Thunderstorms, Upper NI, Sept 28th-30th

ricky · Unread post by **ricky** » Mon 28/09/2009 11:30

Hmm, reports of lots of roofs off in an area near Ramarama.. I assume it happend on the back end of the Cb line but the Fire Service have just been called to the area...

ricky · Unread post by **ricky** » Mon 28/09/2009 11:34

Actually we did have a large wind gust at 11:17, 63 km/hr here, I wonder what was going on there?

Willoughby · Unread post by **Willoughby** » Mon 28/09/2009 12:13

Persistent light to moderate rain here in Karori with light winds. Going off the radar, heavier falls look to be streaming down from the north towards the strait over the next couple of hours.

Manukau heads obs · Mon 28/09/2009 12:34

nice CB line out to my SW, moving towards south kawhia area

jamie · Unread post by **jamie** » Mon 28/09/2009 12:48

Im in Hamilton. Was in town when it all came through. Heard about 5 rumbles of thunder and had torrential rain. Back at my parents water is running off the paddocks.

Dale · Unread post by **Dale** » Mon 28/09/2009 14:31

http://www.nzherald.co.nz/nz/news/artic ... d=10600082

Herald saying it was a nader that hit Ramarama.. definately on the back edge of that storm that came over, it got pretty wild here for a period with total whiteout rain conditions & surface flooding around.. wouldnt surprise me if it really was one.

Vertigo · Unread post by **Vertigo** » Mon 28/09/2009 14:41

yes, that particular Cb was nasty looking, i remember noting that it was visibly unstable looking underneath as it passed over greenlane.

Michael · Unread post by **Michael** » Mon 28/09/2009 15:05

Sky hazy again must be more dust,sultry 20c now!

spwill · Unread post by **spwill** » Mon 28/09/2009 15:10

Sky hazy again must be more dust,sultry 20c now!

Yes, muggy for the time of year, 19C, dewpoint 15C
A towering Cu line crossed Auckland last hr or two with a few showers and is moving away out to the east,some Cbs have formed on that line down Waikato way but nothing thundery yet.

jamie · Unread post by **jamie** » Mon 28/09/2009 15:22

far out we just got pummeled by some serious rain here at my parents. Was certainly being chucked down at a rate. Very quick 10mm making 24.8mm for the day since 9am. Rain rate just got to 2.3mm/h not long ago.

Tornado Tim · Unread post by **Tornado Tim** » Mon 28/09/2009 15:57

Stuff.co.nz is reporting a tornado ripping off a roof in Ramarama Auckland!
Link here: http://www.stuff.co.nz/national/2910409 ... kland-home

Manukau heads obs · Mon 28/09/2009 16:02

been talking to my brother....he is only 1.5km away !
he said he had rain coming in torrrents.....recorded 26 knots of wind (lots of trees around) but did not know about a small tornado just up the road!
it sure looked black out to east of here at the time!

the sky does have an orange tinge to it here when looking towards the west and near the sun...

Dale · Unread post by **Dale** » Mon 28/09/2009 16:34

Can vouch for the dust, did the same thing in oz, blew over with the change. Only difference from the other day is I can actually taste it this time

Sure was a whopping amount of rain coming down this morning, wave after wave of torrential coming down turning the paddocks full of water and gouging out the driveway down there about 1/2 inch deep. Visibility next to zero at the time.

Manukau heads obs · Mon 28/09/2009 16:42

we might get a good orange sunset

David · Unread post by **David** » Mon 28/09/2009 17:04

On the way into uni this morning, hit torrential rain in Newmarket just after 9am, I also observed a very heavy downpour at Auckland uni around 9.40am. Typically weakened as it headed east, as I came home and not even 4mm recorded.
Hopefully will see a thunderstorm tomorrow, haven't had a decent one for months here

rawdon · Unread post by **rawdon** » Mon 28/09/2009 17:10

Upper Hutt ... 1700hrs NZDT ...

Front well and truely passed now to the east 10mm rainfallin recent hours .. .ppp 1000mb and very slightly rising .. .winf nnw ... sky is very stratiform with clearing orographic low coud... Very Katabatic in apprearance ... The colder more unstable airmass will approach from the NW tomorrow from the almost cut off low in the Tasman .. with showers and fine spells I expect. The classic frontal systems dont appear here very often ... Latitude is far too low.

Steve

Manukau heads obs · Mon 28/09/2009 17:49

watched good footage of the house that lost the roof from the small tornado in ramarame on prime news

ricky · Unread post by **ricky** » Mon 28/09/2009 18:03

Just been for a drive to have a look at Ramarama.. Interesting damage trail about 40m wide and ~ 1km long, branches stripped off many trees and several uprooted, no damage to powerlines, some roofing off and wrapped around trees over the road... Now I didn't see the house that lost it's whole roof so it's possible there was another area of more severe damage! Should be good 6pm news coverage TV3 and 1

Manukau heads obs · Mon 28/09/2009 18:23

Tv3 had good coverage...I missed the TV1 coverage
tv3 quoted M/S as saying it would have been a down burst
was there evidence of rotating winds Ricky?

Tornado Tim · Unread post by **Tornado Tim** » Mon 28/09/2009 19:26

Possible Severe thunderstorms are predicted tomorrow, A sunny morning is expected too, if this proves true the temps may get past 20Â°C and this will help if any T-storms start occurring.
The "hot" hours are 2 PM and 4 PM. LI is expected reach a whopping -8.6 at 2 PM.
This a very impressive day to come, DP is expected to be around 14-17Â°C and this will help with the moisture content.
The forecast is subject to change but it is a notable day.
I have attached a Skew-T for reference, looks nice!
Skew-ts and forecasts update here http://wx-matangi.dyndns.org/Matangi_We ... ecast.html at 3AM, 6 AM, 9 AM, 12 AM, 3 PM, 6 PM and 10 PM.

spwill · Unread post by **spwill** » Mon 28/09/2009 19:27

tv3 quoted M/S as saying it would have been a down burst

I have just been down to Ramarama, looked very much like Tornado damage.

Michael · Unread post by **Michael** » Mon 28/09/2009 19:29

They used your favourite word once only.

Manukau heads observer wrote:...I missed the TV1 coverage

spwill · Unread post by **spwill** » Mon 28/09/2009 19:38

Corrugated iron in the tree on the right

Andrew Massie · Unread post by **Andrew Massie** » Mon 28/09/2009 19:40

No, I'm sorry, it wasn't a tornado.. TV1 said it was a mini-tornado, so everybody's wrong! OMG.

Manukau heads obs · Mon 28/09/2009 20:11

yup, thats a tornado alright I reckon

(branches thrown around, narrow path,etc etc)
also a house had the roof taken clean off (2 story house)

NZ Weather Forum

Thunderstorms, Upper NI, Sept 28th-30th

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