General May Weather

NZ Thunderstorm Soc · Sun 30/04/2023 18:13

Looks as though it might be a fine and settled start for May here, but with a bit of rain up north and over to the west as a trough slips south around a blocking high centred around the Chatham Islands.

David · Unread post by **David** » Mon 01/05/2023 07:52

Up to 36mm here in the last 24hrs. Min of 18.4C overnight.

Nev · Unread post by **Nev** » Mon 01/05/2023 09:15

27mm here in the last 24 hrs - the start of what looks like a fairly wet next 2 weeks...

spwill · Unread post by **spwill** » Mon 01/05/2023 12:27

Tomorrow looks brighter here with plenty of sunshine, the frontal activity is back on Wednesday with some
heavy showers, maybe a thunderstorm.
48mm here last 24hrs with some heavy showers yesterday evening and earlier this morning.
Current dew point here is 19.5C.
The current dew point in Darwin is 19.9C, Cairns 21C.

David · Unread post by **David** » Mon 01/05/2023 13:05

Hit 20.0C dewpoint here not long ago, a first for any May in my records.

harleyb · Unread post by **harleyb** » Mon 01/05/2023 19:39

There's an ominous looking convergence zone for the upper to western north and/or upper south in the outlook for Wed night/Thu, I guess its impact will depend on where it lines up and how long it stays in one place. I'm in Taranaki for the week so might get to see some decent heavy rain from it (compared with the usually uninteresting weather of the Manawatu).
Crazy warm temperatures in any case, hard to believe it is May? I think March was cooler.

spwill · Unread post by **spwill** » Mon 01/05/2023 20:58

Wednesday into Thursday does look ominous, a very slow moving active frontal feature.
Feels like the tropics tonight with the dew point near 19C.

NZ Thunderstorm Soc · Mon 01/05/2023 22:55

Foggy start again this morning clearing away this morning to become a fine day with a fine and mild sunny day.
Some high cloud cirrussy stuff with a weak sundog photographed this afternoon.
16.5C for today with light variant winds.

David · Unread post by **David** » Tue 02/05/2023 09:15

18.3C min here overnight. Warm nights here to stay for a while... not the kind of thing you expect to see in May!

spwill · Unread post by **spwill** » Tue 02/05/2023 11:49

Looks like the main dumping ground for rain next 3 or 4 days will be just west of here.

cbm · Unread post by **cbm** » Tue 02/05/2023 12:18

23.9, the May record in my station's short history looks to be 24.3 on May 1st, 2018. EDIT: now 24.6, so broken already.

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darcyplumb · Unread post by **darcyplumb** » Tue 02/05/2023 19:18

Currently 21 degrees C here with a moderate north easterly - ridiculous for this time of the year!

JP. · Unread post by **JP.** » Tue 02/05/2023 21:46

Yes it’s very warm in ChCh city tonight. Crazy for evenings to be so warm.

NZ Thunderstorm Soc · Tue 02/05/2023 22:48

Totally insane

19.6c here at the moment going up from today's maximum of 20C this afternoon.
Light northerly blowing this evening. Lit the fire early this evening but now it's gone out.
Fine day here today with some high cloud. Low cloud hanging around the coast though this morning.
Good to see the revamped Rain radar back on line in Wellington. There was something on the news on TV One this evening about it.

Nev · Unread post by **Nev** » Wed 03/05/2023 12:09

cbm wrote: ↑Tue 02/05/2023 12:18 23.9, the May record in my station's short history looks to be 24.3 on May 1st, 2018. EDIT: now 24.6, so broken already.

Hamilton Aero and Ruakura also smashed their previous warmest May temp records yesterday with 23.5C and 24.3C respectively.

Hamilton Aero's previous record was 22.5C *[Edit] set in 2018, from records since 1971.
And Ruakura's previous record was 23.5C also set in 2018, from records since 1906.

cbm · Unread post by **cbm** » Wed 03/05/2023 12:35

Nev wrote:
cbm wrote: ↑Tue 02/05/2023 12:18 23.9, the May record in my station's short history looks to be 24.3 on May 1st, 2018. EDIT: now 24.6, so broken already.

Hamilton Aero and Ruakura also smashed their previous warmest May temp records yesterday with 23.5C and 24.3C respectively.

Hamilton Aero's previous record was 22.4C set in 2018 and 2004, from records since 1971.
And Ruakura's previous record was 23.5C also set in 2018, from records since 1906.

Decent agreement with my station then, with previous record being on the same day. The old records from Ruakura contain some extremes both hot and cold so wouldn't been surprised if a 24 or 25 in May had been recorded way back, but not then.

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Razor · Unread post by **Razor** » Wed 03/05/2023 14:11

Currently reading 25 degrees here in Lincoln

NZ Thunderstorm Soc · Wed 03/05/2023 23:43

Yes, it has been a fine and warm day here, as in other parts of Canterbury today. 22.5C here for today with northerly winds.
1.3mm from an overthrow rain shower from the west this morning.

Bradley · Unread post by **Bradley** » Thu 04/05/2023 10:07

Both GFS and EC are hinting at a low pressure system/cold air collision over Canterbury next Thursday/Friday with low level snow and 40-60mm over a wide area. We will have to wait until we get closer to the event to lock anything in but at the moment heavy snow to 400m asl and maximum temps of 7-8C for lower areas seems a good possibility...

Nev · Unread post by **Nev** » Thu 04/05/2023 11:45

A few more sites have broken their warmest May temp records:

NIWA's Invercargill Aero site with 23.8C yesterday smashed its previous record of 21.7C set in 1924, from records since 1906.

NIWA's Cromwell site with 24.0C yesterday just tipped its previous record of 23.9C set in 2016, from records since 1950.

NIWA's Queenstown site with 22.4C yesterday beat its previous record of 21.7 set in 2000, from records since 1930.
And MetService's Queenstown Aero site with 23.0C yesterday smashed its previous record of 21.3 set in 1979, from records since 1969.

And on May 1st, NIWA's Whanganui, Spriggens Park site recorded 24.3C, also just tipping its previous record of 24.2C set in 1956, from records since 1937.

NZ Thunderstorm Soc · Thu 04/05/2023 22:53

Some light rain overnight, early this morning but clearing away to a fine blue dome day with a light southerly.
Up to 21.3C for today.

cbm · Unread post by **cbm** » Thu 04/05/2023 23:04

Nev wrote:A few more sites have broken their warmest May temp records:

NIWA's Invercargill Aero site with 23.8C yesterday smashed its previous record of 21.7C set in 1924, from records since 1906.

NIWA's Cromwell site with 24.0C yesterday just tipped its previous record of 23.9C set in 2016, from records since 1950.

NIWA's Queenstown site with 22.4C yesterday beat its previous record of 21.7 set in 2000, from records since 1930.
And MetService's Queenstown Aero site with 23.0C yesterday smashed its previous record of 21.3 set in 1979, from records since 1969.

And on May 1st, NIWA's Whanganui, Spriggens Park site recorded 24.3C, also just tipping its previous record of 24.2C set in 1956, from records since 1937.

2.1C over record for a station with a long history is massive.

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Rangitane · Unread post by **Rangitane** » Fri 05/05/2023 11:57

3 torrential downpours in kerikeri this morning. Trough has moved eastward against the forecasted westward drift. No thunder yet which is surprising given the intensity. Must be a lot of warm air aloft although some lightning showing up further north .

Razor · Unread post by **Razor** » Fri 05/05/2023 16:36

Bradley wrote: ↑Thu 04/05/2023 10:07 Both GFS and EC are hinting at a low pressure system/cold air collision over Canterbury next Thursday/Friday with low level snow and 40-60mm over a wide area. We will have to wait until we get closer to the event to lock anything in but at the moment heavy snow to 400m asl and maximum temps of 7-8C for lower areas seems a good possibility...

I'll take snow on my birthday...May 12. Thanks!

NZ Thunderstorm Soc · Fri 05/05/2023 19:07

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