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National Climate Summary – June 2008:


NATIONAL CLIMATE CENTRE

Tuesday 1 July 2008

National Climate Summary – June 2008: Warm in most places especially south of South Island; Wet in Waikato and North Canterbury and dry in Marlborough and Otago

- Temperature: Warm overall; inland South Canterbury and Otago more than 1.5 °C above average;
- Rainfall: Below normal rainfall (around 50% of normal) in north of South Island and Otago; above normal (around 150% or more of normal) in North Canterbury, inland Manawatu, the Central Plateau and Waikato;
- Sunshine: Above normal hours of bright sunshine recorded for most of country.

June, in contrast to May, was much warmer than average in places especially inland South Canterbury and Otago, with temperatures 1.5 to 2°C above average. Average daily maximum temperatures were between 2 and 3°C above average in these same areas. The national average temperature of 8.9°C was 0.5 °C above average, and only slightly cooler than May. Record high extreme daily maximum temperatures occurred in a few South Island locations. It was much sunnier than normal in eastern areas of the North Island, the north of the South Island, Tekapo, Central Otago and Southland.

Rainfall was below normal in Nelson, Marlborough and Otago, with totals around 50% of normal for the month of June. In contrast, rainfall in North Canterbury, inland Manawatu, the Central Plateau, Waikato, and eastern Auckland was well above normal for the month, being between 140 and 190% of normal. In terms of other extremes, the weather got very boisterous from the 22nd to the 29th, with thunderstorms, hail, lightning and high winds affecting the upper North Island through to the 27th, then strong southerlies bringing snow to the Central Plateau on the 28th, and gale force winds in the Wellington area on the 29th. More anticyclones than normal occurred in the Tasman Sea and to the east of New Zealand, with stronger westerlies over New Zealand and to the south.

Further Highlights:
- The highest temperature during June 2008 was 23.1°C recorded at Waipara West on the 15th. This was only 0.9°C below the record South Island temperature for June of 24.0°C recorded at Kaikoura and Temuka on 2 June 1976. Westport Airport, Haast, Appleby, Blenheim Research Centre and Tekapo recorded their highest ever June maximum air temperatures.
- The lowest air temperature during the month was -7.5ºC recorded at Hanmer Forest on the 8th.
- The highest 1-day rainfall was 152 mm recorded at Milford Sound on the 6th.
- The highest wind gust for the month was 183 km/h at Hicks Bay on the 18th.
- Of the five main centres, Auckland was the warmest and the wettest. Hamilton the sunniest, Christchurch the coldest, and Dunedin the driest.

Temperature: Mean temperatures were particularly warm in inland South Canterbury and Otago, being 1.5 to 2 °C above average. Western and northern North Island areas were also warmer than normal for June (by between 0.5 to 1 °C).
Rainfall: Rainfall was about half (50 percent) of normal in Nelson/Marlborough and Otago, and about one and a half (150%) times normal or more in North Canterbury, inland Manawatu, Central Plateau, Waikato, and eastern Auckland.
Sunshine: June totals of bright sunshine were above average (at least 110 percent of normal) throughout much of the country. Sunshine totals were well above average (125 percent or more of normal)in Hawke’s Bay, Wairarapa, eastern Marlborough, Tekapo, Central Otago and Southland.

For further information, please contact:
Dr Andrew Tait – Climate Scientist – NIWA National Climate Centre, Wellington,
Tel. (04) 386 0562 (work) or (027) 327 7948 (mobile); or
Dr James Renwick – Climate Scientist– NIWA National Climate Centre, Wellington,
Tel. (04) 386 0343 (work) or (021) 178 5550 (mobile)
TEMPERATURE: WARM – ABOVE AVERAGE IN MOST AREAS

The national average temperature of 8.9°C was 0.5 °C above average. Mean temperatures were particularly high in inland South Canterbury and Otago, being 1.5 to 2 °C above average. Western and northern North Island areas were also warmer than normal for June (by between 0.5 to 1 °C). Mean temperatures were between 0.5 to 1 °C lower than average in coastal southern Hawke’s Bay. Average daily maximum temperatures were more than 2 °C above average in Leigh, Mt Cook, Darfield, Queenstown and Wanaka; and over 3°C above average in Lake Tekapo. Average daily minimum temperatures were more than 2°C above average in Kaitaia, Dargaville, North Shore, and Whitianga but were lower than normal (by as much as 1 °C) in southern Hawke’s Bay and Tararua District.

Near record high mean daily air temperatures were recorded at:

Location Mean air
temperature
(ºC) Departure
from
Normal Year
Records
began Comments
Kaikohe 12.9 +1.4 1973 3rd highest
Milford Sound 7.3 +1.6 1935 4th highest
Puysegur Point 10.2 +1.8 1978 2nd highest
Arthurs Pass 4.1 +1.5 1978 4th highest
Mt Cook 4.9 +1.8 1930 4th highest
Wanaka Airport 5.8 +2.0 1973 3rd equal highest
Queenstown Airport 5.6 +2.0 1969 2nd highest
Alexandra 5.7 +2.3 1927 4th highest
Clyde 5.3 +2.1 1947 3rd highest
Invercargill Airport 7.2 +1.6 1948 2nd highest


Near record high mean maximum daily air temperatures were recorded at:

Location Mean maximum air
temperature
(ºC) Departure
from
Normal Year
Records
began Comments
Haast 12.9 +1.5 1950 2nd equal highest
Milford Sound 11.1 +1.6 1935 Highest
Puysegur Point 12.3 +1.6 1978 Highest
Hanmer Forest 12.7 +2.5 1906 4th equal highest
Mt Cook 9.6 +2.3 1930 3rd equal highest
Tekapo 9.9 +3.0 1928 3rd highest
Fairlie 12.5 +2.1 1925 4th highest
Wanaka Airport 10.4 +1.9 1973 4th highest
Queenstown Airport 10.6 +2.6 1969 Highest
Alexandra 11.7 +3.7 1929 2nd highest
Clyde 10.9 +2.7 1947 2nd equal highest
Invercargill Airport 11.3 +1.6 1948 2nd highest

Near record high mean minimum daily air temperatures were recorded at:

Location Mean minimum air
temperature
(ºC) Departure
from
Normal Year
Records
began Comments
Dargaville 10.1 +2.3 1943 Highest
Puysegur Point 8.1 +2.0 1978 Highest
Wanaka Airport 1.1 +2.0 1973 4th highest

RAINFALL: BELOW NORMAL IN MARLBOROUGH AND OTAGO, ABOVE AVERAGE WAIKATO AND NORTH CANTERBURY

Rainfall was below normal in Nelson, Marlborough and Otago, with totals around 50% of normal for the month of June. In contrast, rainfall in North Canterbury, inland Manawatu, Waikato, and eastern Auckland was well above normal for the month, by between 140 and 160% of normal, and almost double (200%) of normal at Waiouru.

SUNSHINE: ABOVE AVERAGE HOURS OF BRIGHT SUNSHINE IN NORTH AND CENTRAL SOUTH ISLAND

June totals of bright sunshine were above average (at least 110 percent of normal) throughout much of the country. Sunshine totals were well above average (125 percent or more of normal)in Hawke’s Bay, Wairarapa, eastern Marlborough, Tekapo, Central Otago and Southland.

Near or record June sunshine hours were recorded at:
Location June
Sunshine (hours) Percentage
of normal Year
records began Comments
Tekapo 145 151 1928 5th highest


JUNE’S CLIMATE IN THE FIVE MAIN CENTRES

All the main centres were warmer than normal for June, with Auckland the warmest. There was a very strong north-to-south gradient in rainfall over the month, with Auckland and Hamilton receiving over 150 mm, while Dunedin was the driest of the main centres, receiving only 33 mm. Auckland and Christchurch received near normal sunshine for June, with the other three being above normal. Hamilton was the sunniest location.

June 2008 main centre climate statistics:

Location June
mean
temp.
(°C) Dep.
from normal
(°C) June
rainfall
(mm) % of
normal June
Sunshine
(hours) % of
normal
Auckland 12.6 1.0 Above average 162 a 116 Near normal 116 c 104 Near normal
Hamilton 9.8 0.6 Above average 161 137 Above normal 122d 118 Above normal
Wellington 10.4 0.9 Above average 136 93 Near
normal 118 120 Above normal
Christchurch b 6.8 0.6 Above average 89 143 Above
normal 114 96 Near normal
Dunedin 8.0 0.9 Above average 33 47 Well below normal 109 126 Above normal
a Owairaka b Christchurch Airport c Mangere d Ruakura

HIGHLIGHTS AND EXTREME EVENTS

 Temperature

The highest temperature during June 2008 was 23.1ºC recorded at Waipara West on the 15th, the highest June temperature on record at this location. This is only 0.9 ºC below the highest ever South Island June temperature of 24.0 recorded on 2 June 1976 at Kaikoura and Temuka.

Near record high extreme maximum daily air temperatures were recorded at:

Location Extreme maximum
temperature
(ºC) Year
Records
began Comments
Westport Airport 19.0 1937 Highest
Haast 19.0 1950 Highest
Milford Sound 16.6 1935 3rd highest
Appleby 20.7 1932 Highest
Blenheim Research Centre 21.3 1932 Highest
Blenheim Airport 20.5 1941 3rd highest
Tekapo 18.5 1928 Highest

The lowest air temperature during the month was -7.5ºC recorded at Hanmer Forest on June 8th .

 High winds and tornadoes

The highest wind gust for the month was 183 km/h at Hicks Bay on the 18th.

High winds affected flights into Queenstown on 7 June, and brought trees down in Central Otago. Westerlies and north westerlies gusted up to 110 km/h at Gore, 120 km/h at Kelburn and 170 km/h at Castlepoint.

A mini-tornado damaged properties in Papamoa near Tauranga on 22nd June in blustery northerlies, damaging the roofs of three homes in one street.

Strong cold southwesterlies gusted to 124 km/h at Awakino (Taranaki) and 100 km/h in Auckland on the 24th. Very blustery westerlies and southwesterlies produced gusts up to 147 km/h at Awakino on the 26th, 132 km/h at Manukau Heads and 133 km/h at Cape Reinga on the 27th.

Strong southerlies brought winds gusting as high as 148 km/h in the Wellington region on the 29th, causing 7 metre swells in Cook Strait, cancelling interisland ferries and regional flights in and out of Wellington Airport.

 Heavy rain and flooding

40 to 50 mm of rain in Wellington and the Hutt Valley up to 5 pm on the 29th produced some local flooding of roads, with slips closing Paekakariki Hill road.

 Snowfall

Snow fell from Southland to the Kaikoura coast on 7th June, with up to 20 cm lying in the Maniototo, snow flurries in Dunedin, and snow flakes in Christchurch closing the airport for a few hours. Porters Pass road closed.

Snow fell to 200 metres in Southland on 24th June, with snow and sleety conditions to low levels in the east of the South Island.

Snow closed roads around Ruapehu including the Desert Road on the 28th, after heavy snow fell on the Central Plateau.

 Thunder and lightning

Hail and thunder occurred from Wanganui to Auckland on the 24th, and blusterly southwesterlies on the 25th and 26th produced thunder, lightning and hail from Taranaki to Auckland. Lightning cut power to 4000 Waitara residents.

A flash lightning storm brought down trees, power lines and lifted roofs in south east Auckland on the morning of the 27th.

On the 28th, hail storms lashed Auckland.

ENDS

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