North Island Cold Pool- 18th April

Michael · Unread post by **Michael** » Mon 18/04/2011 11:13

Love to know the speed here,38kmh Daves one probably 1/2 that

bmo · Unread post by **bmo** » Mon 18/04/2011 11:15

Winds are gusting at around 45km/h here with the highest gust so far at 51.5km/h

David · Unread post by **David** » Mon 18/04/2011 11:22

Michael wrote:Love to know the speed here,38kmh Daves one probably 1/2 that

Yes it's not strong here at all, not even SW in fact. Average 250Â° bearing. Showers have eased significantly since last night.

Michael · Unread post by **Michael** » Mon 18/04/2011 13:01

A very portion of the fall since sometime during last night till now and 100% of everythings like this.

RODALCO · Unread post by **RODALCO** » Mon 18/04/2011 13:12

Amazing lightning flash at about 0958 hrs
I watched it from Hepburn substation, looking direction Glendene.
Todays job cancelled for the painters.
Also some good heavy rain and some hail. That front didn't last long
Now monitoring weather from Sunset Rd

David · Unread post by **David** » Mon 18/04/2011 14:57

Boom of thunder here just now. Dark cloud approaching...

spwill · Unread post by **spwill** » Mon 18/04/2011 15:02

Yes, heard that thunder here from a Cb over East Auckland way, some big wind gusts coming through with the showers today.

David · Unread post by **David** » Mon 18/04/2011 15:07

spwill wrote:Yes, heard that thunder here from a Cb over East Auckland way, some big wind gusts coming through with the showers today.

It gave 0.2mm rain and gusts to 64kph as it passed over. Quite squally.

spwill · Unread post by **spwill** » Mon 18/04/2011 15:09

Took this photo of a Cb earlier in the day.

Nev · Unread post by **Nev** » Mon 18/04/2011 15:32

Very blustery out here with a mix sunshine and the odd heavy shower.

Some MetService mean-winds at 3pm:
80km/h - Cape Reinga
83km/h - Tiritiri Matangi
69km/h - Waitemata Harbour
72km/h - Manukau Heads
54km/h - Auckland Aero

Michael · Unread post by **Michael** » Mon 18/04/2011 16:48

Dont know if theres been thunder,the trees are deafening outside,more garbage tan septembers blow due to trees as they were still bare then.

NZstorm · Unread post by **NZstorm** » Mon 18/04/2011 16:55

Boom of thunder here just now. Dark cloud approaching...

I saw the lightning bolt from that David and got thunder a couple of seconds later. I was at Panmure.
Had big gusts and heavy rain.

The upper air was not unduly cold over Auckland today, 500mb -19C, so why the thunder? I think the jet stream over Auckland provided additional lift which allowed the weak storms to develop.

jamie · Unread post by **jamie** » Mon 18/04/2011 17:01

Nev wrote:Very blustery out here with a mix sunshine and the odd heavy shower.

Some MetService mean-winds at 3pm:
80km/h - Cape Reinga
83km/h - Tiritiri Matangi
69km/h - Waitemata Harbour
72km/h - Manukau Heads
54km/h - Auckland Aero

even i recorded 74km/h max wind gust

Nev · Unread post by **Nev** » Mon 18/04/2011 17:26

3pm Metars have Akld Aero with 59 km/h winds, 83 km/h gusts (a ltittle higher than MS Obs

).

Manukau heads obs · Mon 18/04/2011 18:35

stopped with snow falling on the desert road
was dark like night time nearly while it was snowing
snow showed up on the ground just north of Taihape

Tornado Tim · Unread post by **Tornado Tim** » Mon 18/04/2011 18:42

Manukau heads obs wrote:stopped with snow falling on the desert road
was dark like night time nearly while it was snowing
snow showed up on the ground just north of Taihape

Awesome Brian, if was down there i would do the same thing

Dale · Unread post by **Dale** » Mon 18/04/2011 22:23

Love your work Brian

jamie · Unread post by **jamie** » Tue 19/04/2011 06:29

hmmm just north of Taihape you say? awseome! im down in taihape for easter!!!

Manukau heads obs · Tue 19/04/2011 06:57

yup, as soon as you got to the top of the hill just north of Taihape
eveything was white
but it was raining there, while we were there (bordering on sleet), so it was not going to last long

I was pleased with our timing getting the snow shower at the top of the desert road that we got

tgsnoopy · Unread post by **tgsnoopy** » Tue 19/04/2011 07:39

Manukau heads obs wrote:yup, as soon as you got to the top of the hill just north of Taihape
eveything was white

Hmm, using local knowledge (I lived in Taihape at one point) I'm picking that hill was probably the Turangarere Hill Deviation where it climbs from around 500m to 700m

Manukau heads obs · Tue 19/04/2011 07:50

its a big climb alright!

metpete · Unread post by **metpete** » Tue 19/04/2011 08:25

Nev wrote:3pm Metars have Akld Aero with 59 km/h winds, 83 km/h gusts (a ltittle higher than MS Obs ).

Automatic recorded 200 degrees 29 gusting 45 knots at 3pm while ATCs metar (reported a few minutes earlier) was 220 degrees 32 gusting 45 knots. The peak gust recorded by the aerodrome automatic was 49 knots in the hour to midday.

Manukau heads obs · Tue 19/04/2011 08:39

I got 53 knot max gust (and around that 33 knot 10 minute average) just before 11am yesterday, so that tallies with the Airport nicely
looking at my graph data

what was the max speed recorded at the Manukau Heads yesterday?

metpete · Unread post by **metpete** » Tue 19/04/2011 09:04

Manukau heads obs wrote: what was the max speed recorded at the Manukau Heads yesterday?

max gust 90 knots, max 10 minute mean speed 46 knots

Manukau heads obs · Tue 19/04/2011 09:12

I thought I heard a report of 170kmh from the Manukau heads
wow!
that must have been some squall then!
it was WSW in the morning, which does funnel nicely in the heads and there is a big up slope acceleration over the top of the hill with any westerly in the direction!
90kts is the highest speed the heads have had for some years

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