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Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Sun 30/08/2015 13:38
by David
Much of the North Island and the top of the South Island look to be in the firing line for some heavy rain and/or strong winds early this week.
Issued: 2:48pm Saturday 29 Aug 2015
Valid from Monday 31 August 2015 to Thursday 3 September 2015
During Monday, a deepening low should approach northern New Zealand, then move southwards onto central New Zealand during Tuesday. An associated frontal system is likely to bring a period of heavy northeasterly rain to northern and central parts of the North Island, along with east to northeast gales. The heaviest rain is forecast from Northland to Bay of Plenty and northern Gisborne, and southwards to Tongariro National Park and Mount Taranaki, where there is moderate confidence of warning amounts of rain. Brief easterly rain brings a low risk of warning amounts during Tuesday from southern Gisborne to Wairarapa,as depicted on the chart.
As the frontal system moves southwards across the North Island, there is moderate confidence of east to northeast gales becoming severe for a time over western and central areas from Auckland to Kapiti, and over Nelson and Buller. The risk of severe gales reduces over Taupo and eastern Bay of Plenty.
As the low and frontal system moves onto central New Zealand during Tuesday, there is moderate confidence of warning amounts of rain for Marlborough and Nelson, easing into Wednesday. In addition, a period of westerly gales are possible for the lower North Island as the low moves past, and forecasters will monitor this.
During Wednesday, the low should move away to the east of the South Island, followed by a ridge of high pressure on Thursday.
http://www.metservice.com/warnings/seve ... er-outlook
Re: Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Mon 31/08/2015 06:45
by David
a bit misty this morning, can hear fog horns in the distance... Must be ferries at Half Moon Bay
Re: Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Mon 31/08/2015 07:08
by Richard
Surely this system can finally bring some rain to the drought areas of North Canterbury, fingers crossed.
Re: Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Mon 31/08/2015 07:22
by NZstorm
Warm front moving onto Auckland now with a decent spell of rain this morning. Precip should ease after midday and return later. The cold front comes through early tomorrow morning with potentially some very heavy rain and non zero thunder risk. Also whenever you have moist air moving south you have the risk of a localised tornado.
Re: Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Mon 31/08/2015 07:25
by Nev
David wrote:a bit misty this morning, can hear fog horns in the distance... Must be ferries at Half Moon Bay
Still pockets of low fog around here this morn. Most of last night looked like a combination of fog and light drizzle, which looked a bit weird under the full moonlight. Exactly 10mm here since late Saturday.
Re: Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Mon 31/08/2015 07:49
by spwill
The Auckland dewpoint yesterday was around 15C so not much cooling required for fog, min temp overnight around 13C.
Re: Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Mon 31/08/2015 07:54
by Manukau heads obs
'non zero thunder risk'
love it, LOL
Re: Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Mon 31/08/2015 18:02
by David
Only 13mm so far, doesn't seem to be as bad as forecast yet.
Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Mon 31/08/2015 18:11
by jamie
David wrote:Only 13mm so far, doesn't seem to be as bad as forecast yet.
Its supposed to be tonight.
Bang on forecast here so far.
Re: Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Mon 31/08/2015 18:45
by NZstorm
Manukau heads obs wrote:'non zero thunder risk'
love it, LOL
A round about way of saying low risk.
Latest midday modelling suggests NO thunder. The forecasting rule of thumb for thunder is convection tops must reach -20C and the cloud depth be atleast 3km. That requirement likely wont be met tomorrow morning but could happen Wednesday!
Re: Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Mon 31/08/2015 22:18
by Chris Raine
Winds have been steadily increasing on the West Coast this afternoon and this evening .The severe easterly gales are due to begin midnight . Emergency, services and Civil Defence on standby. getting generators into key areas if required
Re: Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Mon 31/08/2015 22:21
by Manukau heads obs
25mm today here...eased alot for now...more on the way I see
Re: Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Tue 01/09/2015 08:05
by spwill
Some heavy showers to come through next hr or two before our weather brightens, a warm low of 14C overnight, 16mm at Greylynn since midnight
Re: Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Tue 01/09/2015 08:11
by SnwAddct
Torrential rain here in west Auckland..
Re: Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Tue 01/09/2015 08:25
by Richard
Had a few spots so far, not looking like we will get much...again.
Re: Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Tue 01/09/2015 08:40
by NZstorm
Tropical downpour in Grey Lynn.
Re: Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Tue 01/09/2015 09:18
by Orion
In Auckland: "Emergency Services have now CLOSED Tamaki Drive from Ngapipi Road due to surface flooding and high tides..."
from
http://cdem.co/viewer.jsp?token=6sL9N6sc
Re: Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Tue 01/09/2015 09:50
by NZstorm
I see Ricky had 47mm last 24hrs. I got 53mm.
Re: Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Tue 01/09/2015 10:01
by jamie
I'm up to 37mm from this event with another downpour yet to come by the looks.
Re: Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Tue 01/09/2015 10:17
by David
Only 34mm for the event here, nothing particularly heavy in Howick this morning.
Re: Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Tue 01/09/2015 10:21
by David
Yeah, the traffic was the worst I have ever seen this morning. Left 7.40am, turned around at 9.10am and came back home to work from home. I'm glad I did because my commute does include Tamaki Drive!
Re: Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Tue 01/09/2015 10:32
by spwill
Got the downpour here before 9am
Re: Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Tue 01/09/2015 11:07
by Manukau heads obs
47mm here as well in total
There is now a lake at the bottom end of the valley here
Re: Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Tue 01/09/2015 13:05
by Chris Raine
Gusty easterly in Buller and Greymouth .The rain bearing front has now slipped into Central and south Westland
Re: Heavy rain & strong winds 31 Aug - 2 Sep
Posted: Tue 01/09/2015 13:27
by Tornado Tim
Quite a bit of heavy rain in Raglan,
SH23 as a result is closed due to flooding across the divy. Not good. Hopefully it will open later on today.....