Very Active Front, Upper N.I. - Sep 19

NZstorm · Unread post by **NZstorm** » Sun 18/09/2011 11:43

Looking ahead to tomorrows (Mondays) system, there is an area of lightning in the southwest Tasman now. This system develops a warm sector which means there will be a tornado risk with it! Looks like a thunder risk from Taranaki northward with 13-14c dewpoints onto Northland as far south as Auckland in the afternoon. GFS has been showing some quite good instability numbers over Northland with the more humid air there. Have to see how this system develops.

Manukau heads obs · Sun 18/09/2011 11:49

cool..I am on a school trip, camp for the week at wangaporoa penininsular...good spot by the sounds of it to be tomorrow.

Vertigo · Unread post by **Vertigo** » Sun 18/09/2011 18:22

very nice active low in the tasman

Tornado Tim · Unread post by **Tornado Tim** » Sun 18/09/2011 22:05

Lots of Lightning activity in the Tasman atm

David · Unread post by **David** » Sun 18/09/2011 22:08

Metservice have tomorrow afternoon's main instability slightly further north in this evenings update, high risk Northland, low risk for all of Auckland

Manukau heads obs · Mon 19/09/2011 06:20

picking up alot of lightning in this next front

jamie · Unread post by **jamie** » Mon 19/09/2011 09:41

New topic for this afternoon?
I really like the looks of the front. Its really building and heaps of strikes. MS thunderstorm outlook looks nice too.

Tornado Tim · Unread post by **Tornado Tim** » Mon 19/09/2011 10:08

Keep an eye on Alans Lightning Detector tonight this arvo, it will be right in the thick of it

Here is the current Sat image and Lightning from WWLN and Weatherzone.

jamie · Unread post by **jamie** » Mon 19/09/2011 10:12

number of strikes is building too

spwill · Unread post by **spwill** » Mon 19/09/2011 10:37

Looks a great Front

I might even go for a drive north later.

We may get some heating ahead of the Front here, currently overcast and 14C, dp 10C

tgsnoopy · Unread post by **tgsnoopy** » Mon 19/09/2011 10:37

Oh man, I so feel like going for a long drive.

Vertigo · Unread post by **Vertigo** » Mon 19/09/2011 10:46

Wish I could chase too! Stuck in an office instead

bmo · Unread post by **bmo** » Mon 19/09/2011 10:53

Wishing i was home now looking from the hill towards the Kaipara Harbour entrance....

gllitz · Unread post by **gllitz** » Mon 19/09/2011 11:23

That band of muck-n-guck heading toward the NI looks to be NASTY...has just been growing and growing with each radar pass!

bmo · Unread post by **bmo** » Mon 19/09/2011 11:44

Really wish i was home now or driving North....the rain radar and lightning detector look intense, people there are in for a rough ride!

Tornado Tim · Unread post by **Tornado Tim** » Mon 19/09/2011 12:01

Metservice better be looking at the velocity scans as this comes in, these types of active fronts have the potential to put down tornadoes.

Also of note my boltek and others in the NI are detecting a large proportion of CG's which is the lightning type that poses the most danger.

jamie · Unread post by **jamie** » Mon 19/09/2011 12:08

bugger it for being so far north. lightning is only going to hit west coast north of Kaipara harbour entrance and thats it!

1450 strikes in the past 2 hours. not a bad count hahaha.

Tornado Tim · Unread post by **Tornado Tim** » Mon 19/09/2011 12:16

This line has a good outflow boundary or gust front with it, take pictures when it comes in it should show some good structure

The outflow boundary is the first small line before the actual front.

I wont be surprised if the gusts when it comes in exceed 90km/hr....

spwill · Unread post by **spwill** » Mon 19/09/2011 12:23

Looks like about Dargaville north for the big lightning show, perhaps some storms can fire down our way as the front moves over warmed land.

NZstorm · Unread post by **NZstorm** » Mon 19/09/2011 12:39

perhaps some storms can fire down our way as the front moves over warmed land.

I think that should happen.

Nev · Unread post by **Nev** » Mon 19/09/2011 14:36

I see MetService updated their Severe Thunderstorm Watch not long ago. Earlier this morn it was just for the Far North, but now includes a high risk of squally thunderstorms with the risk of one or two damaging tornadoes extending all the way down to northern Auckland for this arvo.

littleheaven · Unread post by **littleheaven** » Mon 19/09/2011 14:48

Stuck in the office here in Takapuna *sigh* Looks pretty dark to the north but so far no action that is visible/audible through the walls of the building.

David · Unread post by **David** » Mon 19/09/2011 15:17

Front has arrived here, gentle light rain. Maybe would have been more interesting if we had reached 17 or 18 degrees today?

spwill · Unread post by **spwill** » Mon 19/09/2011 15:28

Yes, the action is north of the city.

bmo · Unread post by **bmo** » Mon 19/09/2011 16:12

Got around 9mm from that front here.

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Very Active Front, Upper N.I. - Sep 19

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