NZ Weather Forum

And another video of the Tornado off Ohope Beach (Meteorologist friend has confirmed it was a tornado not a waterspout).

Link to Facebook Video

And another *Warning Language*

Link to Facebook Video

Another

Looks like both tornadoes did a bit damage to several houses. Couple more videos in the Herald and Stuff of the Taranaki tornado taking out power lines and tossing roofing iron, etc in the air…

https://www.nzherald.co.nz/nz/news/arti ... d=12110348

https://www.stuff.co.nz/national/106424 ... w-plymouth

Incredible!!! That Ohope one looked very strong!

ACCESS-Regional modelled soundings at New Plymouth show enough CAPE and great veering towards the surface at eastern BoP with surface north-northeasterlies. Amazing speed shear too - 150 knots in the jet stream.

New Plymouth: Ohope:

The BOP tornado must have some great Doppler radar images. It looks like F2 or even F3. Then again because it’s over water it could be making it looks bigger. I wonder what if a MetService person on here could share some images?


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Post on their Facebook wall, state a time. They reply to every comment on there.

A great looking tornado/waterspout at Ohope, some nice footage showing up.


Not much rain here today, we had a heavy shower tonight with the front and one distant rumble of thunder.

Good videos of the tornados.
Look very much like the Greymouth tornado many years ago.
I'm not surprised of the event happening as the current situation looks very much like tornados or waterspouts would develop in the usual areas ie Taranaki/BOP.
The high cloud moving south this afternoon had a bit of instability in it, mammatus forms but there was this distinct funnel shape that came out of it looking east from here. I didn't take a photo, sadly.

In the meantime until/if metservice posts the high res images here's some of the 120km images from the MS website.
Images from 2018-08-20-1352 to 2018-08-20-1845 can be downloaded here: https://mega.nz/#!xBgxWZya!e6UGkrXSxH2G ... TD-ZUggipA

Despite inferring the estimated 20 metre wide BoP tornado was somehow miniature, SunLive also reported that it struck the Holiday Park near the end of Ohope Spit at 5:47pm. And RNZ reported that the Taranaki tornado hit New Plymouth about an hour earlier at 4:50pm.

Latest reports are that at least 6 properties were damaged in Ohope and about 11 houses lost their roofs in New Plymouth.

Looking like a polar jet streak aimed at the upper North Island tomorrow where surface dewpoints will be 10-11C. Expect thunder with squally winds for Northland/Auckland. Have to see how this set up evolves, instability may be marginal.

Nev wrote: ↑Tue 21/08/2018 07:10 Despite inferring the estimated 20 metre wide BoP tornado was somehow miniature, SunLive also reported that it struck the Holiday Park near the end of Ohope Spit at 5:47pm. And RNZ reported that the Taranaki tornado hit New Plymouth about an hour earlier at 4:50pm.

Latest reports are that at least 6 properties were damaged in Ohope and about 11 houses lost their roofs in New Plymouth.

Hahahaha Sunlive used the m word

There's nothing miniature about that tornado!

Weather the last couple days hasn't been all the bad, much more settled than expected... just a handful of brief showers here and there

Nice wee CB form going up behind the 4 Peaks/ Mt Peel area at the moment.
Some photos from yesterday.

NZ Thunderstorm Soc wrote: ↑Tue 21/08/2018 16:10 Nice wee CB form going up behind the 4 Peaks/ Mt Peel area at the moment.

Looks good from here too

I have requested velocity radar images from the MetService but received a strange response on their Facebook wall.

You can see it here:
https://www.facebook.com/MetService/pos ... 8248554890

Moderate to heavy rain here at the moment

Currently isolated thunderstorms are occuring over Northland.

Thunder to SW!

Some loud thunder booms here out of the southwest

Yep just heard a good rumble in Howick just now... looks like it stays in South Akl though

Storm cell passed close to here so I went for a drive, lightning/ thunder observed, hail on the ground at Mangere Bridge which I measured, stones up to 1.5cm size .

Heard a rumble or 2 here but missed the main action. More to come though this afternoon and evening....

Just performed my change of season health check:

Currently stratospheric polar vortex looking very tight and strong

https://earth.nullschool.net/#current/w ... 100.84,347


>GEFS has a peaking of the upcoming sudden stratospheric warming in the upper stratosphere over Antarctica around 70S 140E due in 60 hours.

>Large pressure anomaly appearing 2 days later at the same height and similar location.

>Surface of Antarctica now getting colder with a strong tropospheric polar vortex in place.

I’m now on full alert for zonal downward mixing and changes to the jet streams. Once this gets underway, I would expect upper cold core cyclones to penetrate into the mid latitudes across the southern hemisphere in late August to early September connecting with subtropical moisture. EC starting to hint this around OZ, with the synoptics looking volatile.

Next batch of popcorn has been served