Unsettled week ahead

NZ Thunderstorm Soc · Tue 18/12/2007 17:29

Nice NE convergence moved back through here from about 3:30pm with a return to NE and drizzle.
Unfortunately, no ummmph to make it looks a bit more exiting.
Barometer too high for any thunder activity, well actually I can't see any thunder possibilities for ChCh for ages, at the moment, sadly

JohnGaul
NZTS

jamie · Unread post by **jamie** » Tue 18/12/2007 17:49

Far out foggy just had a heavy shower there. His weather station jumped up to 3.209mm/min

Willoughby · Unread post by **Willoughby** » Tue 18/12/2007 17:57

Yes, we've just had a good burst of a showering; 8.6mm in the space of 15 minutes.

Still very sticky; 20C/DP 19C... peaked at 20.5C at 4.06pm.

ricky · Unread post by **ricky** » Tue 18/12/2007 18:27

Yes good downpour here alright

looked out the window and saw one bright IC flash... Driving to Mt Roskill there was quite a lot of surface flooding, seemed to be where the radar was showing the heaviest too

More Incoming now too with heavy rainfall showing over the Kaipara.. where the earlier cells seemed to really get going.. Dewpoing recently hit 20.5 !

spwill · Unread post by **spwill** » Tue 18/12/2007 18:36

Yes , a crop of heavy showers just west of Northland now heading this way.

Cameo1 · Unread post by **Cameo1** » Tue 18/12/2007 19:50

Absolutely pouring here now

no thunder yet though, still stinking humid

NZstorm · Unread post by **NZstorm** » Tue 18/12/2007 20:54

The rainguage at west Auckland (Massey) has recorded 17.2mm last hr. Just 3mm here.

Storm Struck · Unread post by **Storm Struck** » Tue 18/12/2007 21:59

We had a nice amount of rain overnight and into this morning here, 26mm of the stuff which should last for a week perhaps

.
It wasnt that cold though today, quite refreshing after a few days of 30C in a row.
Cheers
Jason.

Manukau heads obs · Wed 19/12/2007 06:46

22mm here overnight
nice

I see a large area of rain has just slipped past auckland to the NE this morning

David · Unread post by **David** » Wed 19/12/2007 07:02

I was expecting quite a dump of rain, unfortunately only 6mm overnight here, and looks to be no rain coming for at least several hours

Manukau heads obs · Wed 19/12/2007 07:06

I think you have just been very unlucky, and have had rain bands go either to the west or east of you
http://www.metservice.co.nz/default/ind ... rlast24hrs

NZstorm · Unread post by **NZstorm** » Wed 19/12/2007 07:31

21mm here since yesterday, the rainguage at Massey (6km west of here) got 41mm off this sytem.

Air looks like it should remain conditionally unstable today. If we can get some decent daytime heating will see a thunderstorm or two pop up this afternoon.

But cloud cover currently looks extensive.

Cameo1 · Unread post by **Cameo1** » Wed 19/12/2007 07:38

Why do we need daytime heating when dew points and daytime temps are so high?

David · Unread post by **David** » Wed 19/12/2007 09:16

I think its a bit cool for thunder today, only 18.4C here. Would be nice to still get some heavy rain though

NZstorm · Unread post by **NZstorm** » Wed 19/12/2007 10:47

Why do we need daytime heating when dew points and daytime temps are so high?

Heating from the sun raises the surface temperature which adds to the CAPE. Also, importantly, it creates thermals and gets the air rising. No sun, no thermals. Can't see the overcast breaking easily though.

spwill · Unread post by **spwill** » Wed 19/12/2007 10:58

Why do we need daytime heating when dew points and daytime temps are so high

it's relative to upper air temps. Current 21C and 18C dewpoints would be excellent for storms in our winter/spring enviroment.

David · Unread post by **David** » Wed 19/12/2007 11:10

Metservice didn't know what to do again, forecast has completely changed now to showers (I can't see those happening either) and looking like we will get pretty much no more rain for a week.

Manukau heads obs · Wed 19/12/2007 11:28

there will be a band of showers with the change in airmass to the lower dew point and cooler air in the S/SE change on the other side of this trough to our west

tich · Unread post by **tich** » Wed 19/12/2007 11:31

Unforecast drizzle in central Chch this morning - small yellow blob on radar over part of city, dry over rest of Canterbury. Weather seems to be brightening up now.

jamie · Unread post by **jamie** » Wed 19/12/2007 14:27

Looks to be a nice storm brewing over Mt Te Aroha.

David · Unread post by **David** » Wed 19/12/2007 15:10

A clearance coming over Auckland now, might enhance heavy shower development?
Temperature 21.5 and rising.

Achten · Unread post by **Achten** » Wed 19/12/2007 17:14

63mm here so far, raining quite heavily at the moment.

Cameo1 · Unread post by **Cameo1** » Wed 19/12/2007 17:30

Oh right, thanks

spwill wrote:
Why do we need daytime heating when dew points and daytime temps are so high
it's relative to upper air temps. Current 21C and 18C dewpoints would be excellent for storms in our winter/spring enviroment.

NZstorm · Unread post by **NZstorm** » Thu 20/12/2007 07:29

Yesterdays storms were over the upper west of the SI.

If the moisture (dp13-15C) can hang on over the Waikato/Bay of Plenty untill this afternoon, a thunderstorm or two will pop up. Upper air will continue to cool off today. However, the drier air over the lower NI is working its way north and may kill off the convective chances.

jamie · Unread post by **jamie** » Thu 20/12/2007 17:59

clouds building over the kaimai ranges. looks really neat with the height of them and their sharp edges against the blue sky

NZ Weather Forum

Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead

Re: Unsettled week ahead