General September Weather

[Razor]

MS just issued a severe warned TS, Mt Peel area. John should be seeing some action

[darcyplumb]

MS just issued a severe warned TS, Mt Peel area. John should be seeing some action

Was it last year or the year before that a storm parked itself up there and dropped 120mm in two hours?

[NZ Thunderstorm Soc]

Southerly through at 1650hrs, with strong and squally winds.No thunder but steady rain.
I don't know why a STW from MS was issued as most of the electrical activity seemed to of died away when the southerly moved over.
The STW should of been issued when that line of hail looked quite suspicious, south of Timaru.
No hail here thank goodness.

[Dean.]

The warning area is well north of Geraldine....Mid Canterbury,Hakatere and Lake Clearwater

[Bradley]

Very heavy rainfall here in West Melton the last hour, just stuck in the wrong spot underneath the front!

[darcyplumb]

Wow the gust front has just hit here and the wind is very strong. Rain curtains being whipped up off the road. Street lights are surging on and off.

[Orion]

Little rattly bits hitting the window briefly. Temp. down to 9.6°C so far and rain sounds heavy.

[Dean.]

One decent gust front!
Some of the heaviest rain I've seen here.

[Orion]

And thunderr!

8.0°C now.

[Dean.]

And thunderr!

8.0°C now.

Huge flash here in Allenton

[Orion]

And thunderr!

8.0°C now.

Huge flash here in Allenton

My Westerfield Spy heard the thunder simultaneously - texts and posts flying everywhere!

[darcyplumb]

Unusual to see such an intense band of rain at the back of a change like this. It’s been training over the same area for at least an hour now.

[mikestormchaser]

Unusual to see such an intense band of rain at the back of a change like this. It’s been training over the same area for at least an hour now.

I'm wondering whether that might be a snow echo Darcy. Can get convective set ups like that especially this time of year. Snow levels might be at 4 or 500m but heavy at that level being convective.

Snowing on burkes pass earlier. This will be easing by midnight and heading north

[darcyplumb]

Unusual to see such an intense band of rain at the back of a change like this. It’s been training over the same area for at least an hour now.

I'm wondering whether that might be a snow echo Darcy. Can get convective set ups like that especially this time of year. Snow levels might be at 4 or 500m but heavy at that level being convective.

Snowing on burkes pass earlier. This will be easing by midnight and heading north

Thanks for your input. Interesting about the snow echo. I hadn’t thought of that. It looked quite steady on Burkes Pass earlier, also snow falling in Fairlie.

[darcyplumb]

Friends in Methven and Staveley have steady snow falling right now.

[Storm Struck]

Not surprised to hear about the lower snow across the Waitaha region. That convection as Mike has mentioned bringing the snow levels down.

Plenty of heavy rain here before and some brief small hail, another pleasant top up of rainfall.
Onto the next wave of fronts
Also looking quite warm from mid week next week, as that air comes across from a sizzling Australia currently.

[tich]

Not surprised to hear about the lower snow across the Waitaha region. That convection as Mike has mentioned bringing the snow levels down.

Not uncommon - I recall (and have read about on Paperspast) plenty of occurrences where snow has fallen down onto the plains, often much lower than forecast under similar situations.
Some briefly heavy downpours of rain in St Albans this evening, though easing now.

[NZ Thunderstorm Soc]

Grey and overcast this morning with low cloud but clearing away to become a fine and sunny day although it was a tad hazy with some cloud forms around. Light NE developing this afternoon with it getting up to 15.5C.
From about 3pm, cloud developing to the west and increasing more so from about 4pm with thunder heard to the south just before 5pm.
A few distant rumbles were heard but that was it. Los of sferics on the AM band.
Strong southerly came through just before 5pm with it coming onto rain with 12.3mm falling until the rain and wind eased by 8:45pm.
Wind around to the north later this evening after the southerly died out.
No thunder was heard north of here,sadly, despite MS STW, although it could of been further north than "Thunderstorm Corner." as usually you can here thunder from the TC region, here.

[spwill]

The trough crossing NZ tomorrow looks very cold. For the North Island there is a moist morning front followed by very cold upper level troughing, some thunder on the cards. Looks particularly cold with the strong winds tomorrow.

[mikestormchaser]

Another risk of heavy showers and hail for coastal Canterbury this evening/ tonight. I'd have more of a risk of thunderstorms aswel.

North Islands turn again tomorrow as spwill mentioned with strong upper cold trough. Then Monday again another potential for South island before a settled and warmer period later next week. The mountains look like they have more snow on them this morning than they have all winter.

[Richard]

The mountains look like they have more snow on them this morning than they have all winter.

Yes, thinking that this morning. Wont last long next week though.

This month has turned out about average for rainfall with 64.2mm

[NZ Thunderstorm Soc]

Another risk of heavy showers and hail for coastal Canterbury this evening/ tonight. I'd have more of a risk of thunderstorms aswel.

Chances looking very remote hee now
Been W to NW this afternoon with humidity around 30%.

[David]

Gusting up to 160 km/h at Cape Turnagain in the last couple hours

[mikestormchaser]

Another risk of heavy showers and hail for coastal Canterbury this evening/ tonight. I'd have more of a risk of thunderstorms aswel.

Chances looking very remote hee now
Been W to NW this afternoon with humidity around 30%.

Very coastal set up tonight John, one would suspect birding flat/ ashburton river mouth could be the best spot later. Will see what happens. I think metservice outlook has the risks spot on.

[NZ Thunderstorm Soc]

I'm expecting that too. Might see a flash out to sea
Winds died down now and calm. Awaiting the SW to come through and see what will eventuate from then ?