Very cold polar outbreak August 3rd-5th

Ice Maiden · Unread post by **Ice Maiden** » Sun 04/08/2019 16:54

Snowing in Dunedin I’m at approx 60m asl small flakes but definitely flakes

snowchaser01 · Unread post by **snowchaser01** » Sun 04/08/2019 17:13

Coldest air now moving up the east coast i believe

Razor · Unread post by **Razor** » Sun 04/08/2019 18:07

Sorry Canterbury folk just back from a fantastic afternoon on Mt Sinclair on Banks Peninsula. plain as the nose on my face that everything is going out to sea. It was only ever a chance. On to the next system, whenever that is

shovelopikis · Unread post by **shovelopikis** » Sun 04/08/2019 18:07

Heavy snow shower in eltham, nothing settling.
In hawera tonight; very cold but doubt we will get anything unless it comes with a heavy burst.

Sleet shower in Hawera

NZ Thunderstorm Soc · Sun 04/08/2019 18:22

Nice day here in Geraldine, but cold.
Nice and warm with the sun shining into our conservatory.

Chris Raine · Unread post by **Chris Raine** » Sun 04/08/2019 18:43

Still 1.0C here .The odd light shower of soft hail

Storm Struck · Unread post by **Storm Struck** » Sun 04/08/2019 18:44

Walked up Mt Arthur today, edge of Kahurangi national park.
Snow from about 500m upwards, the summit is 1,750m there was about 10cm at the hut from previous falls.
Mainly snow showers this afternoon, i was expecting it to fully close in going by the forecast maps.
Dr zuess tree in the first photo

, Dracophyllum.

20190804_130435.jpg

20190804_132932.jpg

Razor · Unread post by **Razor** » Sun 04/08/2019 18:45

On the roof of Banks Peninsula this arvo. Snow line about 600-700m from last couple of nights. Calm conditions all afternoon, full clearance in the evening

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Dean. · Unread post by **Dean.** » Sun 04/08/2019 19:03

Just had a brief shower of ice/hail

spwill · Unread post by **spwill** » Sun 04/08/2019 19:24

Hail here just now as the air turns colder here now.

tornado · Unread post by **tornado** » Sun 04/08/2019 19:35

for us Auckland tonight through till morning we may get some hail/thunder as the cold air arrives. lets just wait and see what happens

hozza95 · Unread post by **hozza95** » Sun 04/08/2019 20:21

Been snowing without much let up since around 2:30 now. 10cm's have settled in that time, after all last night's snow melted. Could be a pretty significant snowfall down in gore too at this rate. I'd be surprised if the local state highways aren't closed at some point.

Captain Salty · Unread post by **Captain Salty** » Sun 04/08/2019 21:32

Canty rain radar's been down for an hour :/

NZ Thunderstorm Soc · Sun 04/08/2019 22:45

Captain Salty wrote: ↑Sun 04/08/2019 21:32 Canty rain radar's been down for an hour :/

I see that. Thank goodness the event has been mainly down south and over on the West coast.
I hope it is repaired in time for the inauguration of the new Hindon radar in Otago.

melja · Unread post by **melja** » Mon 05/08/2019 04:59

Embarrassing heavy snow Warning that one for Rangiora north from MS.
Wrong side of the Island.

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tornado · Unread post by **tornado** » Mon 05/08/2019 05:05

in auckland lightning and thunder just now..

NZstorm · Unread post by **NZstorm** » Mon 05/08/2019 06:31

That 5.05am CG strike was on Mangere Bridge.

There was quite an active storm over north Waikato 1.30am.

tornado · Unread post by **tornado** » Mon 05/08/2019 06:36

NZstorm wrote: ↑Mon 05/08/2019 06:31 That 5.05am CG strike was on Mangere Bridge.

There was quite an active storm over north Waikato 1.30am.

I heard like 2 rumbles and saw 1 flash . its odd cause metservice only had low risk and usually theres no thunder during low risk. anyway. didnt get good sleep woke up 1:30 am due to high winds and then at 5am due to thunder and lightning

NZstorm · Unread post by **NZstorm** » Mon 05/08/2019 07:05

tornado wrote: ↑Mon 05/08/2019 06:36 its odd cause metservice only had low risk and usually theres no thunder during low risk.

There was particularly cold air in the lower atmosphere with high instability. The low topped cb's in very cold air can produce surprise storms.

For thunderstorm forecasting I use -30C cb tops as a lightning signal because that is a sure indicator.
But science says lightning becomes possible with cb tops at -20C.

Nev · Unread post by **Nev** » Mon 05/08/2019 07:10

NZstorm wrote: ↑Mon 05/08/2019 06:31 That 5.05am CG strike was on Mangere Bridge.

There was quite an active storm over north Waikato 1.30am.

Hmm… Blitzortung only has a CG just north of Miranda in the Firth of Thames around 5am. Also heard a low rumble just after 6pm last night, which I assumed was from a CG Blitz had around the Rangitoto Channel.

Blitzortung NZ - 12 hrs to 5am, Aug 05.png

Chris Raine · Unread post by **Chris Raine** » Mon 05/08/2019 07:11

Thunderstorm at Thornbury now with hail.Temp 3.2 C

hozza95 · Unread post by **hozza95** » Mon 05/08/2019 07:26

Up to 18cm's here now. Powers out and still snowing

David · Unread post by **David** » Mon 05/08/2019 08:05

tornado wrote: ↑Mon 05/08/2019 06:36 I heard like 2 rumbles and saw 1 flash . its odd cause metservice only had low risk and usually theres no thunder during low risk. anyway. didnt get good sleep woke up 1:30 am due to high winds and then at 5am due to thunder and lightning

Also heard the 2 rumbles and saw the second flash. Just loud enough to stir me awake.

tornado · Unread post by **tornado** » Mon 05/08/2019 08:07

David wrote: ↑Mon 05/08/2019 08:05
tornado wrote: ↑Mon 05/08/2019 06:36 I heard like 2 rumbles and saw 1 flash . its odd cause metservice only had low risk and usually theres no thunder during low risk. anyway. didnt get good sleep woke up 1:30 am due to high winds and then at 5am due to thunder and lightning
Also heard the 2 rumbles and saw the second flash. Just loud enough to stir me awake.

yeah its great to see lightning again.

Razor · Unread post by **Razor** » Mon 05/08/2019 08:42

A good frost here this morning, -4

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Very cold polar outbreak August 3rd-5th

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