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Author Topic: NZ weather summary September 1969  (Read 545 times)

Offline Rwood

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NZ weather summary September 1969
« on: September 22, 2018, 05:56:01 PM »
September 1969:  September was marked by an exceptionally high frequency of northerly winds. It was unusually warm and also rather cloudy, with excessive rain on the West Coast. Over most of the country conditions were very favourable for farming. However, in eastern districts of both islands more rain was needed, particularly in the drought-stricken areas of South Canterbury and North Otago. No fewer than 9 small tornadoes caused some damage in parts of Northland, Auckland, Coromandel and Bay of Plenty on the 13th, 15th and 16th.

Rainfall: Rainfall was above average north of a line through Egmont, Ruapehu and Lake Waikaremoana. It was also above average in the South Island, except for the Canterbury Plains and coast and parts of Otago and Southland.  It was 2-4 times the average value in Bay of Plenty and Nelson and parts of Marlborough. A similar excess was recorded in Buller, Westland and the Alps, with many totals of over 30”, including 34.24” at Otira, 48.41” at Fox Glacier and 51.18” at Paringa. The highest monthly total was 65.69” at Downertown, an opencast mine northeast of Westport at an altitude of 2600ft. Of this, 44.72” fell in the 5 days 4-8 September, and 63.15” in the 15 days 3-17 September. Extensive slips blocked many roads on the 8th, especially the passes over the Alps. [Rapid Creek in the Hokitika catchment later reported a total of 79.09”, a NZ record until the late 1980s, after the Cropp stations opened].

Over the remainder of the country rainfall was below average. It was less than half the average value in Taihape and Wairarapa with parts of Manawatu and Hawkes Bay; also in North Canterbury and parts of central Canterbury. Over most of North Canterbury it was less than 1/4 of the average value.

Temperatures:
Temperatures were 1F-5F warmer than average. Highest departures of 3F-5F were recorded from South Taranaki and Taihape to Wellington and Wairarapa; also in Marlborough and Canterbury with parts of Otago and Southland. In parts of these areas, notably in Wellington and Christchurch, it was by far the warmest September in 60-100 years of observation [Wellington record broken in 1996; Ch’ch needs to be checked].

Sunshine: Sunshine was below average by 30-70 hours over the greater part of the country, Hokitika receiving only 98 hours. However, it was about average over most of Southland, Otago and inland Canterbury; also in the North Island east of the main ranges, in the Taihape-Wanganui area, and in parts of Waikato, Bay of Plenty, and Northland.

[Some totals:  Kaitaia 169, Kerikeri 141, Whangarei 138, Auckland 143, Tauranga 181, Whakatane 184, Taupo 129, Opotiki 163, Hamilton 160, New Plymouth 148, Masterton 146, Gisborne 186, Napier 188, Wairoa 189, Paraparaumu 132, Ohakea 156, Palmerston North 126, Levin 123, Wellington 126, Stratford 110, Ohakune 141, Wanganui 157, Takaka 133, Westport 94, Hokitika 98, Greymouth 90, Haast 96, Riwaka 128, Nelson 139, Blenheim 156, Grassmere 151, Kaikoura 165, Mt Cook 99, Mt John 175, Methven 150, Christchurch 131, Tekapo 179, Timaru 123, Waimate 124, Omarama 161, Palmerston 118, Dunedin Aero 134, Dunedin 122, Oamaru 135, Queenstown 149, Alexandra 152, Invercargill 135, Campbell Is 66, Chatham Is 121]

Sources: NZ Met. Misc. pub. 107 (Climatological table, NZ Gazette) and NZ Met. Misc. pub. 109 (Meteorological Observations) - additional comments by the poster.



Offline Rwood

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Re: NZ weather summary September 1969
« Reply #1 on: September 22, 2018, 06:01:27 PM »
Noteworthy rainfalls on the West Coast, and extended dryness for some.

Offline ato2

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Re: NZ weather summary September 1969
« Reply #2 on: September 24, 2018, 06:41:27 PM »
Certainly some impressive totals of rainfall. I was contrasting it with this September, 2018 (locally- New Plymouth-) which is relatively dry, so far.
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Offline Rwood

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Re: NZ weather summary September 1969
« Reply #3 on: September 25, 2018, 07:50:20 AM »
Noteworthy rainfalls on the West Coast, and extended dryness for some.
Certainly some impressive totals of rainfall. I was contrasting it with this September, 2018 (locally- New Plymouth-) which is relatively dry, so far.
[/quote]

From the daily maps, there is a large area in the west and north of the SI and a SW-NE swathe of the NI that is pretty dry so far this month ...


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