General August Weather

tornado · Unread post by **tornado** » Sun 18/08/2019 18:09

NZstorm wrote: Sun 18/08/2019 17:40 Definitely the coldest day of the year for Auckland today with max 11C at the airport.

Some thunderstorms possible Wednesday to Friday timeframe western and northern NZ due upper level polar system. Isolated tornadoes. Something to keep an eye on.

yeah i reakon there will be more tornadoes too. from recen events theres already been about 5 tornadoes so far this month. 3 in taranki and 2 in auckland so far. last night there was a lightning strike near coromandel must of been big cause i saw a bright flash then loud house shaking thunder.

Razor · Unread post by **Razor** » Sun 18/08/2019 23:54

Looks like spring is here for Canterbury. Lots of wind and very little moisture in the coming days. West Coast will have some fun and games as will Southland folk

tornado · Unread post by **tornado** » Mon 19/08/2019 07:28

very cold here at the moment. only 3 degrees

David · Unread post by **David** » Mon 19/08/2019 07:37

tornado wrote: Mon 19/08/2019 07:28 very cold here at the moment. only 3 degrees

Just below 2C on my station. Had to defrost the car this morning, maybe only the 2nd or 3rd time I've had to do that the whole winter

Tornado Tim · Unread post by **Tornado Tim** » Mon 19/08/2019 09:28

I also am liking Thursday's chances of Thunder, the Upper streamline analysis is something to behold with the longwave directing the subantartic jet to join up with the sub tropic jet.
Some incredibly strong winds aloft will be measured over Tasmania over the next 72 hours, the leading cold front in the western Tasman being quite a Lightning producer at present.

Thursday is when we have the jet sliding over Northern New Zealand, in particular the exit region of the jet, which typically invigorates any convection that forms in that region.

The jet extends from 450-400hpa onwards but is still evident from 650hpa +, so there is a considerable amount of air being drawn up.

Jet.png

NZstorm · Unread post by **NZstorm** » Mon 19/08/2019 09:47

GFS is showing a warm front moving south over the upper North Island later tomorrow. That may support Isolated thunderstorms and looking like brief heavy falls of rain, more particularly in the east.

Richard · Unread post by **Richard** » Mon 19/08/2019 19:01

A 21.3deg range in temperatures today from a low -4.2 to 16.5 deg.

NZstorm · Unread post by **NZstorm** » Tue 20/08/2019 17:11

With the chilly weather over NZ recently looking like August temps will end up cooler than July. That will certainly be the case for Auckland's maximums.

tornado · Unread post by **tornado** » Tue 20/08/2019 22:17

sounds stormy out there tonight

NZ Thunderstorm Soc · Tue 20/08/2019 23:01

Here it isn't.

Cyclone Tracy · Unread post by **Cyclone Tracy** » Wed 21/08/2019 06:38

A nice 28mm with last nights warm front brings August's total to 130mm. The first month of 2019 to exceed the local average.

NZstorm · Unread post by **NZstorm** » Wed 21/08/2019 07:22

Some lightning occurred out in the Hauraki Gulf early this morning.

Thundery potential tomorrow starts early morning with a front coming in from the west before dawn.

David · Unread post by **David** » Wed 21/08/2019 07:29

Cyclone Tracy wrote: Wed 21/08/2019 06:38 A nice 28mm with last nights warm front brings August's total to 130mm. The first month of 2019 to exceed the local average.

Nice drop there. Had 8mm here yesterday evening then a further 6mm this morning.

David · Unread post by **David** » Wed 21/08/2019 08:45

Auckland council gauge near Cornwall Park picked up 43mm, including 28mm in the hour between 9-10pm. Quite a localised downpour by the looks of it

NZstorm · Unread post by **NZstorm** » Wed 21/08/2019 08:52

I recorded 19mm.

Orion · Unread post by **Orion** » Wed 21/08/2019 09:06

Quite a good shower of rain falling here at the moment.

Cyclone Tracy · Unread post by **Cyclone Tracy** » Wed 21/08/2019 09:11

A small convergence zone snaked from the Hibiscus coast into Auckland between 9 and 10pm last night. For once I was in the right spot

Some incredible outputs appearing from all ensembles in the stratosphere in the coming 10 days. I've created a separate thread, as it will move across calendar months. https://www.weatherforum.nz/phpBB3/view ... 13#p184533

Chris W · Unread post by **Chris W** » Wed 21/08/2019 11:58

Some decent convection going on over Amberley at the moment, in particular one cloud is going up at a rate of knots.

Richard · Unread post by **Richard** » Wed 21/08/2019 12:11

Chris W wrote: Wed 21/08/2019 11:58 Some decent convection going on over Amberley at the moment, in particular one cloud is going up at a rate of knots.

yes, can see them from here, a sign there's more energy in the sun now, wont be long before we'll be jumping up and down with excitement

Orion · Unread post by **Orion** » Thu 22/08/2019 05:41

Quite misty here at the moment; 5.4°C

Cyclone Tracy · Unread post by **Cyclone Tracy** » Thu 22/08/2019 06:21

The front coming into the upper NI this morning is quite lightning active around Northland at the moment.

tornado · Unread post by **tornado** » Thu 22/08/2019 06:44

this afternoon we may get a few isolated thunderstorms and hail

Razor · Unread post by **Razor** » Thu 22/08/2019 09:39

Its like GFS has had a complete reversal on its 10 day model overnight. A series of Tasman lows has been completely replaced by predominately high pressure for the duration. Remarkable flip flip really

David · Unread post by **David** » Thu 22/08/2019 10:48

tornado wrote: Thu 22/08/2019 06:44 this afternoon we may get a few isolated thunderstorms and hail

Uninteresting morning so far but looks interesting on the radar at the moment... fingers crossed!

Cyclone Tracy · Unread post by **Cyclone Tracy** » Thu 22/08/2019 11:13

Sparking 90 km NW of Auckland at the moment

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