'obviously nonsense'? While I agree it's highly improbable, I wouldn't go so far as to say it's impossible.spwill wrote:Central Auckland having 1 thunder day in two years is obviously nonsense.
Least thunder days
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- Nev
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Re: Least thunder days
- NZstorm
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Re: Least thunder days
Do you have any ref for that? All I can find is this quote about Akld's climate from Te Ara (1966)…NZstorm wrote:Yes, a quiet year for thunder in Auckland would be about 8days. And active year would be 25days.
The Met Service weather stations in the old days when they were manned 24hrs, recorded an average of 13.3 days for the Auckland CBD and 13.2 out at the Airport.Thunder is heard about nine days a year.
There was one year in recent times I counted over 25 days in Grey Lynn for one year.
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Re: Least thunder days
Mind you,what qualifies as a 'thunder day' ,is a storm say 20k's away thats only just heard be classed as one?
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Re: Least thunder days
Yes, that would be a thunder day but I doubt there are those kinds of obs in the data.Richard wrote:Mind you,what qualifies as a 'thunder day' ,is a storm say 20k's away thats only just heard be classed as one?
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Re: Least thunder days
If there's a lot of wind and there's trees about or even in a city where there's a lot of noise you may not hear that distant thunder ...so ..a tricky one hey.NZstorm wrote:Yes, that would be a thunder day but I doubt there are those kinds of obs in the data.Richard wrote:Mind you,what qualifies as a 'thunder day' ,is a storm say 20k's away thats only just heard be classed as one?
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Re: Least thunder days
I think a thunderstorm should affect at least parts of a city or the whole city to be considered a recorded thunder day, not a storm in which skirts say 5-10km away from the city but within the actual region.
Canterbury, home of good rugby and severe storms
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Re: Least thunder days
Auckland is much larger than 20km.Richard wrote:Mind you,what qualifies as a 'thunder day' ,is a storm say 20k's away thats only just heard be classed as one?
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Re: Least thunder days
Yes, but the requirement is that thunder should actually be heard at the observational site, which under ideal listening conditions limits the area covered to a radius of no more than about 20 km.
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Re: Least thunder days
Some historical thunder day data.
Kaitaia 15.8 days
Auckland Airport 13.2
Rotorua Airport 13.3
Ngatea, Waikato 15.3
Cambridge,Waikato 16.7
Putaruru, Waikato 15.1
Ruakura, Waikato 11.1
Te Puke, Bay of Plenty 11.5
New Plymouth Airport 14.9
Gisborne 7.6
Napier 4.9
Ohakea 9.3
Levin 7.6
Paraparam 4.1
Wellington kelburn 4.6
Nelson Airport 6.0
Blenhiem 3.5
Kaikoura 3.3
Christchurch Airport 2.2
Rangiora 3.5
Ashburton 3.6
Timaru 2.8
Omarama 6.3
Hokitika 19.6
Hari Hari, Westland 15.9
Milford Sound 15.1
Kaitaia 15.8 days
Auckland Airport 13.2
Rotorua Airport 13.3
Ngatea, Waikato 15.3
Cambridge,Waikato 16.7
Putaruru, Waikato 15.1
Ruakura, Waikato 11.1
Te Puke, Bay of Plenty 11.5
New Plymouth Airport 14.9
Gisborne 7.6
Napier 4.9
Ohakea 9.3
Levin 7.6
Paraparam 4.1
Wellington kelburn 4.6
Nelson Airport 6.0
Blenhiem 3.5
Kaikoura 3.3
Christchurch Airport 2.2
Rangiora 3.5
Ashburton 3.6
Timaru 2.8
Omarama 6.3
Hokitika 19.6
Hari Hari, Westland 15.9
Milford Sound 15.1