Severe Weather Warnings & Watches

Heavy rain and severe gales for parts of New Zealand, including the Chatham Islands
A series of active fronts and troughs embedded in disturbed westerlies continue to affect New Zealand until Wednesday. These fronts are expected to bring further periods of heavy rain and gale force winds to many regions of southern and central New Zealand, where heavy rain and strong wind warnings and watches remain in force.

People are advised to stay up to date with the latest forecasts in case any changes are made or further areas are added.

Heavy Rain Warning
Heavy rain may cause streams and rivers to rise rapidly. Surface flooding and slips are also possible and driving conditions may be hazardous.

Area: Buller and Nelson west of Motueka, also the Nelson Lakes
Valid: 28 hours from 9:00pm Monday to 1:00am Wednesday
Forecast: Periods of heavy rain. Expect 100 to 130mm of rain to accumulate about the ranges, and 40 to 70mm near the coast. Peak intensities of 10 to 15mm per hour, especially in possible thunderstorms.

Area: Tararua Range
Valid: 12 hours from 4:00am to 4:00pm Tuesday
Forecast: Expect 70 to 90mm of rain to accumulate. Peak intensities of 10 to 15mm per hour. Note, further heavy rain is possible overnight Tuesday to Wednesday.

Area: Headwaters of Canterbury lakes and rivers
Valid: 5 hours from 9:00pm Monday to 2:00am Tuesday
Forecast: Expect a further 60 to 80mm of rain to accumulate on top of what has already fallen near the main divide, and 30 to 60mm within 15km east of the divide. Peak intensities of 10 to 15mm per hour near the main divide, especially in thunderstorms.

Area: Westland about and south of Otira
Valid: 26 hours from 9:00pm Monday to 11:00pm Tuesday
Forecast: Periods of heavy rain. Expect a further 70 to 100mm of rain to accumulate about the ranges on the top of what has already fallen, and 30 to 60mm nearer the coast. Peak intensities of 10 to 15mm per hour about the ranges. Heavy rain may be accompanied by thunderstorms.

Area: Fiordland
Valid: 9 hours from 9:00pm Monday to 6:00am Tuesday
Forecast: Expect a further 40 to 60mm of rain to accumulate on top of what has already fallen. Peak rates of 10 to 15mm/h, especially in thunderstorms.

Strong Wind Warning
Strong wind gusts could damage trees, powerlines and unsecured structures. Driving may be hazardous, especially for high-sided vehicles and motorcycles.

Area: Wairarapa, Wellington and Marlborough about and north of Ward
Valid: 18 hours from 9:00pm Monday to 3:00pm Tuesday
Forecast: Northwest gales are expected to become severe in exposed places, gusting 120 km/h or possibly 130 km/h about Wellington.

Area: Canterbury High Country north of Rakaia river, and Marlborough south of Ward
Valid: 6 hours from 9:00pm Monday to 3:00am Tuesday
Forecast: Northwest gales are forecast to become severe in exposed places at times, with gusts reaching 120 km/h.

Heavy Rain Watch
Area: Ranges of Bay Of Plenty east of Whakatane
Valid: 11 hours from 4:00pm Tuesday to 3:00am Wednesday
Forecast: Periods of heavy rain. Rainfall accumulations may approach warning criteria.

Area: Taranaki about and north of the Mountain, also Taumarunui and Taihape including Tongariro National Park
Valid: 12 hours from 6:00am to 6:00pm Tuesday
Forecast: Periods of heavy rain. Rainfall accumulations may approach warning criteria.

Area: Westland north of Otira
Valid: 28 hours from 9:00pm Monday to 1:00am Wednesday
Forecast: Periods of heavy rain with possible thunderstorms. Rainfall accumulations may approach warning criteria, especially about the ranges.

Strong Wind Watch
Area: Nelson west of Motueka, Buller and Westland north of Hokitika
Valid: 5 hours from 9:00pm Monday to 2:00am Tuesday
Forecast: North to northwest winds may approach severe gale in exposed places at times.

Area: Canterbury Plains including Christchurch
Valid: 3 hours from 9:00pm Monday to 12:00am Tuesday
Forecast: Northwest winds may approach severe gale in exposed places at times, especially about Banks Peninsula.

Area: Chatham Islands
Valid: 8 hours from 6:00pm Tuesday to 2:00am Wednesday
Forecast: Northerly winds may approach severe gale at times.

An update for severe weather will be issued by 10:00am Tuesday 17 Aug 2021.

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Road Snowfall Warnings
Issued: 8:38am Tuesday 17 Aug 2021

 

Lewis Pass (SH7)
Valid: 23 hours from 11:00am Tuesday to 10:00am Wednesday
Forecast: Periods of snow showers are likely from late this morning until Wednesday morning. During this time, 4 to 6cm of snow may accumulate near the summit, with lesser amounts down to 700 metres.

Arthur’s Pass (SH73)
Valid: 23 hours from 8:00am Tuesday to 7:00am Wednesday
Forecast: Periods of snow are likely until Wednesday morning. 2 to 5cm of snow may accumulate near the summit, with lesser amounts down to 700 metres.

Haast Pass (SH6)
Valid: 8 hours from 8:00am to 4:00pm Tuesday
Forecast: Snow flurries are possible near the summit of the road until late afternoon. Little, if any, snow is likely to settle on the road.

Lindis Pass (SH8)
Valid: 5 hours from 8:00am to 1:00pm Tuesday
Forecast: Further snow showers are likely above 800 metres until early afternoon. A further 1cm of snow may accumulate near the summit.

Crown Range Road
Valid: 5 hours from 8:00am to 1:00pm Tuesday
Forecast: Snow showers are expected to continue this morning and early afternoon. A further 1 to 2cm of snow may accumulate near the summit, with lesser amounts down to 800 metres.

Milford Road (SH94)
Valid: 10 hours from 8:00am to 6:00pm Tuesday
Forecast: Snow is expected through to evening. A further 10 to 20cm of snow may accumulate near the summit during this time, with lesser amounts down to 600 metres.

An update for Road Snowfall Warnings will be issued by 10:00 pm Tuesday 17 Aug 2021

There are no Road Snowfall Warnings in force for Napier-Taupo Road (SH5), Desert Road (SH1), Remutaka Hill Road (SH2), Porters Pass (SH73), Dunedin to Waitati Highway (SH1)