Re: General November Weather
Posted: Mon 01/12/2014 17:33
October and November tend to be the worst performing months of the year for Auckland due to the southwesterlies.
I heard you guys were doing it tough Richy and I remember a few cold springs in the 70s/80s down that way when I was there.Generally just a much crappier November here, wetter and colder than usual. And this is Dunedin we're talking about haha.
The Greymouth sun "surplus" would be due to using the new EWS values against old means for the manual site. It records about 300 years per annum more than the still open manual site, and I guarantee the latter will report a deficit for November. The same applies for Hokitika EWS.Nev wrote:A very stormy and cool November. Very dry in eastern areas, while very wet in western areas. Above average sunshine for most areas, but well below in others.
Some very preliminary November 2014 temp and rainfall figures for the main centres:
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Nov 2014 Average Temps, Rainfall and departures from their 1981-2010 normals ℅ NIWA Site T-max °C T-min °C T-mean °C Rainfall mm Auckland, Mangere 19.5 +0.1 12.5 -0.3 16.0 -0.1 47 72% Auckland Aero 19.0 -0.5 12.1 -0.7 15.5 -0.7 59 82% Tauranga Aero 20.5 +0.4 11.0 -0.7 15.8 -0.1 35 47% Hamilton Aero 18.5 -1.4 8.6 -0.9 13.5 -1.2 82 92% Hamilton, Ruakura 19.2 -0.7 9.3 -0.6 14.2 -0.7 85 102% Wellington, Kelburn 16.8 +0.3 10.3 0.0 13.6 +0.2 51 52% Christchurch Aero 20.0 +1.1 7.0 -1.0 13.5 0.0 48 103% Dunedin, Musselburgh 15.6 -0.5 7.3 -1.3 11.5 -0.9 74 131%
Note that Greymouth Aero recorded 294mm for Nov (149% of normal), although sunshine was slightly above normal, if not considerably cooler. In contrast, places like Nelson Aero only recorded 12mm and both Napier Aero and Gisborne Aero only managed 17mm.
Invercargill will show worse ....RichyDunedin wrote:Generally just a much crappier November here, wetter and colder than usual. And this is Dunedin we're talking about haha.
Definitely been a wet month but still plenty of growth with the heat in the sun....when it does shine.RWood wrote:Invercargill will show worse ....RichyDunedin wrote:Generally just a much crappier November here, wetter and colder than usual. And this is Dunedin we're talking about haha.
The 1981-2010 averages for NZ locations span a period when conversions to electronic measurement make it tricky to assess. For both Invercargill (manual) and Dunedin (mixed) the value quoted is 1680 hours. However I regard the In'gill manual records post the early 1990s as somewhat doubtful (too high) when compared to older records - an EWS installed there records lower values than the manual equipment, which is definitely not normal. On the other hand, the later records at Dunedin (manual period) look too low.RichyDunedin wrote:I've got distant memories of what the sun looks like. Moving from Cairns to Dunedin is hardly an ideal change of climate haha.
Where in mainland NZ has the lowest sunshine hours? I'm thinking somewhere in Southland or Fiordland? I see the Auckland Islands get over 300 days of rain and less than 700 sunshine hours. Brutal, probably blowing a gale then too.
the regular showers of rain and not any hot weather periods has meant lots of grass growth in this areastill plenty of growth
Stats for October out now.RWood wrote:November summary due on NIWA website - but the October summary doesn't have the stats link yet!
You're a wealth of knowledge RWood, good stuff! Yea certainly a delayed wet up in FNQ. Hopefully be a decent summer.RWood wrote:The 1981-2010 averages for NZ locations span a period when conversions to electronic measurement make it tricky to assess. For both Invercargill (manual) and Dunedin (mixed) the value quoted is 1680 hours. However I regard the In'gill manual records post the early 1990s as somewhat doubtful (too high) when compared to older records - an EWS installed there records lower values than the manual equipment, which is definitely not normal. On the other hand, the later records at Dunedin (manual period) look too low.RichyDunedin wrote:I've got distant memories of what the sun looks like. Moving from Cairns to Dunedin is hardly an ideal change of climate haha.
Where in mainland NZ has the lowest sunshine hours? I'm thinking somewhere in Southland or Fiordland? I see the Auckland Islands get over 300 days of rain and less than 700 sunshine hours. Brutal, probably blowing a gale then too.
For older periods prior to 1990 Dunedin was definitely ahead of Invercargill. Readings for mountainous and rainforest areas are not generally available.
Cairns has been very dry this spring and has had large sun surpluses in all 3 months.
Campbell Island averaged only 640 hours in a record spanning over 50 years, once getting as little as 479 hours in a year (1992).
It might be that case that the 11SS (as opposed to the 7SS) would show a larger deficit - but I think a couple of the 11SS sites are offshore! In this particular month the areas with the biggest deficits would not be well represented in the 7SS, either.tich wrote:I thought that November would've been more than the 0.3C below normal nationally, especially since NIWA stressed that it was a cool month.
Agree that the 11 station series (Raoul Is. and Campbell Is. notwithstanding) might better represent the country as a whole.RWood wrote:It might be that case that the 11SS (as opposed to the 7SS) would show a larger deficit - but I think a couple of the 11SS sites are offshore! In this particular month the areas with the biggest deficits would not be well represented in the 7SS, either.tich wrote:I thought that November would've been more than the 0.3C below normal nationally, especially since NIWA stressed that it was a cool month.
I presume the Masterton CWS is a successor of instruments located in the same area, or very close to it (Waingawa had a long record).Nev wrote:Agree that the 11 station series (Raoul Is. and Campbell Is. notwithstanding) might better represent the country as a whole.RWood wrote:
It might be that case that the 11SS (as opposed to the 7SS) would show a larger deficit - but I think a couple of the 11SS sites are offshore! In this particular month the areas with the biggest deficits would not be well represented in the 7SS, either.
However, re the 7 station series, NIWA's Masterton CWS (Compact Weather Station) T-mean of 14.9C (or 1.3C above its 1971-2000 normal) looks a little suspect compared to Masterton Aero's T-mean of just 13.6C.
Interestingly, Jim Hickey said last night that 'the month overall was about 1 degree cooler than normal', which might be closer to the mark?
Hmm… it would appear NIWA use Martinborough as their current 'Masterton' site in their 7 station series.RWood wrote:I presume the Masterton CWS is a successor of instruments located in the same area, or very close to it (Waingawa had a long record).Nev wrote:... re the 7 station series, NIWA's Masterton CWS (Compact Weather Station) T-mean of 14.9C (or 1.3C above its 1971-2000 normal) looks a little suspect compared to Masterton Aero's T-mean of just 13.6C.