General August Weather

Tornado Tim · Unread post by **Tornado Tim** » Wed 24/08/2016 14:00

Seems like the Auckland Radar has been tuned a bit while it was taken down for maintaince for a bit, lots of Light echos now being detected.

jamie · Unread post by **jamie** » Wed 24/08/2016 14:03

Still foggy here. Very dull day

NZ Thunderstorm Soc · Wed 24/08/2016 21:34

Cloudy and windy ENE day here today with people saying "It's Freezing outside", which I kept telling them that it wasn't necessarily so, because of the cloud cover and the NE wind and there was no ice forming, also the temperatures weren't cold enough for it to be freezing.

Brassnz · Unread post by **Brassnz** » Wed 24/08/2016 21:37

31mm rain here since midday, heaviest around 7pm or so.

jamie · Unread post by **jamie** » Wed 24/08/2016 21:38

Pushing 20mm here. I was more expecting 10mm from this and 20-30 from Friday. Happy to take 20 now tho.

NZstorm · Unread post by **NZstorm** » Thu 25/08/2016 07:24

We don't often get rain for a whole day in Auckland but looks that way today.

David · Unread post by **David** » Thu 25/08/2016 07:50

29mm here so far, expecting to get over 50mm for this event.

Nev · Unread post by **Nev** » Thu 25/08/2016 09:12

31mm to 9am here, including fog that's just lifting now. I see Grey Lynn's up to 37mm.

Also to 9am, MS have 32mm at Whangaparaoa, 24mm at Akld Aero and 49mm at Whitianga Aero.

Tornado Tim · Unread post by **Tornado Tim** » Thu 25/08/2016 10:16

Possible Elevated Thunderstorms for Northland down to Central Waikato from mid evening with risk increasing early morning for North to central Waikato.

Taking a parcel from 900hpa at 9 PM NZDT reveals instability due to near saturation of airmass, mid level jet starts kicking in later into the night and into the early morning dragging more moist air to 650hpa. Good upper level Jet sits over Northland, and down into the Waikato at 300hpa.

Quite a dynamic setup tonight for sure, SFC charts dont show this event well, upper level analysis is needed to pick it up.

Main key here is the moisture at upper levels to breach the saturated adiabatic lapse rate and get enough charge seperation. Perhaps not a good night photography session with any Lightning as there is going to be plenty of rain with any storm with high preciptable water values.

Attached: Tonight Forecast Sounding at 9 PM tonight. (parcel lifted at 900hpa)

Bradley · Unread post by **Bradley** » Thu 25/08/2016 10:29

Richard wrote:Light drizzle here.
Bit of a worry that here we are at the end of Aug and still no major rain event for Canterbury, the water table here is lower than last winter.

This morning run of EC is looking good though Richard, 30-40mm for places like Christchurch and even 25mm for places further north like Culervden, let's see if it actually happens now!! EC usually does pretty well with SW flows which this one will be so that is a positive...

Richard · Unread post by **Richard** » Thu 25/08/2016 11:07

Bradley wrote:
Richard wrote:Light drizzle here.
Bit of a worry that here we are at the end of Aug and still no major rain event for Canterbury, the water table here is lower than last winter.
This morning run of EC is looking good though Richard, 30-40mm for places like Christchurch and even 25mm for places further north like Culervden, let's see if it actually happens now!! EC usually does pretty well with SW flows which this one will be so that is a positive...

Here's hoping hey

seems like a life time ago since there was saturated paddocks around here

David · Unread post by **David** » Thu 25/08/2016 13:56

Only an additional 3mm since 9am, rain has been lighter than shown in the models so far today

Razor · Unread post by **Razor** » Thu 25/08/2016 19:36

Shockingly dry on my run up the Port Hills this afternoon. Its really getting quite serious. 20-30mm tomorrow (if it eventuates) and then nothing again just won't cut it, we need a few weeks of above average falls to get on track for decent spring growth

Manukau heads obs · Thu 25/08/2016 20:49

16.8C here now with the NW wind change..was only 12.8C before that
make that 18c at 10pm here now

Bradley · Unread post by **Bradley** » Thu 25/08/2016 21:49

Latest run of EC has dropped moisture down to around 20mm for Christchurch and around 10-12mm for Culverden, not good news unfortunately

NZ Thunderstorm Soc · Thu 25/08/2016 22:31

...well that's global warming for yer

..things looked fruitful initially but when we get to the actual event, nothing much really happens. It's been like that in Canterbury this year, which at the moment looks like to one of the most uneventful years for weather in the history of my weather records which I first began in 1988. Looks like the NZ Thunderstorm Society will have to close down because of nothing here to keep the society going.

Might start up a weather reporting society of weather event based in Geraldine, or something like that. might have to think about that?

Nev · Unread post by **Nev** » Thu 25/08/2016 22:37

Manukau heads obs wrote:16.8C here now with the NW wind change..was only 12.8C before that
make that 18c at 10pm here now

Yeah, MS also have Whenuapai, the Harbour Bridge, Whangarei and Kaikohe at 18C around 10:30pm.
Amazing…

Edit: I see Akld Aero also shot up to 18.3C just before midnight and Whenuapai up to 18.5C, so may have been higher earlier this morn. Whangarei also still over 18C at 6am this morn.

Manukau heads obs · Fri 26/08/2016 06:12

138kmh NW severe gales slammed through here at midnight..was noisy!

jamie · Unread post by **jamie** » Fri 26/08/2016 06:19

Manukau heads obs wrote:138kmh NW severe gales slammed through here at midnight..was noisy!

That must be a record?

Only 60km/h here.

Manukau heads obs · Fri 26/08/2016 07:03

yes, that is a just a new record for here

(by 1 kmh)

NZstorm · Unread post by **NZstorm** » Fri 26/08/2016 07:17

Grey Lynn weather station recorded 55mm for the 2 day rain event. I recorded 62mm.

Nev · Unread post by **Nev** » Fri 26/08/2016 07:26

Up to 52mm here for this event so far (same as Whangaparaoa).

84mm at Whitianga Aero, 54mm at Kerikeri Aero and Tauranga Aero, and 49mm at Hamilton Aero.

Edit: And about 86mm at Purerua in the Far North.

Richard · Unread post by **Richard** » Fri 26/08/2016 08:10

NZ Thunderstorm Soc wrote: It's been like that in Canterbury this year, which at the moment looks like to one of the most uneventful years for weather in the history of my weather records which I first began in 1988. Looks like the NZ Thunderstorm Society will have to close down because of nothing here to keep the society going.

The weather over the last year or so would some what match that of the last NZ Thunderstorm Society AGM, a complete nonevent.

David · Unread post by **David** » Fri 26/08/2016 09:04

Have had 52mm in Howick since midday Wednesday. Max gusts overnight only 40 km/h.

spwill · Unread post by **spwill** » Fri 26/08/2016 11:32

The general weather outlook looks more stable/ drier.
Have been in Wanaka this week, a cloudy mild weather week for Wanaka, no frost at all.

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