Thunderstorms 28/12/2012

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Richard
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Re: Thunderstorms 28/12/2012

Unread post by Richard »

spwill wrote:Low cloud clearing here now but there is plenty of med/high cloud.
Can see a line of towering Cu over West Auckland.photo
They are a similar looking cloud formation to what's around here
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Re: Thunderstorms 28/12/2012

Unread post by jamie »

If anyone is looking at this post right now go to metservice and look at the BOP radar. Use the slider back and forth quite fast and you can clearly see two different motions of rain clouds. The heavier stuff is all moving in a general SSW direction while the really light stuff is moving SE with the main cloud sheet.

Could anyone explain the cause behind this?
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Re: Thunderstorms 28/12/2012

Unread post by mikestormchaser »

Well bugger it! iv got a 24 hour bug but also determind to head up north if it starts fireing " dedication to storms even when having to stop on side of road for a chuck :P :lol: , have you not got ur cell phone with you richard? because if i am up i could also stop by at urs.
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Re: Thunderstorms 28/12/2012

Unread post by GreggWard »

jamie wrote:If anyone is looking at this post right now go to metservice and look at the BOP radar. Use the slider back and forth quite fast and you can clearly see two different motions of rain clouds. The heavier stuff is all moving in a general SSW direction while the really light stuff is moving SE with the main cloud sheet.

Could anyone explain the cause behind this?
I see what you mean Jamie, but sorry I am not sure how to explain it. Could it be that the lighter falls are coming from medium level cloud, whereas the heavier stuff is coming from showers that being steered by the lower level winds?

Still bloody cloudy here and the temperature is not climbing much, at this stage. I think we will struggle to get to the 23C, here, that Steve mentioned earlier, if this cloud does not move out of the way soon. :x
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Re: Thunderstorms 28/12/2012

Unread post by Richard »

Nope no cellphone Mike,i'll PM ya my homenumber

Starting to see a bit more development in the last hour,this looking to my SW,temp climbing up now on 25deg
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Last edited by Richard on Fri 28/12/2012 14:01, edited 1 time in total.
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Re: Thunderstorms 28/12/2012

Unread post by GreggWard »

Looks a lot better down your way Richard.
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Re: Thunderstorms 28/12/2012

Unread post by Tornado Tim »

jamie wrote:If anyone is looking at this post right now go to metservice and look at the BOP radar. Use the slider back and forth quite fast and you can clearly see two different motions of rain clouds. The heavier stuff is all moving in a general SSW direction while the really light stuff is moving SE with the main cloud sheet.

Could anyone explain the cause behind this?
Since the Radar is a composite reflectivity scan, I suspect it is virga being detected from higher based clouds than the showers that are at the SFC.
The higher level clouds producing the light precip or virga are flowing a different direction than the SFC wind direction, so that outlines shear is evident.
The only way to confirm this, is to look at the different elevation scans from the radar.....

Update: Got it in one Greg :)
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Re: Thunderstorms 28/12/2012

Unread post by GreggWard »

Tornado Tim wrote:
jamie wrote:If anyone is looking at this post right now go to metservice and look at the BOP radar. Use the slider back and forth quite fast and you can clearly see two different motions of rain clouds. The heavier stuff is all moving in a general SSW direction while the really light stuff is moving SE with the main cloud sheet.

Could anyone explain the cause behind this?
Since the Radar is a composite reflectivity scan, I suspect it is virga being detected from higher based clouds than the showers that are at the SFC.
The higher level clouds producing the light precip or virga are flowing a different direction than the SFC wind direction, so that outlines shear is evident.
The only way to confirm this, is to look at the different elevation scans from the radar.....

Update: Got it in one Greg :)
Thanks Tim :D
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Thunderstorms 28/12/2012

Unread post by jamie »

Thanks guys. My suspicions were correct then.

Drizzle here all day sometimes heavy. No chance of clearling I don't think.
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Re: Thunderstorms 28/12/2012

Unread post by ricky »

Some nice crisp towering Cu visible here at times through breaks in the cloud..
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Re: Thunderstorms 28/12/2012

Unread post by GreggWard »

Patches of blue sky now appearing and a little bit of sunshine. Can also see some Altocumulus Castellanus, so the atmosphere does appear quite unstable.
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Re: Thunderstorms 28/12/2012

Unread post by David »

ricky wrote:Some nice crisp towering Cu visible here at times through breaks in the cloud..
SW sea-breeze at the airport now, so there will be convergence somewhere in Auckland. Sun has just come out here - temperature up to 24C, dewpoint 21C
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Re: Thunderstorms 28/12/2012

Unread post by GreggWard »

Looks like the Waitomo coast is starting to heat up.
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Re: Thunderstorms 28/12/2012

Unread post by Richard »

My area is now back into moderate again and looking to the north and NW things do looked like the is development coming down from the Nelson area
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Re: Thunderstorms 28/12/2012

Unread post by Richard »

looking really good to the NW now,i'm certain that there will be a storm here in maybe an hour or so but going by the speed that these clouds are growing at it maybe bit sooner,if you CHCH blokes are going to chase,i would leave NOW.

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Re: Thunderstorms 28/12/2012

Unread post by Thunder »

We are up here already Richard. Sitting at the turnoff to Waiau for the moment just north of Culverden. Be here for the next 15 min atleast.

Some nice clouds about. May head closer to Waiau but will see what is happening first.

Cheers
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Re: Thunderstorms 28/12/2012

Unread post by snowstormwatcher »

Heavy rain and Thunder here in Nelson.
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Re: Thunderstorms 28/12/2012

Unread post by 03Stormchaser »

First cg if the day spotted!!
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Re: Thunderstorms 28/12/2012

Unread post by NZ Thunderstorm Soc »

Nothing much here at the headquarters of the NZ Thunderstorm Society but good to know that things are looking good especiallly in and north in Richard's territory :smile:
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Re: Thunderstorms 28/12/2012

Unread post by mikestormchaser »

Good stuff Steve and Aaron for getting out there! unfortunately iv goten worse as the day went on so havent been able to drive, constantly vomiting, so good thing i didnt go.
Looking at radar though some decent heavy showers on track, moving N to E and going off shore.
So guys it may be worth moving into the cheviot area.

Cheers mike
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Re: Thunderstorms 28/12/2012

Unread post by Richard »

Yes its looking good towards Waiau, well done you Falla's coming up this way too,this is the cloud that the cg came from.

By the way i'm on my way to Waiau too,be there soon,get a eye out for a grey Nissan.

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Last edited by Richard on Fri 28/12/2012 17:38, edited 1 time in total.
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Re: Thunderstorms 28/12/2012

Unread post by mikestormchaser »

hmm also must be some instability down south to as theres a thunderstorm that developed or 'has' developed around dunedin area aswel.
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Re: Thunderstorms 28/12/2012

Unread post by Storm Struck »

Good to hear you guys are out there chasing, i had work today gahh :rolleyes: but im off for 9 days now so thats good.
The area is much broader today on the maps than xmas and boxing day so there may well be some activity move down onto the plains and coast near Amberley and Oxford etc this evening.
It looks as though they are drifting South like the other day.
Canterbury, home of good rugby and severe storms
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Re: Thunderstorms 28/12/2012

Unread post by jamie »

convergence line forming just west of hamilton. hopefully it grows to something nice.
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Re: Thunderstorms 28/12/2012

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Caught the waiau storm, drove up to Mt Lyford. watching new buildups now closer to waiau
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