General May Weather

Orion · Unread post by **Orion** » Thu 21/05/2015 21:54

Sounds like the southerly is just arriving here, a hissing in the shrubbery $\:D/$

Richard · Unread post by **Richard** » Thu 21/05/2015 21:55

Some lightning flashes can be seen south of CHCH

Razor · Unread post by **Razor** » Thu 21/05/2015 22:12

Richard wrote:Some lightning flashes can be seen south of CHCH

Can't see it from here. But maybe that's because the curtains are closed

NZ Thunderstorm Soc · Thu 21/05/2015 22:21

Probably the incoming southerly.
Still NW here and 13C.
EDIT: Just gone SW here, clouding over and strong.

Orion · Unread post by **Orion** » Thu 21/05/2015 22:24

?? Did I just hear thunder??

Edit: Yes!

Orion · Unread post by **Orion** » Thu 21/05/2015 22:30

That sounds like quite a busy storm, many peals of thunder since my last post and rain just beginning here.

Orion · Unread post by **Orion** » Thu 21/05/2015 22:38

Quite spectacular lightning: had time to count only 2 seconds between last flash and thunder.

Orion · Unread post by **Orion** » Thu 21/05/2015 22:45

Brief pea-sized hail

NZ Thunderstorm Soc · Thu 21/05/2015 22:55

Orion wrote:Quite spectacular lightning: had time to count only 2 seconds between last flash and thunder.

Nothing much seen from here, also not picking up much sfericals?

carrot · Unread post by **carrot** » Thu 21/05/2015 23:05

Having some brief loud hail here now

tich · Unread post by **tich** » Thu 21/05/2015 23:07

Hailing now in St Albans.

Richard · Unread post by **Richard** » Fri 22/05/2015 00:15

hail here as well

David · Unread post by **David** » Fri 22/05/2015 09:33

Looks like a wet day here tomorrow, severe weather watch issued for heavy rainfall in Auckland.

treetop · Unread post by **treetop** » Fri 22/05/2015 12:15

Plenty of action in the States [maybe next year] Looks wet for Northland severe storms etc. Will move through quick by the looks.Hopefully someone will be up there to report

littleheaven · Unread post by **littleheaven** » Fri 22/05/2015 16:52

David wrote:Looks like a wet day here tomorrow, severe weather watch issued for heavy rainfall in Auckland.

Yes, also a severe thunderstorm watch in place for Auckland up, and Coromandel. Exciting!

David · Unread post by **David** » Fri 22/05/2015 20:52

littleheaven wrote:
David wrote:Looks like a wet day here tomorrow, severe weather watch issued for heavy rainfall in Auckland.
Yes, also a severe thunderstorm watch in place for Auckland up, and Coromandel. Exciting!

Strange how the severe thunderstorm watch map does not align with the regular thunderstorm outlook map. The regular outlook includes Auckland city area in the downpour risk zone, but the severe thunderstorm watch map doesn't

treetop · Unread post by **treetop** » Sat 23/05/2015 07:24

Just seeing moderate rain on the radar, no red anywhere. Always risk of a few elevated IC rumbles.

Nev · Unread post by **Nev** » Sat 23/05/2015 09:28

Here's this morn's T-storm Outlook for today…

MetService - Thunderstorm Outlook

Valid to: Midnight Saturday 23 May 2015
Issued at: 8:59am Saturday 23 May 2015

A low pressure system and active rainband is expected to move in an east to southeast direction across northern New Zealand today, bringing a period of heavy to areas of the upper North Island. There is a moderate risk of localised downpours of 25 to 40mm/hr with this rainband, affecting Northland, Auckland (particularly northern and eastern areas), Coromandel Peninsula and the western Bay of Plenty this morning and afternoon, and Gisborne later in the afternoon and evening. Please see the latest SEVERE WEATHER BULLETINS for further details. Additionally there is a low to moderate risk of thunderstorms embedded in the heavy rain band.

Behind the low and rainband, a cold front is forecast to move across the upper North Island, bringing a moderate risk of a few thunderstorms to Northland,Auckland, Coromandel Peninsula and the western Bay of Plenty in the afternoon and evening. A lesser risk of thunderstorms extends southwards over northern parts of Waikato and the eastern Bay of Plenty.

Elsewhere, no thunderstorms or significant convection expected.

MetService T-storm Outlook Map for May 23.png

David · Unread post by **David** » Sat 23/05/2015 10:34

17mm here so far,

spwill · Unread post by **spwill** » Sat 23/05/2015 11:50

Back in paradise but I will miss those US thunderstorms, powerful thunderstorms for most days of our trip over there

Looks like a low chance for thunder here next 3 or 4 days as some cold air moves across, a humid airmass here this afternoon might help generate a heavy shower.

Manukau heads obs · Sat 23/05/2015 13:10

heavy rain here at the moment

David · Unread post by **David** » Sat 23/05/2015 13:26

Manukau heads obs wrote:heavy rain here at the moment

Reasonably heavy here too, 8mm last hour. Up to 30mm total.

Manukau heads obs · Sat 23/05/2015 13:57

torrential rain here currently
barometer dropping like a rock too
looks like the low center is going to pass right over

Manukau heads obs · Sat 23/05/2015 14:13

barometer dropping about as fast as I have seen it
4hpa /hr drop currently
now down to 991.5

update
dropping at over 5hpa/hr
now at 6hpa/hr dropping!
989.4
GFS had it at 990 by 6pm over BOP
so deepening a bit faster than models had it

David · Unread post by **David** » Sat 23/05/2015 14:16

Wow, that is a fast drop! I'm at 3.1 hPa drop in the last hour. Temperature has gone up quickly too, almost 17 now

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