Unstable squally western NZ 11-15th July

[Manukau heads obs]

that waiuku CB had white on the rain radar just SE of Waiuku
the sat image shows the jet stream peaks right over this area too
more and more cu cloud here ahead of the next big shower area


update!
wife just phoned, 1cm hail at waiuku college!
pilled up like snow she said!

[jamie]

Wow thats a good hit

[Manukau heads obs]

humm, the next lot of showers is going to pass just to the north of me now..seems to have stopped moving SE and is moving more ESE....and I will be in a gap between shower bands....not that we need any more rain!

and it has weakened , that shower area approacing the auckland area...lightning strike rate is dropping away

[NZstorm]

Heavy squally rain here atm.

[Manukau heads obs]

ah, the heavy rain over the radar site had made it looked like the rain area had contracted in size...
for a few updates there...

not as lightning ative as it was early, damit

[David]

Had become very wet here! Gloomy, rain rate around 10mm/hr, NW gusting 40km/h.

[Vertigo]

parents have reported an intense line of thunderstorms and hail in te kauwhata over the past hour or two

[Manukau heads obs]

http://metservice.com/national/warnings ... rm-outlook

interesting, M/S have it that this active zone will become more active as it moves further east..

temperature and DP has dropped here now, so threat of sig CB activity has dropped here for me now I would suspect
wind dir has not changed yet, that must be with the next shower line still to come in..

Vertigo,that will be the same one that Waiuku got

[Manukau heads obs]

http://www.facebook.com/photo.php?fbid= ... =1&theater

[Tornado Tim]

Nice rumbling thunder here.....

[spwill]

Interesting reports, cooler here now. Still looking very thundery out to the west of Northland.

[jamie]

Flooding rains in the Waikato. Not overly heavy but ground can't take anymore. All drains to north of Hamilton were flooded thismorning and rain continuing to fall

[jamie]

Wow my station just recorded rain rate of 174mm/h

[Manukau heads obs]

about to hit here, that next frontal line

[Manukau heads obs]

picy

[David]

That shower line just gave Howick a heavy downpour and a brief SW change with gusts near 50km/h, turning lighter WNW again now...

It sure looked ominous as it approached!

[jamie]

massive hail storm here right now. also heard thunder about an hour ago

[NZstorm]

We could possibly add the 15th onto this thread. Could be our last thunder risk day for a while. We have a polar airmass spreading onto the North Island with 500mb temps dropping to -30C over Auckland by the middle of the day. While the airmass is dry, instability weak there should still be enough support for scattered hail, isolated thunderstorms/squalls 50kts in the west of Auckland/Waikato today.

[Nev]

We could possibly add the 15th onto this thread. Could be our last thunder risk day for a while...

Ok, done!

[Manukau heads obs]

no lightning picked up by me at all at the moment
are getting squally coldies though, gusting to 45 knots

[Manukau heads obs]

M/S also going with a trough this afternoon producing thunderstorms for the auckland area
http://metservice.com/national/warnings ... rm-outlook

another day of thunder possible, sure have had a great run!

[NZstorm]

There is a short wave in the SW flow, currently seen over the top of the SI in the satellite pic.

[David]

Brief heavy shower here, there were tiny bits of hail mixed in with the rain. Wind has gone WNW at the moment, strangely...