General April Weather

NZstorm · Unread post by **NZstorm** » Sun 26/04/2015 21:06

Manukau heads obs wrote:latest met service thunderstorm outlook ramped up

The 500mb trough is potent with 500mb jet 70-80knots! Systems this strong tend to come with a punch and I suggest high risk thunder for Taranaki/upper South Island.

Hopefully we can catch thunder in Auckland.

Dean. · Unread post by **Dean.** » Sun 26/04/2015 21:19

Possible heavy rain for Canterbury from Monday afternoon onwards....

Tornado Tim · Unread post by **Tornado Tim** » Mon 27/04/2015 00:11

Certainly some squally storms out to sea atm.....
Lightning detector quite active over the past 48 hours or so.....

Nev · Unread post by **Nev** » Mon 27/04/2015 06:46

NNE'ers really ramping up out here. Gusting up to 98 km/h (53 kt) at Tiritiri this morn and I think around 90 km/h for Whangaparaoa.

Yeah, MS's extensive tornado risk for late today is interesting…

MetService - Thunderstorm Outlook

Valid to: Midnight Monday 27 Apr 2015
Issued at: 8:14pm Sunday 26 Apr 2015

The front is expected to move eastwards across the North Island during Monday afternoon and evening, accompanied by broad areas of rain, strong northerly winds, and embedded squally thunderstorms. Severe Weather Warnings and Watches are in force.

There is a moderate risk of thunderstorms with this front from Northland to Waitomo, and across to Bay of Plenty and northern Gisborne, during the afternoon and evening. Heavy rain and strong squally wind gusts of 90-110km/hr are likely to accompany these thunderstorms, and the chance of one or two small tornadoes mainly near the coast. This may cause localised wind damage.

From late afternoon through to night, there is a further risk of a few thunderstorms about Waitomo and Taranaki, Horowhenua to Wellington, and about the northern South Island from the Marlborough Sounds to Buller as indicated on the chart. These thunderstorms will mostly be accompanied by heavy rain, and possible strong wind gusts of 90 to 110 km/h from Wellington northwards.

A broad low risk of thunderstorms covers many other northern and western parts of both the North and South Islands as indicated the chart.

MetService T-Storm Outlook Map - Apr 27, pm.png

P.S. Looks like there's already some power outages around Waiheke...

Nev · Unread post by **Nev** » Mon 27/04/2015 07:32

Tiritiri now exceeding forecasts with gusts to 106 km/h (57 kt), Whangaparaoa around 96 km/h…

Manukau heads obs · Mon 27/04/2015 07:51

Very exposed at Tiri though, with the way the island is shaped, it ramps up the windspeed
i.e so expect windspeed there 10 kts higher than forecast

Nev · Unread post by **Nev** » Mon 27/04/2015 07:58

Pretty exposed to the Northerlies here also. Our freshly laid mulch has been pelting the windows, lol. Great surf in Oneroa Bay. Wouldn't want to be on the ferry this morn.

Manukau heads obs · Mon 27/04/2015 08:05

the marine forecast is for gusts to 55 kts in the Gulf though

tgsnoopy · Unread post by **tgsnoopy** » Mon 27/04/2015 09:31

Thunderstorm Outlook

Valid to: Midnight Monday 27 Apr 2015

Issued at: 9:09am Monday 27 Apr 2015

A front is expected to move east across the North Island this afternoon and evening, accompanied by broad areas of rain, strong northerly winds, and embedded squally thunderstorms. Severe Weather Warnings and Watches are in force.

There is a moderate risk of thunderstorms with this front from Northland to Waitomo, and across to Bay of Plenty and northern Gisborne, during the afternoon and evening. Heavy rain and strong squally wind gusts of 90-110km/hr are likely to accompany these thunderstorms, and the chance of one or two small tornadoes mainly near the coast. This may cause localised wind damage.

From late afternoon there is a further risk of a few thunderstorms about Waitomo and Taranaki, Horowhenua to Wellington, and about the northern South Island from the Marlborough Sounds to Buller as indicated on the chart.These thunderstorms will mostly be accompanied by heavy rain, and possible strong wind gusts of 90 to 110 km/h from Wellington northwards.

A broad low risk of thunderstorms covers many other northern and western parts of both the North and South Islands as indicated the chart.

Over the south and east of the South Island there is no risk of thunderstorms or significant convection.

756c-14cf975f700-14cfabf8e00-14cf78ffc6f.0.png

Nev · Unread post by **Nev** » Mon 27/04/2015 10:06

Yes, basically a 'carbon-copy' of last night's T-storm Outlook for today…

Nev · Unread post by **Nev** » Mon 27/04/2015 10:47

Gusts at Tiritiri now up to 115 km/h (62 kts), and the Waitemata's Bean Rock up to 102 km/h (55 kt)…

David · Unread post by **David** » Mon 27/04/2015 10:49

Looks like a wet several hours ahead. NE only gusting around 50 km/h here. Windy yes, but nothing unusual

Nev · Unread post by **Nev** » Mon 27/04/2015 11:37

Strong winds have brought down signs and blown out glass in Akld City this morn…

'Weather: Wild winds batter Auckland' - NZ Herald

jamie · Unread post by **jamie** » Mon 27/04/2015 12:21

Lost power here. Not sure whether a car crash or tree falling as to the cause. My station is beeping away due to winds higher than 64 km but max gust only 72km so far. So nothing to write home about.

Manukau heads obs · Mon 27/04/2015 13:16

interestingly now that the rain bands have moved through here...we have not had a NW wind change yet
although it is now more N wind now
the next front associated with the low could become more active as it approaches?

spwill · Unread post by **spwill** » Mon 27/04/2015 13:23

Had lunch at St Heliers today, stormy weather on my drive along Tamaki Drive at lunch time, a couple of photos.

Manukau heads obs · Mon 27/04/2015 13:33

that's a bit more than a few deck chairs blown over

NZstorm · Unread post by **NZstorm** » Mon 27/04/2015 14:19

27mm in Grey Lynn today. Quite muggy with dewpoint on 19C.

spwill · Unread post by **spwill** » Mon 27/04/2015 14:46

Some towering Cu around now, sun is out and feeling tropical with 19C dewpoint

littleheaven · Unread post by **littleheaven** » Mon 27/04/2015 14:49

Sunny and calm in Glenfield at the moment after a very wet morning. Can see beefy CU to the East though.

Manukau heads obs · Mon 27/04/2015 14:58

wind has swung NW now here
20C here too

David · Unread post by **David** » Mon 27/04/2015 15:40

spwill wrote:Some towering Cu around now, sun is out and feeling tropical with 19C dewpoint

Indeed - I decided to go for a 20 minute walk just after 3pm and it didn't take long to start sweating

Hadn't been expecting such an early clearance. We got 17mm in Howick.

Richard · Unread post by **Richard** » Mon 27/04/2015 15:42

Finally some heavy rain here, will it last long enough to be of any benefit in breaking the drought

Bradley · Unread post by **Bradley** » Mon 27/04/2015 16:53

22mm here in West Melton in an hour and a half - heaviest rain in such short a time in at least 2 years!

Richard · Unread post by **Richard** » Mon 27/04/2015 18:00

Looks heavy down your way going by the radar,the radar is not showing how heavy it is here though

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