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#122476 - 05/06/2007 11:04 Re: New Zealand Weather
RWood Offline
Member

Registered: 23/11/2006
Posts: 444
Loc: Wellington, NZ
May summary is on the NIWA website now:

http://www.niwascience.co.nz/ncc/cs/mclimsum_07_05

To nitpick Nev: W'gton sun total should be 148 (not 145), 1 less than Auckland. Ch'ch was further ahead.
The Hamilton AWS has persistently had a lower % of normal than Auckland since it was installed - time will tell whether the old means from the manual equipment were a little high, or alternatively the new site is a bit disadvantaged

rainwhereareyou???: In'gill's unusually high 122 hrs is mentioned. Will be interested to see what the AWS got.

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#122477 - 05/06/2007 16:42 Re: New Zealand Weather
rainfan Offline
Member

Registered: 07/09/2006
Posts: 1129
Loc: Bondi, Sydney
smile

In IVC's case - definitely the sunniest May since 1956 (123 hrs), also 5th consecutive sunnier than avge May with last 2 yrs exceeding 100 hrs.

Looks like the dry, warm & sunny weather has now given way to cold, showery SW weather (Im so envious of my brother - he'll be having a ball!).

To 9am today the monthly total (for IVC) stands at 30mm with 14.8mm falling in 24 hrs to 9am today.

IVC's forecast - certainly a lot more rain & bitterly cold temps to last for a few more days :-

Wednesday
Occasional showers with gale sou'westers.
Max 10oC & Min 6oC

Thursday
Showery with strong & cold sou'westers.
Max 9oC & Min 1oC

Friday
Sleety showers with gale sou'westers.
Max 7oC & Min 2oC

Saturday
Showers and strong, cold sou'westers easing
Max 6oC & Min 2oC

smile

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#122478 - 05/06/2007 16:53 Re: New Zealand Weather
rainfan Offline
Member

Registered: 07/09/2006
Posts: 1129
Loc: Bondi, Sydney
Re May 2007 summary for NZ (Main centres only) - am surprised that CHCH only recorded 160 hrs of sun considering NW - W winds prevailed with around 15 hours difference from AKL and WGT's sunshine totals. CHCH recorded the highest positive departure from average temps. WGT's rainfall was below avge but the wettest of all 5 main centres.

I havent yet constructed AKL's data for Sunshine, rainfall etc - will try and do it once I get some free time but that wont be likely for a while.

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#122479 - 05/06/2007 18:46 Re: New Zealand Weather
RWood Offline
Member

Registered: 23/11/2006
Posts: 444
Loc: Wellington, NZ
They had a few dull days near the start of the month I think - and NW can produce "arch" cloud in the lee of the Alps. Still, a good total.

What are you using as you base AKL data? Be aware that there are problems at various points in the sunshine records - I can give you details of what I consider to be anomalies in a later post.

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#122480 - 05/06/2007 19:35 Re: New Zealand Weather
Nev Offline
Weather Freak

Registered: 21/10/2006
Posts: 612
Loc: Waiheke Island, Auckland, NZ
Quote:
Originally posted by RWood:
...To nitpick Nev: W'gton sun total should be 148 (not 145), 1 less than Auckland...
Hmm, could you elaborate, as the '145 hrs' for Wgtn seems to match the last daily May total published in the NZ Herald, so can't just be a typo?

I wonder why there's no mention this month of May's 2 reported tornado events frown

Auckland's driest May ever recorded - wow! shocked

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#122481 - 05/06/2007 19:44 Re: New Zealand Weather
RWood Offline
Member

Registered: 23/11/2006
Posts: 444
Loc: Wellington, NZ
145 was the total to the 30th. 31st had 3.0 hrs - the Herald's total to 31st should have appeared on the 2nd. The printed version (Climate Digest) will have the right total. A similar mistake occurred in the online report last November.

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#122482 - 05/06/2007 21:01 Re: New Zealand Weather
rainfan Offline
Member

Registered: 07/09/2006
Posts: 1129
Loc: Bondi, Sydney
Quote:
Originally posted by RWood:

What are you using as you base AKL data? Be aware that there are problems at various points in the sunshine records - I can give you details of what I consider to be anomalies in a later post. [/QB]
eek just had a quick glance at AKL's data - quite a lot of different sites.

Sunshine - Albert Park 1909 - 1955
Mechanics Bay 1950 - 1962
Auckland City 1962 - 1990
Mangere 1995 - 1998
Whenuapai Aero 1995 - 2000

Rainfall - Albert Park 1853 - 1994
Auckland City EDR - 1995
Owairaka - 1995 - 2000
Mangere - 1995 - 1998

Certainly not one of the best in reliability of sites/long term records (Apart from Albert Park rainfall data).

If you could give me all sites/exact dates they opened/closed - that would be great. Thanks.

:cheers:

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#122483 - 05/06/2007 21:36 Re: New Zealand Weather
Nev Offline
Weather Freak

Registered: 21/10/2006
Posts: 612
Loc: Waiheke Island, Auckland, NZ
Ah yes, you're right RWood - the Herald did show 3.0 hrs for Wgtn on the 31st, but the accompanying total (as with several other towns) had been zeroed.

However, by the same token, the Herald also reported 7.5 hrs for Auckland on the 31st alongside a total of 156.6 hrs (149.1 + 7.5 = 156.6).

And for Christchurch, 0.4 hrs was reported on the 31st which would have brought the Herald's zeroed total to 160.5 hrs.

Go figure? confused

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#122484 - 06/06/2007 06:46 Re: New Zealand Weather
RWood Offline
Member

Registered: 23/11/2006
Posts: 444
Loc: Wellington, NZ
Not profound programming to get this sort of thing right! A longstanding frustration for me has been the absolute refusal or inability of Wellington newspaper(s) throughout its/their whole history to admit that there are 2 days in a weekend - at no time have they printed data or accumulated totals for both days. mad Many other papers have managed this trick! Most of the reports are customised for them by MetService now, so they could easily request that it be done.

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#122485 - 06/06/2007 06:50 Re: New Zealand Weather
rainfan Offline
Member

Registered: 07/09/2006
Posts: 1129
Loc: Bondi, Sydney
Report from todays Southland Times (Invercargill) - gales / heavy showers causing havoc on the coast.

For a picture - click on the link below : -

http://www.stuff.co.nz/southlandtimes/4084868a6011.html

Wednesday, 6 June 2007

Strong winds began to make their presence felt in the south yesterday, with MetService meteorologists predicting conditions will only get worse.

An errant trampoline led to Bluff's fire brigade being called out to a McGorlick St house after wind picked it up and dropped it on the roof of a neighbouring house.

Bluff chief fire officer Bill Gold said winds reached gale force in the port town yesterday and prompted a second fire call 11 minutes after the first when power lines were damaged by wind at the intersection of Elizabeth and Henderson streets.

The MetService issued a severe weather warning for strong winds over eastern parts of Southland and Otago yesterday, with gusts of about 110kmh forecast in exposed places between the Catlins and the Rock and Pillar range.

The southerly blasts come after an unusually warm May nationwide and herald a hurried arrival of winter. While the mercury at Invercargill Airport reached a high of 11degC yesterday, the wind-chill factor stripped that temperature back, making it feel like 3degC outdoors, MetService data said.

MetService weather ambassador Bob McDavitt said the weather had entered a windy phase this week.

"Strong and sustained winds will peak during the passage of each cold front."

South-west gales were expected to intensify today in Southland and eastern Otago, he said.

There was little improvement forecast for tomorrow, with cold snowy south-westerly winds forecast to reach the South Island.

The strong winds and dropping temperatures would bring an increasing risk of exposure to livestock, Mr McDavitt said.

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#122486 - 06/06/2007 07:25 Re: New Zealand Weather
RWood Offline
Member

Registered: 23/11/2006
Posts: 444
Loc: Wellington, NZ
Quote:
Originally posted by rain where are you???:
Quote:
Originally posted by RWood:

What are you using as you base AKL data? Be aware that there are problems at various points in the sunshine records - I can give you details of what I consider to be anomalies in a later post.
eek just had a quick glance at AKL's data - quite a lot of different sites.

Sunshine - Albert Park 1909 - 1955
Mechanics Bay 1950 - 1962
Auckland City 1962 - 1990
Mangere 1995 - 1998
Whenuapai Aero 1995 - 2000

Rainfall - Albert Park 1853 - 1994
Auckland City EDR - 1995
Owairaka - 1995 - 2000
Mangere - 1995 - 1998

Certainly not one of the best in reliability of sites/long term records (Apart from Albert Park rainfall data).

If you could give me all sites/exact dates they opened/closed - that would be great. Thanks.

:cheers: [/QB]
Rainfall dates look right, though I can't verify them offhand. There was a site at Henderson (Oratia) which had reliable records for quite a long period, shown in the 1951-80 and earlier period averages.

Sunshine sites: The dates are OK (except see Mangere, Whenuapai below).It's documented that Albert Park values were affected by growing trees in later years. Also, records earlier than about 1933 look a bit dodgy. For my purposes I consider the comparisons with other sites only look satisfactory for the years 1933-1947 inclusive. The "purple patch" for Auckland sunshine seems to been the period about 1938-1945. The common records for A.P. and Mechanics Bay for 1950-1955 show a large difference.

In 1956 at Mechanics Bay Auckland recorded 2026, despite record rainfall, and compared favourably with Tauranga (2021) and Napier (2026) - both the latter having their cloudiest year on record to that date. Only Foxton (2044) had more sunshine amongst the North Island locations (the SW of the island wasn't as much affected as the north, centre and east in a bizarre year).

Auckland City 1962-1990: Again, obstructions near the recorder affected the last few years of records. Intercomparisons with Auckland Aero (1969-1989) are okay up to 1985, then show a marked change 1986-1990.

Records I have cover Mangere for 1964-1998 (new EWS opened in 2002; there may have been minor site changes in the old record, not sure about that). I have only seen Whenuapai's "new" data for 1998-2000, not 1995-2000. These records do not look good at all and I believe there was (as for AP) a "growing obstruction" issue. There are some older records for 1954-1969 which indicate a slightly lower average than Mechanics Bay by 50-75 hrs or thereabouts.

BTW, I don't want to get in to a direct or indirect argument with NIWA about any of this stuff - the people who did analyses of the older records and prepared the "normals" publications for 1941-70 and earlier aren't around anymore, and even in the 1951-80 case that may be true. I've drawn on a lot of sources - printed (mostly)and verbal - to reach my conclusions and am confident of them.

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#122487 - 06/06/2007 12:55 Re: New Zealand Weather
Nev Offline
Weather Freak

Registered: 21/10/2006
Posts: 612
Loc: Waiheke Island, Auckland, NZ
Few more showers with fine breaks here in Auckland - overall not a bad day wink .

Snow (and blizzards) down to 100m in the Deep South by tomorrow evening, with 20-25cm above 400 metres from 6am Thursday to 6am Friday. Here's this morning's Weather Advisory...
Quote:
SPECIAL WEATHER ADVISORY FOR FIORDLAND SOUTHLAND OTAGO
ISSUED BY METSERVICE AT 10:24am Wednesday 06-Jun-2007

VERY COLD SNOWY WEATHER COMING ON THURSDAY TO SOUTHERN SOUTH ISLAND AREAS, AND CONTINUING THROUGH FRIDAY AND MUCH OF SATURDAY.

A cold front is expected to cross southern South Island areas early Thursday morning followed by cold showery southwesterlies.
The southwesterlies are expected to become progressively colder during Thursday.
Snowfalls are likely down to about 300 metres during the morning and lowering to 100 metres in the evening. The heaviest snowfalls are likely to be over Fiordland, inland Southland and South Otago with lesser amounts reaching the Otago Lakes, Central Otago and Dunedin hills.
Snowfalls are likely to acccompanied by strong or gale force winds creating blizzard conditions in some inland areas of Southland and Otago.
Further snowfalls to low levels are likely to continue off and on through Friday and much of Saturday.

Bitterly cold conditions are likely to cause stress to animals. People in these areas are advised to consider moving stock to sheltered locations.

Road conditions are likely to become hazardous in many inland areas late on Thursday. Motorists are advised to consider carrying food and warm clothing, and to perhaps deferring journeys, especially during Thursday night.

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#122488 - 07/06/2007 16:56 Re: New Zealand Weather
rainfan Offline
Member

Registered: 07/09/2006
Posts: 1129
Loc: Bondi, Sydney

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#122489 - 07/06/2007 17:23 Re: New Zealand Weather
RWood Offline
Member

Registered: 23/11/2006
Posts: 444
Loc: Wellington, NZ
No probs. I trust the BOM weather warning out now and recent events have changed your "handle"... wink

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#122490 - 07/06/2007 18:25 Re: New Zealand Weather
NZAAS Offline
Member

Registered: 27/05/2003
Posts: 1086
Loc: Rain mentioned every forecast....
The last week it has been a westerly flow mainly with showers in the north and west and south coast(SI).Here its been mostly moderate to fresh winds but were gusty this afternoon with fine periods interspersed with showers.Tonight its turned ugly as it goes more SW.Mins been from 11 to 13 and max about 17 or 18
Wellington has been fine as usual with gusty NW and maximums about the same.
Christchurch mostly ENE and fine but has had westerlies at times flucating the temperatures.Todays 3pm was 11
South of Dunedin theres been snow with hail in Invercargill,They got 5 at 3pm with a gale W

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#122491 - 08/06/2007 07:30 Re: New Zealand Weather
Nev Offline
Weather Freak

Registered: 21/10/2006
Posts: 612
Loc: Waiheke Island, Auckland, NZ
Severe Gale Winds of 85 km/h gusting to around 100 km/h were recorded in Invercargill city on Thursday morning and winds that were beginning to abate yesterday evening were likely to rise to gale force again today, with gusts to 130 km/h expected in coastal areas.

Invercargill's daytime temp only was only 5C (6C in Dunedin). MetService's wind chill factor swung between minus 5C and minus 2C during the mornings polar blast.

Snow began falling in Gore at 9am yesterday. A smattering of snowflakes fell in central Invercargill about 6pm, while northern suburbs had heavier falls that settled up to 6cm in places on last night.

The Southland front passed over Christchurch from about 2:30am to 5am this morning, bringing Fresh to Strong S'erlys gusting to 67km/h and is expected to head north, followed by 3 weather fronts bringing more wind and snow over the coming days.

W'erly winds are moving across the North Island today with severe gales expected in Hawke's Bay and Wairarapa.

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#122492 - 08/06/2007 09:17 Re: New Zealand Weather
RWood Offline
Member

Registered: 23/11/2006
Posts: 444
Loc: Wellington, NZ
Another clear day here, 3rd in succession, this pm willing of course.

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#122493 - 08/06/2007 11:49 Re: New Zealand Weather
Nev Offline
Weather Freak

Registered: 21/10/2006
Posts: 612
Loc: Waiheke Island, Auckland, NZ
Yes, sounds like Wellington's getting most of the sunshine lately. laugh

A little breezy here on Waiheke today, cloud with fine breaks and around 16C.
Auckland aero reported a Strong to Near Gale WSW'er gusting to at least 63km/h around mid morning.

The hills are apparently "thick" with snow and sleet in Gore (central Southland).
Snow is expected down to sea level in Dunedin this evening...

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#122494 - 08/06/2007 14:00 Re: New Zealand Weather
RWood Offline
Member

Registered: 23/11/2006
Posts: 444
Loc: Wellington, NZ
Cooler air around now with a little mid-level cloud moving overhead fairly quickly, probably has swung SSW. Then should be back to mainly NNW/W/WSW with generally fine conditions.

All expected to turn unpleasant about Monday as the Aussie system spreads rain down from the north - perhaps a chance for some rain for Hawkes Bay.

Notwithstanding a good storm last July, the big wet SE systems that deliver a good dollop of rain here have been very uncommon since the early to middle 80s - they were much more common in earlier times. Instead the much drier and more shortlived SSW/S variety have occurred more often, along with pure SW flows that give dry conditions.
This is the less colloquial version of a comment in a "nostalgia" article where some character was wondering where "the southerlies" of the 70s had gone.

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#122495 - 08/06/2007 16:05 Re: New Zealand Weather
pete28 Offline
Weatherzone Addict

Registered: 08/01/2007
Posts: 1114
Loc: Christchurch, New Zealand
Hey does anyone know where I can find the extreme weather records for NZ cities? Like the all-time lowest maximum for Christchurch etc?

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