General January Weather

GreggWard · Unread post by **GreggWard** » Sun 14/01/2018 17:56

Thunder081 wrote: Sun 14/01/2018 17:52 Got more showers bubbling up near Palmerston North today and this one caught my eye

Nice photo Thunder081, that looks like the cell that was making the rumbling.

Thunder081 · Unread post by **Thunder081** » Sun 14/01/2018 18:03

GreggWard wrote: Sun 14/01/2018 17:56
Thunder081 wrote: Sun 14/01/2018 17:52 Got more showers bubbling up near Palmerston North today and this one caught my eye
Nice photo Thunder081, that looks like the cell that was making the rumbling.

Yeah it is, it was taken at 5:46pm from Levin

NZstorm · Unread post by **NZstorm** » Sun 14/01/2018 18:09

Saw a very brief cb pop up over Western Waikato this afternoon and then fizzle quickly.

Great photos from yesterday Greg. The first photo resembles a wall cloud but it won't be as the upper winds were too weak.

Thunder081 · Unread post by **Thunder081** » Sun 14/01/2018 18:16

The anvil from that thunderstorm has spread out a lot too

DSCF6671-r.jpg

GreggWard · Unread post by **GreggWard** » Sun 14/01/2018 18:17

NZstorm wrote: Sun 14/01/2018 18:09 Great photos from yesterday Greg. The first photo resembles a wall cloud but it won't be as the upper winds were too weak.

Thanks NZstorm, I was wondering what that cloud formation could have been.

Flutterbye · Unread post by **Flutterbye** » Sun 14/01/2018 19:27

NZ Thunderstorm Soc wrote: Sun 14/01/2018 17:34 They will all be melting down there
Sales of Deep South icecream will be sawing

Felt it no more than any other place that has similar temps - read enough of the 'I'm melting' from Cantabrians on social media.

Of course, it was warmer away from the airport!

mattyj46 · Unread post by **mattyj46** » Sun 14/01/2018 20:12

Unsure what weather station the Invercargill City Council use (or where exactly within the ICC building it is) but it registered 33.1C.

Simon Culling · Unread post by **Simon Culling** » Mon 15/01/2018 00:30

Tweet by MetService gives the days high as 33.1*C at Millers Flat in Otago. Max for Invercargill Airport given as 32.3*C.

https://twitter.com/MetService/status/9 ... 9739188224

Will it be as warm again on Monday?

Nev · Unread post by **Nev** » Mon 15/01/2018 06:56

mattyj46 wrote: Sun 14/01/2018 20:12 Unsure what weather station the Invercargill City Council use (or where exactly within the ICC building it is) but it registered 33.1C.

THe Invercargill City Council WS is a Davis Vantage Vue mounted on the roof of their 5-6 story building in Esk St. So not exactly an 'official' WS, particularly as its temps can be up to 6C higher than the airport just a few kms away.

David · Unread post by **David** » Mon 15/01/2018 09:28

The third night in a row with 20C minimum here. Looking similar the next 3 nights as well. Hoping for some decent rain from the incoming system this week as it's been 10 days since the last lot.

Flutterbye · Unread post by **Flutterbye** » Mon 15/01/2018 10:01

Nev wrote: Mon 15/01/2018 06:56
mattyj46 wrote: Sun 14/01/2018 20:12 Unsure what weather station the Invercargill City Council use (or where exactly within the ICC building it is) but it registered 33.1C.
THe Invercargill City Council WS is a Davis Vantage Vue mounted on the roof of their 5-6 story building in Esk St. So not exactly an 'official' WS, particularly as its temps can be up to 6C higher than the airport just a few kms away.

6 degrees higher? When it was showing through the 'Your Weather' on Metservice, the difference from the airport temp was 1 - 2 degrees, much like a lot of private stations...

Cyclone Tracy · Unread post by **Cyclone Tracy** » Mon 15/01/2018 10:07

That Tasman cut off low is making mince meat of the models at the moment. They have no idea on it's track and movement after 48 hours. EC's last run compared to the one before moved the centre of the low over 1000 km north west at only 96 hours out

TonyT · Unread post by **TonyT** » Mon 15/01/2018 10:33

Cyclone Tracy wrote: Mon 15/01/2018 10:07 That Tasman cut off low is making mince meat of the models at the moment. They have no idea on it's track and movement after 48 hours. EC's last run compared to the one before moved the centre of the low over 1000 km north west at only 96 hours out

The depression is contrary, in the wrong phase of the MJO (currently in 3, which does not favour depressions in the Tasman), so the models will have a harder time with this one as the wider scale environment is not supportive. Thats probably why the depression is forecast to weaken in-situ later in the week, but there's definitely some internal conflicts in the models with this one.

spwill · Unread post by **spwill** » Mon 15/01/2018 11:48

Looking like a slow moving front Thursday, we do need follow up rain here from the fall early month, getting dry again.

Richard · Unread post by **Richard** » Mon 15/01/2018 15:20

Past 30deg here again today, two days in a row Gore (31.3deg atm) has been up there as the warmest in NZ, not often you see that.

NZ Thunderstorm Soc · Mon 15/01/2018 17:51

Hot one here all-right. Cracked the 31C mark with a bit of a northerly breeze blowing through.
Too hot for this joker.

NZstorm · Unread post by **NZstorm** » Mon 15/01/2018 19:42

I see Dunedin Airport got to 34C today. That could be a record.

Nev · Unread post by **Nev** » Mon 15/01/2018 22:23

Flutterbye wrote: Mon 15/01/2018 10:01
Nev wrote: Mon 15/01/2018 06:56 THe Invercargill City Council WS is a Davis Vantage Vue mounted on the roof of their 5-6 story building in Esk St. So not exactly an 'official' WS, particularly as its temps can be up to 6C higher than the airport just a few kms away.
6 degrees higher? When it was showing through the 'Your Weather' on Metservice, the difference from the airport temp was 1 - 2 degrees, much like a lot of private stations...

My observation was based on the ICC's last 6 years of data (no data from late-Feb to Nov, 2015). Admittedly, the more extreme T-max anomalies between the ICC WS and the airport do seem to have lessened over the last year compared to previous years. So maybe something has changed?

Note that before yesterday, Invercargill Aero had only recorded 2 30.0C+ days so far this century, compared to 30 days in the last 6 years at the ICC's WS. And although the last of those 30 days (Feb 03, 2016) was only 1.6C higher than the airport, all the others (between Dec 2011 and Feb 2015) were between 3.5C and 7.0C higher than at the airport, with an average anomaly of 5.1C.

Nev · Unread post by **Nev** » Mon 15/01/2018 22:25

NZstorm wrote: Mon 15/01/2018 19:42 I see Dunedin Airport got to 34C today. That could be a record.

Dunedin Aero's Jan record is 34.6C (2004), making its reported 33.9C today the 3rd highest since records began in 1963. Its Feb and all-time record is 34.9C (1995).

Flutterbye · Unread post by **Flutterbye** » Mon 15/01/2018 22:47

Nev wrote: Mon 15/01/2018 22:23
Flutterbye wrote: Mon 15/01/2018 10:01

6 degrees higher? When it was showing through the 'Your Weather' on Metservice, the difference from the airport temp was 1 - 2 degrees, much like a lot of private stations...
My observation was based on the ICC's last 6 years of data (no data from late-Feb to Nov, 2015). Admittedly, the more extreme T-max anomalies between the ICC WS and the airport do seem to have lessened over the last year compared to previous years. So maybe something has changed?

Note that before yesterday, Invercargill Aero had only recorded 2 30.0C+ days so far this century, compared to 30 days in the last 6 years at the ICC's WS. And although the last of those 30 days (Feb 03, 2016) was only 1.6C higher than the airport, all the others (between Dec 2011 and Feb 2015) were between 3.5C and 7.0C higher than at the airport, with an average anomaly of 5.1C.

Maybe they've changed the weather station. As for the airport, I'm not surprised that they record very few 30+ degree days. If there was another weather station elsewhere in the city, it would likely be a different story!

Simon Culling · Unread post by **Simon Culling** » Tue 16/01/2018 01:26

MetService tweet gives the maximum on Monday as 33.9*C at Dunedin Airport.

https://twitter.com/MetService/status/9 ... 2341596160

Interestingly, a tweet from NIWA gives the maximum for Sunday for Invercargill as 31.8*C which contradicts the 32.3*C originally quoted by MetService - unless they are referring to another observing station rather than the airport.

Simon Culling · Unread post by **Simon Culling** » Tue 16/01/2018 04:47

I am sorry about posting twice while most of you guys are asleep, but there were some fascinating clouds on the northern side of Banks Peninsula yesterday (Monday 15th Jan) afternoon. They appear to have been caused by low level ripples/waves and aligned the cloud (probably stratus/cumulus) perpendicular to the E/NE surface wind. Did anyone photograph them from the ground?

https://twitter.com/MetService/status/9 ... 2557052928

https://twitter.com/danielcorbetttv/sta ... 9089478656

By the way, Dan Corbett used to present the weather on the BBC a few years ago. He was a bit of a character.

Nev · Unread post by **Nev** » Tue 16/01/2018 07:50

Simon Culling wrote: Tue 16/01/2018 01:26 Interestingly, a tweet from NIWA gives the maximum for Sunday for Invercargill as 31.8*C which contradicts the 32.3*C originally quoted by MetService - unless they are referring to another observing station rather than the airport.

The old manual site and NIWA's new EWS are just SE of the terminal (both recording 31.8C on Sunday), while MetService's AWS is NW of the terminal.

Richard · Unread post by **Richard** » Tue 16/01/2018 07:59

That would be the best example of the BP wave cloud.

Can we get a third ground hog day here today - cooled to 13.1deg and 13.2deg overnight both Saturday/Sunday and Sun/Mon - Both Sun & Mon's highs were 30.7deg & 30.8deg - Both days a light moderate NW blew till mid afternoon where a convergence line of cloud got pushed SW by a NE wind that was feed by daytime heating, only difference was Sundays NW wind change was stronger

Richard · Unread post by **Richard** » Tue 16/01/2018 08:14

Nev wrote: Tue 16/01/2018 07:50
Simon Culling wrote: Tue 16/01/2018 01:26 Interestingly, a tweet from NIWA gives the maximum for Sunday for Invercargill as 31.8*C which contradicts the 32.3*C originally quoted by MetService - unless they are referring to another observing station rather than the airport.
The old manual site and NIWA's new EWS are just SE of the terminal (both recording 31.8C on Sunday), while MetService's AWS is NW of the terminal.

And NW of the runway too, meaning the N-NE wind flow wont be be effecting the accucsy at all. the AWS is wide open. Got to remember too just because they are NIWA or MetS recording stations doesn't mean they all meet WMO standards either, some are in microclimate sites

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