Rapidly Deepening Low and Possible Snow Event July 20-22nd

NZ Thunderstorm Soc · Fri 21/07/2017 19:24

What did the depression drop down to ?
979 hPa it got down to here.

snowchaser01 · Unread post by **snowchaser01** » Fri 21/07/2017 19:35

NZ Thunderstorm Soc wrote:What did the depression drop down to ?
979 hPa it got down to here.

964 I believe. Eastern BP was at 964hpa for most of the day. And that was the closest land to the center. Could have been 963hpa at very center.

Razor · Unread post by **Razor** » Fri 21/07/2017 19:44

Record high tide for all recordings in Christchurch today. Combo of the low pressure, a king tide and the rain. The extreme low pressure accounted for 0.4m of the water levels at Bridge Street by itself

David · Unread post by **David** » Fri 21/07/2017 20:04

snowchaser01 wrote:
NZ Thunderstorm Soc wrote:What did the depression drop down to ?
979 hPa it got down to here.
964 I believe. Eastern BP was at 964hpa for most of the day. And that was the closest land to the center. Could have been 963hpa at very center.

I don't think it dropped below 970 hPa. But still a very deep low.

NZ Thunderstorm Soc · Fri 21/07/2017 20:28

Rain seemed to of eased, apart from the odd drizzly shower, this evening but still rather windy.
All floodwaters have drained away off the street and our property.

Bradley · Unread post by **Bradley** » Fri 21/07/2017 20:31

State of emergency in Dunedin now, more to come before the morning..

TonyT · Unread post by **TonyT** » Fri 21/07/2017 20:35

Looking at the latest satellite imagery, it appears the depression centre has swung west from near Banks Peninsula and crossed the Southern Alps and is now a little south of Westport. If this is correct (and satellite interpretation is not a great skill of mine) then it would be quite rare for a low pressure system to cross the Alps from east to west.

Bradley · Unread post by **Bradley** » Fri 21/07/2017 20:42

Would this mean more or less rain for Canterbury Tony?

NZstorm · Unread post by **NZstorm** » Fri 21/07/2017 20:48

NZ Thunderstorm Soc wrote:, but there's no state of emergency declared here yet,

Timaru district includes Geraldine.

TonyT · Unread post by **TonyT** » Fri 21/07/2017 20:48

Bradley wrote:Would this mean more or less rain for Canterbury Tony?

I don't know! Depends on too many other factors. And also depends on where it goes next.

Orion · Unread post by **Orion** » Fri 21/07/2017 20:51

Wind has risen again, some noisy gusts whizzing through here just now

Talbotm · Unread post by **Talbotm** » Fri 21/07/2017 20:53

Heres a wild thought. Given the winds constant gusting over 80kph. Huge rainfall and a Barometric pressure dropping into the 960hpa range and a low moving around like a yo yo. This thing looks more like a Cyclone with an eye in the middle. Lets see who has the best name for this Cyclone like storm?? Cyclone Miserable? maybe?

Richard · Unread post by **Richard** » Fri 21/07/2017 20:57

Still very wind here, only at 0.6m/s average WNW.

Dean. · Unread post by **Dean.** » Fri 21/07/2017 21:01

TonyT wrote:
Bradley wrote:Would this mean more or less rain for Canterbury Tony?
I don't know! Depends on too many other factors. And also depends on where it goes next.

Opens up the East coast to cold air...bring on the low level snow

NZstorm · Unread post by **NZstorm** » Fri 21/07/2017 21:18

Naseby PWS has a temp of 0.6C and has stopped registering rainfall so it will be snowing there. Its elevation is 580m.

mikestormchaser · Unread post by **mikestormchaser** » Fri 21/07/2017 21:24

Orion wrote:Wind has risen again, some noisy gusts whizzing through here just now

Some big gusts in rolleston to!

Dean. · Unread post by **Dean.** » Fri 21/07/2017 21:42

NZstorm wrote:Naseby PWS has a temp of 0.6C and has stopped registering rainfall so it will be snowing there. Its elevation is 580m.

Camped at Naseby January 4 2013 and woke up to 5cm of snow on the tent

Tornado Tim · Unread post by **Tornado Tim** » Fri 21/07/2017 22:03

Fairly vigorous storm in NW North Waikato atm, heading SE toward Hamilton.....

einzack · Unread post by **einzack** » Fri 21/07/2017 22:49

Some rather high river flow readings round North Otago at the moment, which look like they may break records...
I've only looked at those closest to me, but Waikouaiti River flowing at 361cumecs an hour ago which breaks the record from August 2012 of when monitoring was started at that particular location. Historically, it's been higher at ~636cumecs (maybe in 1980) so got a wee way to go.
The Shag River, north of Palmerston is recording 358 cumecs which is the 2nd highest at that site, with 1993 higher at 427cumecs.
The fact that it's still raining heavily means these numbers are likely to only increase further.

snowchaser01 · Unread post by **snowchaser01** » Sat 22/07/2017 02:13

Whoever wrote the Road Snow Warnings on Metservice last night needs to learn how to spell! LOL

"Rain may turn to snow or sleat near the summit for a time Saturday morning but little if any is expected to settle on the road."

joecam · Unread post by **joecam** » Sat 22/07/2017 03:12

Tonight (Friday night) I travelled from ChCh to Hororata-Geraldine-Timaru-Glenavy and back to ChCh via SH1 (Yes I get to travel on closed roads) The deepest water on the road was actually at Bankside it was about 50cm. I have a large 4wd so it was ok. The wind & rain was extremely intense most of the trip except Geraldine where at about 22:00 it was very light drizzle. Very strong winds, (enough to blow a 2.5 tonne 4wd around), at Mayfield and along the route. Multiple water across roads and many places where cars should not have travelled and mostly didn't. It was a good trip. I will have some pix tomorrow. I'm hitting the hay.

Razor · Unread post by **Razor** » Sat 22/07/2017 05:53

That second wave is well and truly here, wild old morning out there

Richard · Unread post by **Richard** » Sat 22/07/2017 07:50

yes a wild morning alright, strong SW here, no rain since 11.30pm though but 50.0mm up till then, not sure there will be any more

moylanr · Unread post by **moylanr** » Sat 22/07/2017 08:14

9 mm/h

Razor · Unread post by **Razor** » Sat 22/07/2017 08:26

Raining at a higher rate here this morning than yesterday. 28mm yesterday, 20mm already today, largely in in past 3 hours

Mother Nature taking the piss a bit, nice blue arrow pointed straight at us

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Rapidly Deepening Low and Possible Snow Event July 20-22nd

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Re: Rapidly Deepening Low and Possible Snow Event July 20-22nd