NZ Weather Forum

re New Plymouth deluge.
Did Met Service issue a warning? There radar will have detected the event occuring which will have triggered the warning process.

Very pleasant day for Auckland with 24C. Localised heavy showers over South Auckland currently.

jhaylock wrote: ↑Wed 21/03/2018 13:05 The Taranaki Regional Council site at Brooklands Zoo (about 1km south of the City Centre) recorded 74mm of rain between 6.45 and 7.45 (see the attached file). This is exceptionally heavy rain - I think the NZ record is about 109mm in an hour.

That's a fairly torrential isolated downpour all right!

NIWA don't have a 30 minute rainfall record, but Tauranga holds the 10 minute record of 34mm, and the hourly record is 134mm recorded at 'Cropp at Waterfall' inland and south of Hokitika (Cropp at Waterfall and nearby Prices Flat also hold every other NZ rainfall record).

MS posted this Taranaki 12 hr radar rainfall accumulation graphic to 2pm today saying, 'over 82mm recorded near the city between 7am-9am'...

There was a lot of lightning activity last night in the Tasman Sea.
Would that of contributed to the New Plymouth downpour?

There was just some very good radar imagery of the event on the TVNZ weather report just before 7pm.

The five minute breakdowns at the Brooklands Zoo site for the downpour were:

6.30am 1.5mm
6.35am 0.5mm
6.40am 1.5mm
6.45am 8.0mm
6.50am 8.5mm
6.55am 5.5mm
7.00am 8.0mm
7.05am 9.5mm
7.10am 6.5mm
7.15am 9.5mm
7.20am 7.5mm
7.25am 3.5mm
7.30am 3.5mm
7.35am 2.0mm
7.40am 2.0mm
7.45am 0.5mm
7.50am 1.0mm
7.55am 1.0mm
8.00am 2.5mm
8.05am 1.0mm
8.10am 2.0mm
8.15am 3.0mm
8.20am 1.5mm
8.25am 2.5mm
8.30am 0mm

Maximum intensities were:
5min 9.5mm
10 min 17.5mm
20 min 33.5mm
30 min 47.5mm
One hour 74.0mm
Two hours 92.5mm

Did MS issue a warning?
I think we all know the big weather events come without warning.... cue Esk Valley HB, New Plymouth, Waimarama 2011 770mm in 24hrs, Bola, Giselle, my experience is that the media and MS 'beat ups' never materialise... cue Hola as a recent example.

Nev wrote: ↑Wed 21/03/2018 18:09Tauranga holds the 10 minute record of 34mm

Nev, do have an easily accessible record with the where and when details? Would'n't surprise me if that was the May 2005 event, we got drowned at home.

^ Yep, NZ's Climate Extreme records are posted on NIWA's website linked below…
https://www.niwa.co.nz/education-and-tr ... te/extreme


The 34mm in 10 minutes was recorded at Tauranga Aero on April 17, 1948 (228mm for the day!).

Cold over the lower South Island this morning with inland locations showing 7C and rain. Will be some snow in the ranges.

Chilly compared to this time yesterday, some good rain overnight though 16mm

Looks like central Otago had a very cold day with Wanaka sitting on 6-7C all day.

Fine today in Auckland with 24C. Showers tomorrow, thunder possible late in the day. Weak upper winds suggest lightning activity will be weak.

Only 9-10C all day in chch, I see qtown is only 3.8C now at 7pm

Sent from my Redmi Note 4 using Tapatalk

And Queenstown on 4C at 2pm... must be very unusual for the time of year?

David wrote: ↑Thu 22/03/2018 19:37 And Queenstown on 4C at 2pm... must be very unusual for the time of year?

Webcam shows a dusting of snow not just on the Remarkables, but also on top of hill front of them (Kelvis Heights - about 800m high)

Some isolated torrential falls in the far north today. Pukenui PWS is showing 61mm in the last hour! https://www.wunderground.com/personal-w ... =IKAITAIA2

Hey Auckland spies- hows it looking for the cricket at 2pm?

Let's hope that it rains for the next four days!! Otherwise it could all be over within two days if the Black Caps make a bold declaration.

Expecting a mix of sunshine and showers here next few days with the trough crossing, afternoon and evening most at risk for showers, clearing conditions Sunday. I live near Eden Park, 1 shower already here today.

spwill wrote: ↑Fri 23/03/2018 12:14 Expecting a mix of sunshine and showers here next few days with the trough crossing, afternoon and evening most at risk for showers, clearing conditions Sunday. I live near Eden Park, 1 shower already here today.

I fear that's a forecast for Mr Root, not Mr Williamson

Razor wrote: ↑Fri 23/03/2018 12:34

spwill wrote: ↑Fri 23/03/2018 12:14 Expecting a mix of sunshine and showers here next few days with the trough crossing, afternoon and evening most at risk for showers, clearing conditions Sunday. I live near Eden Park, 1 shower already here today.

I fear that's a forecast for Mr Root, not Mr Williamson

A 5 day test seems very unlikely after yesterday

Convergence occurring over the Northland-Waikato area, with heavy rain building in some areas. Looks like thunder.

That rain cell moving in to Auckland from the NE has the looks of a possible thunderstorm...

And there it is! Rumbling thunder

Heard that rumble too. Heavy rain here. 8mm shower so far.

Heard here as well....its been a long time between rumbles.