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Re: General December Weather
Posted: Sat 24/12/2022 14:34
by Meangreen
Thunderstorm coming down the Wairau Valley towards Blenheim. Have heard a number of rumbles from it over the last half an hour.
Re: General December Weather
Posted: Sat 24/12/2022 22:46
by NZ Thunderstorm Soc
Muggy day here in Lower Hutt with some interesting cloud forms towards the Remutakas this afternoon,
Re: General December Weather
Posted: Sun 25/12/2022 08:31
by Storm Struck
Meri kirihimete to everyone today, eat plenty and observe the bubbling clouds
.
There is one difference today compared to the last few days in that not only is there convergence but also a small upper trough is crossing from the west.
Back in November this is what brought more scattered thunderstorms across the plains and coast, just that extra omph to move them abit.
So I wouldn't be surprised if there were a few rumbles this afternoon.
Re: General December Weather
Posted: Sun 25/12/2022 14:14
by David
Merry Christmas all! A fairly nice day here, partly cloudy with 26C
Re: General December Weather
Posted: Sun 25/12/2022 19:04
by midgrove
Multiple lightning strikes in Marlborough with heavy showers on the radar, anvil outflow clearly visible from Blenheim
Re: General December Weather
Posted: Sun 25/12/2022 20:51
by Richard
Sun has not set and the grass has dew already, its 20deg atm with 60%, yet
https://bmcnoldy.rsmas.miami.edu/Humidity.html say the dew point is 8.3, how does work
Re: General December Weather
Posted: Sun 25/12/2022 21:58
by NZ Thunderstorm Soc
Similar weather to yesterday but much weaker Cu forms.
Re: General December Weather
Posted: Mon 26/12/2022 23:14
by NZ Thunderstorm Soc
Fine and warm day in the Lower Hutt region and into he mid 20's
Re: General December Weather
Posted: Tue 27/12/2022 07:10
by Nev
Those figures look to be based on Fahrenheit, in which case you'd be talking extreme frost rather than dew...
So 20.0°C at 60% RH should give you a DP of 12.0°C (or closer to 12.6°C going by NIWA's data at that time).
Still seems a little odd to have dew on the grass with those temps though?
Maybe there was some residual ground moisture coming to the surface with some evaporative cooling taking place?
P.S. Below is my favourite calculator site, which also gives you absolute humidity in terms of grams of water moisture per cubic metre of air. It also has a nice little explanation about humidity and dew points.
https://www.calculator.net/dew-point-calculator.html
Re: General December Weather
Posted: Tue 27/12/2022 09:48
by Razor
Some very welcome rain here in Christchurch. Garden is bone dry, needs a good drink
Re: General December Weather
Posted: Tue 27/12/2022 19:10
by David
A little residual instability here this afternoon, had 2 minutes of fat raindrops around 5.45 from a buildup
Re: General December Weather
Posted: Tue 27/12/2022 20:32
by dogmelon
We're back into a stable period with no boil-ups. When is the next period?
Re: General December Weather
Posted: Tue 27/12/2022 23:07
by NZ Thunderstorm Soc
Looks like a stable end of the year with main;y settled weather for the rest of the week.
Fine and sunny up in the Kapiti/Horowhenua region today.
Re: General December Weather
Posted: Wed 28/12/2022 19:10
by Richard
Lovely stable day with some broken cloud which totally cleared off late afternoon, 23.5 deg the high, higher tomorrow.
Re: General December Weather
Posted: Wed 28/12/2022 20:59
by spwill
It is turning into a sunny December here after a cloudy first two weeks to the month.
Re: General December Weather
Posted: Thu 29/12/2022 15:00
by cbm
Check out the water temp description at Bowentown.
Sent from my SM-S908E using Tapatalk
Re: General December Weather
Posted: Thu 29/12/2022 18:26
by Orion
Warm today, 32°C and around 33% humidity at my place. Tar melting on the streets.
Re: General December Weather
Posted: Thu 29/12/2022 22:38
by NZ Thunderstorm Soc
Warm day up in the Wairarapa where we were today. Noticed tar melting on the street in Ekatahuna today.
Re: General December Weather
Posted: Fri 30/12/2022 23:07
by NZ Thunderstorm Soc
Not as warm as yesterday up here in the Belmont Hills. The clagg moved in later this afternoon and evening with colder southerlies.
From about 30C yesterday it was about 16C for much of the day after the clagg rolled through.
I countered about 16 spit of drizzle at various times.
Re: General December Weather
Posted: Sat 31/12/2022 12:04
by David
Quite a sudden arrival of the ENE/NE breeze here early this morning, temperature rose from 16C at 3am to 20.5C by dawn.
Re: General December Weather
Posted: Sat 31/12/2022 23:17
by NZ Thunderstorm Soc
Fine day here in Lower Hutt but with a cool wind from off the Port Nickelodeon harbour.
Re: General December Weather
Posted: Sun 01/01/2023 15:38
by David
December 2022 summary for Howick:
Mean temp: 19.2C (+0.5C)
Mean daily high: 23.8C (+0.6C)
Mean daily low: 15.3C (+0.5C)
Lowest temp: 10.4C (on day 6)
Highest temp: 26.6C (on day 28)
Total rainfall: 85mm (pretty much bang on average)
Re: General December Weather
Posted: Sun 01/01/2023 18:04
by Richard
Dec for Medbury
Rainfall 61.4mm
Max temp 28.4deg, 29th
Min temp 5.7 deg, 8th and 5th
Lowest max temp 11.5 deg, 2nd
Highest min 14 deg 27th
Thunder heard on 4 days
Re: General December Weather
Posted: Mon 02/01/2023 07:20
by Nev
Despite a relatively cool start, December 2022 ended up being exceptionally warm overall, rounding off what is more than likely to be NZ's warmest year on record for the second consecutive year. There was, however, a notable difference between near-record warm Dec temps for parts of the West Coast and slightly below normal Dec temps for parts of north Canterbury and Marlborough.
Dec 2022 Climate Anomaly Maps ℅ NIWA.png
Preliminary stats for the main centres:
Code: Select all
Dec 2022 Average Temps, Rainfall, Sunshine and departures from 1981-2010 normals ℅ NIWA
Site T-max °C T-min °C T-mean °C Rain mm Sun hrs
Auckland, Mangere 23.3 +1.7 16.1 +1.3 19.7 +1.5 97 113% 234 118%
Tauranga Aero 22.8 +0.6 15.7 +1.8 19.2 +1.2 137 145%
Hamilton Aero * 23.7 +1.5 13.6 +2.0 18.6 +1.7 104 99% 233 112%
Wellington, Kelburn 19.9 +1.3 13.5 +1.2 16.7 +1.3 100 120% 218 98%
Christchurch Aero 20.5 -0.5 11.8 +1.3 16.2 +0.4 63 135% 223 101%
Dunedin, Musselburgh 17.9 +0.6 11.4 +1.0 14.7 +0.9 30 37% 188 112%
Greymouth Aero 21.1 +2.9 12.9 +1.7 17.0 +2.3 93 37% 263 158%
* Sunshine from Ruakura
Re: General December Weather
Posted: Sun 08/01/2023 22:16
by NZ Thunderstorm Soc
December's Weather from Raukapuka, Geraldine.
Rainfall 105.6mm over 21 days
Max temp 32.3C deg, Thursday the 29th
Min temp 7.5C deg, Thursday the First
Lowest max temp 14.4C deg, Sunday the 18th
Highest min temp 15.3C deg, Tuesday the 27th
Thunder heard on 4 days
Rainfall total for the year was 1011.9mm over 170 days.