.
Pine Hill recorded over 73 ml of rain in 24 hours.
Dunedin Airport recorded 8.1 cm of rain in 24 hours on the 30th. This rainfall almost doubled the July average.
The Fire Service helped residents hit by flooding in Dunedin suburbs of Outram and Abbotsford.
Some people chose to leave their homes overnight.
Rain was steady so rivers and streams were able to deal with most of it.
The Water of Leith was a raging torrent on the night of the 30th.
Dunedin streets were awash with water.
Residents reported flooding in the flat areas of Dunedin.
There was a State of Emergency in place in the Clutha District after heavy rain and flooding prompted evacuations in the area on the night of the 30th.
Nine people were evacuated at approximately 8pm as water and sewage began entering some homes. And several people evacuated from low-lying areas in the town late on the night of the 30th.
Several other people left their homes of their own accord.
Flooding on roads meant school buses wouldn't be running and schools were closed until further notice.
Clutha District Council reported parts of the Catlins, especially Papatowai, as well as Kaitangata, were badly affected by flooding.
Taieri Plain recorded 10.4 cm of rain in 48 hours.
Taieri Plain recorded 1.25 cm of rain on the 29th.
Taieri Plain recorded 9.15 cm of rain on the 30th.
A school and houses in Mosgiel were evacuated as Silver Stream reached very high levels and continued to rise.
At 8:30pm on the 30th, Silver Stream was sitting at 147 cumecs after earlier reaching a peak of 157 cumecs. The usual flow for Silver Stream is one cumec.
Taieri River was flowing at 800 cumecs at Outram at 8:30pm on the 30th and was still rising.
Three houses in Mosgiel were evacuated after being flooded with stormwater.
Pupils at East Taieri Primary School sent home at lunchtime on the 30th as Owhiro Stream swamped the school playground.
Residents in Mill Creek subdivision on Taieri Plain were also leaving their houses on the 30th.
Three Mile Hill Road, a major route into Mosgiel, was closed on the 30th due to flooding.
Milton recorded over 9.0 cm of rain on the 30th.
Milton was worst affected area and a State of Emergency was declared around Milton on the night of the 30th.
The Milton Volunteer Fire Bridgade received the first evacuation call at 2:50am on the 30th in Waihola.
Up to 30 houses were damaged by floodwaters or sewage.
St Mary's Primary School was shut on the 31st.
46 people were confirmed to have evacuated from their homes in Milton.
13-22 houses were deemed "uninhabitable" and unsafe for residents to return to.
On the 31st, one Milton house still had water 35 cm deep in the living room.
No injuries were reported as of the 1st of August.
Flooding wreaked havoc on residents living on the outskirts of Milton.
One farm on the main road on the south of town lost 10-12 lambs on the night of the 30th.
Flooding on roads between Milton and Waihola had motorists up to their bumpers in water in several places along State Highway 1 on the 30th.
Flooding in Waihola led to the closure of the main road through town just before 5pm on the 30th.
Road closures at 5:30pm on the 30th were North Branch Road, Finch Road, the Back Road, Circle Hill Road, Ossian Street, Spenser Street and Keinan Avenue. Lakeside Road from Station Road to State Highway 1 was also closed.
CDE was declared for the Bruce Ward at 8:40pm on the 30th and was lifted at 9am on the 31st.
Road closures at 3:30pm on the 1st of August were Toko Mouth Road and Falla Burn Road from Hillend Road to State Highway 8.
People were urged to keep out of the flooded areas as much as possible because of sewage contamination.
38 homeless Milton residents had their homes devastated by the floods.
14 houses were still uninhabitable in south Milton on the 13th.
6 of the 14 affected properties were rentals and some didn't have contents insurance.
Residents of three Happy Valley houses, south of Palmerston, were evacuated on the night of the 30th and returned on the night of the 31st.
High winds and heavy seas played havoc, pulling roads into the sea and causing landslips 30 m wide.
Oban (Halfmoon Bay) recorded 11.8 cm of rain from the 25th to the 31st.
The flooding left some residents without access to their homes.
Heavy seas sank a yacht after ripping it from its moorings near Thule early on the morning of the 30th.
South West Cape recorded 17.7 cm of rain from the 25th to the 31st. It was a record rainfall.