Unstable squally western NZ 11-15th July

[jamie]

That was a good squall that just came thru. Some rather heavy rain to it. No hail tho which suprised me

[bmo]

Really heavy shower here now

Just as i was typing this it ended

[jamie]

Thunder here. Must be about 5 days in a row i have heard thunder thunder.

[Manukau heads obs]

just seen lightning out to sea
getting windy again...gusting to 50 knots...

[NZstorm]

I saw a flash out to WSW.

Notice the dp has come up to 10C, from 7-8C this afternoon.

[Manukau heads obs]

real close here!
DP 11C

[bmo]

Sent the thunder and lightning up here please! And please don't forget the hail!
Had 6.35mm of these short sharp showers. Max wind today so far is 43.9kph.

[Michael]

Lightning here too thunder 15sec after

[Manukau heads obs]

papakura area in the firing line again...
amazingly the peak of this CB passed just 2km to the south of me...same place as the one last night....

[Vertigo]

saw a strike over henderson way or beyond, in a line from beachaven

[jamie]

DP and temp rising? whats going on? im at 13C and 11DP right now. is there going to be yet another front to come?

[Manukau heads obs]

DP and temp rising? whats going on? im at 13C and 11DP right now. is there going to be yet another front to come?

same thing where, its back up to 12.8C here
but no real sign of another front on the sat map, except down taranaki way...
just a flow tending more westerly again in the tasman

big rain clouds moving across Aus at the moment...what going to happen to that once it hits the tasman?

[Nev]

Thought it might be an idea to create separate threads for the 2 events recently reported as 'tornadoes'. Note that some posts from here have been moved to this thread.

[Tornado Tim]

Had a fairly heavy squally shower come through last night at 2 AM up to 108mm/hr at one time.

As Jamie mentioned in the July Thread, the ground cant absorb much more water.
16.2mm so far today (midnight reset)

[GreggWard]

Have just had two thunderstorms pass over and to the N of Palmerston North, in the last hour. The lightning was only every three to five minutes, but was mostly CG lightning. It seemed to have a pinkish tinge to it.

[jamie]

A couple of days past the title I know but just got woken by some amazing thunder that went on and on. Fitted well with my dream of me being in a war. Great sound effects haha.

Almost like American movies where the thunder hits and then the rain starts pouring. Exactly that here

Dang that was a super super quick 7mm

[Tornado Tim]

A steady increase in lightning now going by the bolteks

[Manukau heads obs]

thunder heard here!
my boltec is tracking 2 cells heading my way

[Tornado Tim]

thunder heard here!
my boltec is tracking 2 cells heading my way

Your ftp doesnt seem to be working Brian for your lightning data....

[Tornado Tim]

owh, Severe T-storm Warning for Port Waikato:

SEVERE THUNDERSTORM WARNING
TOP PRIORITY FOR IMMEDIATE BROADCAST
Issued by MetService at 07:05 am Thursday 14 July 2011.
Valid until 07:52 am Thursday 14 July 2011.
This warning affects people in the following local government areas:
FRANKLIN.
At 06:52 am, MetService weather radar detected severe thunderstorms near OFFSHORE PORT WAIKATO.
These severe thunderstorms are moving towards the eastsoutheast, and are expected to lie near PORT WAIKATO, TE KOHANGA and ONEWHERO at 07:22 am and are expected to have dissipated by 07:52 am.
These thunderstorms are expected to be accompanied by very heavy rain, large hail and damaging wind gusts.
Very heavy rain can cause surface and/or flash flooding about streams, gullies and urban areas, and make driving conditions extremely hazardous.
Large hail can cause significant damage to crops, orchards, vines, glasshouses and vehicles, and make driving conditions hazardous.
Very strong wind gusts can break branches from trees, damage roofing, and make driving hazardous especially for high-sided vehicles and motorcycles.
The Ministry of Civil Defence and Emergency Management advises that as storms approach you should:
- Take shelter, preferably indoors away from windows;
- Avoid sheltering under trees, if outside;
- Move cars under cover or away from trees;
- Secure any loose objects around your property;
- Check that drains and gutters are clear;
- Be ready to slow down or stop, if driving.
During and after the storm, you should also:
- Beware of fallen trees and power lines;
- Avoid streams and drains as you may be swept away in flash flooding.
This warning is due to be updated or lifted by 07:52 am Thursday 14 July 2011.
NOTE: Only severe thunderstorm tracks are shown in the graphic. Other thunderstorms may exist in the area.

MEDIA PLEASE NOTE: This warning will be updated within the next hour or so. MetService would appreciate it being broadcast regularly during this period

[jamie]

picking up heaps of lightning to my NW and hearing a constant low rumble. Surprised to see that was severe warned earlier

[Manukau heads obs]

uploads are working Tim
http://www.weather-display.com/windy/gb/screenshot.png
http://www.weather-display.com/windy/gb/StormVue.html

I could see the lightning from that port waikato strom this morning

its the CB out to my NW that is the next one

they are being enhanced by the jet stream that moved over australia yesterday that I mentioned
(you can see towers with their snout in the jet stream cloud)

[Tornado Tim]

Cool, Thanks Brian
Your static screenshot on your site was linking to this: http://www.weather-display.com/windy/gb/nexstorm.png

[Manukau heads obs]

reports waiuku just had a good thunderstorm

[NZstorm]

I agree Brian, the jet stream is the key ingredient there this morning.