General August Weather

[Richard]

A lovely mild NW wind has come up this afternoon, 15.5C,hope it keeps up all night to keep any frost away

[Orion]

A great day altogether; much the same here: was 15.2 deg., now 15.0; slight NW breeze; sunny & blue skies; thrushes & chaffinches singing their spring songs.

[snowstormwatcher]

Mild here as well, High of 17 degrees. Timaru got 19 degrees.

[CHCH Weather Chaser]

Lovely day today. Got to 16 degrees. Tomorrows high is 17 and Wednesday going for 19!! spring!

[Tornado Tim]

I remember September 1st is officially the first day of spring but nature has been saying that it is for a bit longer.....

Pollen is everywhere, makes washing and waxing the car useless! As soon as you drive it you have it all on your car again.

[NZ Thunderstorm Soc]

I was going to put these 2 photos up on the 'Photographs' section but that seems to pre-occupied by bird photos at the moment
These were 2 shots of a castellatus looking cloud form moving up over Canterbury this afternoon.
As the barometer pressure is high, this could be a good forewarning of active cold fronts moving up over Canterbury this coming Spring/Summer

JohnGaul
NZThS

[NZ Thunderstorm Soc]

......sorry, he is the other photo, recorded round 3pm today.

JohnGaul
NZThS

[Richard]

......sorry, he is the other photo, recorded round 3pm today.

JohnGaul
NZThS

Oh man those clouds are looking so so ominous for the coming spring /summer alright John.

I did notice them way to the south and thought what odd looking cloud

[NZ Thunderstorm Soc]

They either dissipated quickly or became boring looking, ie. flat as they progressed further north, glaciated bits dissolving. Mind you the surface baro is sitting around the 1030hPa mark.
Imagine if it was about 990hPas if so, these clouds could develop into something which could be a bit more fun.
..anyway, I reckon that these clouds were probably remnants of last weeks cold weather event.

JohnGaul
NZThS

[Manukau heads obs]

it always puzzles me your reference to barometer John re thunderstorms
up this way we can get late afternoon thunderstorms in a high barometer

for spring time thunderstorms, you need a good SW frontal change....i.e not a high pressure over you...but that is a bit different...the only correlation to barometer is the weather pattern....its not the low barometer directly causing the thunderstorm...
you can still get thunderstorms in summer in canty under a high pressure, with convergence....yes?

[Manukau heads obs]

have misty rain here I was not expecting...real bee bop weather...

[spwill]

it always puzzles me your reference to barometer John re thunderstorms
up this way we can get late afternoon thunderstorms in a high barometer

?

I think for thunder in Canterbury you need more pronounsed troughing ( colder in the upper levels) )than up here due to the drier air down there so that would suggest a lower borometer.

[NZstorm]

We didn't see any storms last summer in Canterbury or the north, can only hope 2011/12 in more interesting.

[Richard]

I think for thunder in Canterbury you need more pronounsed troughing ( colder in the upper levels) )than up here due to the drier air down there so that would suggest a lower borometer.

yes but more about the Canterbury Plains,my area on the other hand can get storms during humid light N- NE airflows in conjunction with summer daytime heating.

The MS had strong to gusty NW winds in the forecast today dont know where they got that from,even where i was working today at 1000m there was little wind.

Been a lovely with a high of 16.2

[NZ Thunderstorm Soc]

it always puzzles me your reference to barometer John re thunderstorms
up this way we can get late afternoon thunderstorms in a high barometer

for spring time thunderstorms, you need a good SW frontal change....i.e not a high pressure over you...but that is a bit different...the only correlation to barometer is the weather pattern....its not the low barometer directly causing the thunderstorm...
you can still get thunderstorms in summer in canty under a high pressure, with convergence....yes?

I have found in my years as a thunderstorm enthusiast for Canterbury, a lower surface barometer makes it easier for thunderstorms to form rather than say around 1020hPa or above, especially when heating has been a factor against a cooler change, despite a fresh onshore wind, ie NE.
There have been isolated instances that a very weak thunderstorm or a 'break down in the atmosphere' ie. a flash of lightning, has occured in a SW frontal change under circumstances similar to the situation yesterday, but that being very rare.
Thunderstorms form in different situations up your way.

JohnGaul
NZThS

[spwill]

yes but more about the Canterbury Plains,my area on the other hand can get storms during humid light N- NE airflows in conjunction with summer daytime heating.

The daytime heating/convergent NE is a common TS ingredient right down the eastern side of the South Island but yes, where you are near the foot hills there will be occasions when storms occur over elevated ground under weak troughing.

Cloudy morning here with a fewlight showers, fine this afternoon. 15C

[Richard]

So nice to have a night with a NW wind after so many been sub zero and i see there's about a week of these to come bugger the snow,this is much better
10.5 deg and 51% humidity

[Skywatcher]

Another frosty morning here which will keep the average minimum for the month close to freezing.

[snowstormwatcher]

Mild northwesterly here, Currently 10 degrees.
I see Timaru is on 15 degrees at the moment while Ashburton is 0 degrees.

[Richard]

Mild northwesterly here, Currently 10 degrees.
I see Timaru is on 15 degrees at the moment while Ashburton is 0 degrees.

Isn't that a hard case and they are not far apart too.
This NW here is really starting to blow the dust about now.

[Michael]

Our ts are better in an easterly or NE type anticyclone situation or in a front changing the wind from NE to NW or W,Canterburys thunder in an W anticyclonic situation/WSW situation where the wind is modified as a NE and a W or SW change arrives on it.

[Skywatcher]

A cool, fresh and gusty westerly up in the Port Hills when I went a walk this morning but worth it for the view of the snowy peaks

Still some patches of snow in sheltered places even down to about 250m. Now up to 20°C here on the Plains.

[RWood]

The Met site shows Hokitika as having had barely 10mm of rain in the last 30 days. It may catch up a little in the next few days, but not too drastically by the looks of things.

[CHCH Weather Chaser]

Man! What an awesome day it is today! 21 degrees currently and very little wind so speak of. To think just over a week ago it was heavily snowing! 22 degree range today from minus 1 this morning.

[Nev]

...22 degree range today from minus 1 this morning.

I think Chch Aero managed -2.2C this morn and Timaru Aero, -1.5C