BLEAK Week a coming!

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Thunder
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Unread post by Thunder »

Yahooo! That photo is awsome Steven! Love the tatty sort of bottom of the cloud, it almost looks like a curtain or something. John has a photo of which I'm guessing is the similar type of cloud stucture as your photo Steven from a Ts here in Cantab, now I know the name for it, Cu arcus. I heard on Tv one weather about the hail in Auckland, cool stuff!

Can't wait for your other pics!

As for here in Chch today it's just been boring and cold. I got my digital camera back today as my Dad just came back from Oz, it's a GSmart LCD2 (very small and pratically no features, just point and shoot).

Here is a photo from today, "boring" and quality isn't great due to it being only 2 Megapixel and it was also getting dark:

Cheers
Aaron Wilkinson
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tich
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Unread post by tich »

But T/cu quickly started building with a scattering of heavy showers developing by early afternoon with hail and
isolated thunder. A few of the showers become very heavy and I photographed some nice thunderstorm structure over East Auckland where I was working today.
I thought that would happen after the rising morning temperatures in an unstable atmosphere. BTW is that a funnel cloud beginning to form in that storm you took a photo of Steven?

After persistent (but varying in intensity) rain in Chch this morning, this afternoon only brought a few brief, light falls. Must be the effect of the Banks Peninsula 'southeasterly rain-shadow'. However the rain has come back this evening. About 6C in Chch as well as Ashburton.

Lucky Westport - they got an 18C max in a 'reverse norwester' fohn wind!

Ben
Christchurch
Dean.
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Unread post by Dean. »

Beaut photos Steven,I must invest in a camera of that quality.
Persistent rain now with a few heavy showers as well,looks like we are in for heavy rain all night by the look of the 9.00pm Rakaia radar,the southeasterly rain is looping around Banks Peninsula and heading straight for Mid and North Canterbury,not much falling south of Timaru.
Temp still around 6 degrees,we will here on the news tommorrow of some record snowfalls for the year so far on the skifields I imagine.
Cheers.
Dean.
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Unread post by Dean. »

9.00pm Rakaia radar.
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NZstorm
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Unread post by NZstorm »

I stiched four photos togeather. This is the early stages of a developing cb over the Whitford area of east Auckland around 4pm today. :)

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Dean.
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Unread post by Dean. »

Mint !!!!! :)
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NZstorm
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Unread post by NZstorm »

and a few more snaps


Image
Cumulonimbus arcus


Image

Very heavy rain/hail about to hit.
Thunder
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Unread post by Thunder »

To right you are Dean. ;) 'Mint' pictures Steven. :) You've matched them up very nicely. Cool other photos to.

Tich wrote:
BTW is that a funnel cloud beginning to form in that storm you took a photo of Steven?
Were are you looking at in the photo?

Raining here steadily, not to hard, not to light, just right

Cheers
Aaron Wilkinson
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Unread post by NZ Thunderstorm Soc »

Hi Lads,
Good photos Steve. A shame you can't come down to the NZTS "AGM" on friday with some copies of your shots!!
Some good photos, lot of them unbelievable here in Chch. Best clouds forms you get here are mammatus forms you get from the NW in a NWesterly flow associated with a low barometer.
Steady but light rain falling here in ChCh. There must be good falls around Canterbury judging by the 9pm Rakaia radar, especially around BP and also the inland areas up to the mountains.
It will be interesting to see my rainfall total tommorow morning.
We are due for a 50mm
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Unread post by NZ Thunderstorm Soc »

type of scenario as we haven't had a good decent dump, since the 52.2mm 24hr on May the 7th
6.6mm to 10:30pm today, more rain to come.

John Gaul
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Dean.
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Unread post by Dean. »

The heaviest rain I have seen for a very long time here,will post totals later.
Temp only 5.0 degrees.
Must be some flooding around the district.
Cheers. :)
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NZstorm
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Unread post by NZstorm »

That will keep the farmers happy.....so long as they don't loose to many lambs ofcoarse. Must be alot of snow in the ranges down there Deano.

Has dawned a crystal clear morning in Auckland with 8C. As the days warms up I expect the cumulus to develop with showers developing after lunch with a fair chance of localised thunder/hail storms again. Upper air at Midnight sounding was conditionaly unstable to 8800m(29,000ft). ;)
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TonyT
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Unread post by TonyT »

Check out http://satellite.landcareresearch.co.nz ... d10093.jpg (Weds 10th, 7.17am) and notice the Karmann vortices running up the west coast of the North Island, generated in the low cloud by the flow around Mt Taranaki. Very cool.
tich
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Unread post by tich »

Were are you looking at in the photo?
I was looking towards the right of the cloud in the photo.

From Deano's comments, mid Canterbury must've been feeling the full force of this rain event. The radar shots agree. But they also show little precipitation over Chch and Banks Peninsula overnight. This morning, apart from a brief 'heavy' shower about an hour ago, there's only been light rain here in central Chch. The Avon hasn't risen much - definitely not in flood.[/quote]
Manukau heads obs
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Unread post by Manukau heads obs »

no chance of showers in the auckland area today wtih a southerly and not a SE wind, which is needed
i cant believe they (met aervice) thought we would, going by the forecast for today, made yesterday
another mistake
no 2 days are ever the same here!
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TonyT
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Unread post by TonyT »

http://nrfa.fire.org.nz/fire_weather/we ... awData.asp gives the 24 hr rainfalls for Canty as between 35-65mm, highest in Mid Canty as Dean noted. Bottle Lake was only 12mm, which confirms Ben's suggestion that Chch got only a fraction of the total fall, which is what we expect in SE airflow due to the rainshadow effect of Banks Peninsula.
Manukau heads obs
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Unread post by Manukau heads obs »

what do you think steven?
maybe a late afternoon SE change coming up through the waikato with a squall line?
i am not high enough to see that far , but will after i pick up the eldest from school

a cool southerry here, only 13.8 C despite a sunny day
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Unread post by Manukau heads obs »

i got this from Bob McDavitt:
I issued this news release yesterday afternoon - note that in the
wording of a news release we have more space to elaborate on the
forecast, and that the idea of isolated thunderstorms this afternoon is
on the provisio that the trigger temp (16 degrees) is reached. This can
happen in light winds, but the pressure gradient is from the S/SW and
any onshore flow may help us "keeep our cool" today.Hail Hits Silverdale


Heavy showers developed over Waikato on Tuesday afternoon and
moved northwards onto Auckland. Some of these showers were
intense enough to contain hail. One hail shower came onto
Silverdale out of a blue sky just after school closed. First
of all there was a veil of heavy rain and then the hail.
Within minutes it was over, plastering the ground as white as
snow with hailstones.

"This was an awesome show of how quickly the weather can change",
commented MetService Weather Ambassador. "The showers were
mentioned in the forecast and it only took them about two hours
to grow once the sun had heated the ground to over sixteen
degrees in Waikato. We were able to track these intense
showers on our radar as they travelled northwards across
Auckland."

MetService is keeping the possibility of a thunderstorm in the
forecast for Wednesday afternoon, but if the wind direction swings
around to a southwesterly direction then conditions may prove to
be too cool.

Attached file shows the MetService weather radar at 3:15pm on
Tuesday with heavy rain over Orewa.
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Dean.
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Unread post by Dean. »

My rain gauge reads 71 mm since yesterday morning,not bad for here.
Mt Hutt had received 45 cm of snow up to 6.00am this morning,I would say it would be around the 70 cm mark by now.
Rain has eased to showers.Looking forward to hitting the slopes on Friday.
:)
Winchmore Research station,about 10 km inland from Ashburton recorded 46 mm of rain between 3.00am and 9.00am this morning.
tich
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Unread post by tich »

Mt Hutt had received 45 cm of snow up to 6.00am this morning,I would say it would be around the 70 cm mark by now
I'm not sure what levels snow fell to in Canterbury, but I'd it would've been down to about 500 metres inland overnight (probably not as low on Banks Peninsula, if any snow settled there at all)

The weather has eased in Chch as well, but shower activity is probably still about, (I haven't checked the latest radar) and it still feels cold and bleak.[/quote]
Thunder
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Unread post by Thunder »

Yeah, I haven't seen the type of rain mid and north Canterbury have been seeing here in Southshore, most definately that rain shadow cast by Banks Peninsula is the problem or if Micheal was living down here the 'solution'. ;) Actually I'm on your side Micheal when it comes to drizzly rain that goes on for a bit (a few days or more), I don't like it much.

Cheers
Aaron Wilkinson
Thunder
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Unread post by Thunder »

http://satellite.landcareresearch.co.nz ... n10093.jpg

Is this heading towrds Auckland? Looking at wind direction on Metvuw.com I'm guessing it could be but I'm not sure. Anything guys? ;)

The radar shows something sneaking up, the 9pm radar will reveal more!:

http://www.metvuw.com/cgi-bin/mcgregor/ ... 00Z_ak.gif

Cheers
Aaron Wilkinson
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NZstorm
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Unread post by NZstorm »

Aaron, thats a very mature looking cb sitting over the BOP(off waihi).
I don't ecpect this cloud to travel far. As it moves into the Coromandel it will lose its puff. I think the relatively warm sea temps will have given it some energy but once these sorts of cloud hit land on a cooling night, its time to draw the curtains.

Tomorrow is another day. As Brian says, no two days are the same.

Thanks for passing on that info on the Orewa hail storm Brian. Interesting reading. I sure the Thunderstorm I photographed over SE Auckland yesterday would have had some decent hail within it.
The cloud showed all the hallmarks of being quite nasty.
Manukau heads obs
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Unread post by Manukau heads obs »

i think its weakening, and slower its northward movement now..
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