5-7th june heavy rain/snow event

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talbotmj15
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Re: 5-7th june heavy rain/snow event

Unread post by talbotmj15 »

Latest from M/S. Heavy snow to West of Chch.
Heavy Snow Watch
Area: Canterbury, including Banks Peninsula
Valid: 13 hours from 12:00am to 1:00pm Wednesday
Forecast: Snow is expected to fall to low levels overnight tonight (Tuesday) until early Wednesday afternoon. During this period expect significant accumulations in some areas above 400 metres, including Banks Peninsula, and also possibly above 200 metres on the Plains west of Christchurch, where amounts may approach warning criteria.
Ice Maiden
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Re: 5-7th june heavy rain/snow event

Unread post by Ice Maiden »

After persistent rain for over an hour the temperature has risen back over 3C but now we have heavy hail. We are at 60m asl roughly .
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NZstorm
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Re: 5-7th june heavy rain/snow event

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Gore is 70m above sea level. (in reference to photo)
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TonyT
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Re: 5-7th june heavy rain/snow event

Unread post by TonyT »

Bradley wrote: Tue 05/06/2018 20:28
Yes Springfield certainly sits in an area on that map where there will be some decent snow falling yet the latest run of EC for Springfield on the Yr website it shows no snow at all for Springfield?

https://www.yr.no/en/overview/daily/2-2 ... pringfield
The yr model is a mesoscale model which runs on top of ECMWF output. Its not ECMWF. The two are different, but one underpins the other.
Flutterbye
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Re: 5-7th june heavy rain/snow event

Unread post by Flutterbye »

Richard wrote: Tue 05/06/2018 19:27 Interesting the temp difference between Gore -0deg and Invercargill and 6deg
Stewart Is does a good job at flicking a lot of the showers either side of Invercargill in a SW flow.
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TonyT
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Re: 5-7th june heavy rain/snow event

Unread post by TonyT »

talbotmj15 wrote: Tue 05/06/2018 21:06 Latest from M/S. Heavy snow to West of Chch.
Heavy Snow Watch
Area: Canterbury, including Banks Peninsula
Valid: 13 hours from 12:00am to 1:00pm Wednesday
Forecast: Snow is expected to fall to low levels overnight tonight (Tuesday) until early Wednesday afternoon. During this period expect significant accumulations in some areas above 400 metres, including Banks Peninsula, and also possibly above 200 metres on the Plains west of Christchurch, where amounts may approach warning criteria.
Good to see them catching up with the local forecasters! 8)
AKLsurfer
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Re: 5-7th june heavy rain/snow event

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Queenstown airport webcam right now ImageImage


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talbotmj15
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Re: 5-7th june heavy rain/snow event

Unread post by talbotmj15 »

Yes agree very much Tony. M/S have really been struggling the last week. Missed the North Auckland downpours and flooding, Missed again with the Tologa bay deluge yesterday and missing with the snow today till the last minute. We can all see the models and what they are telling us yet they just stubbornly dont warn people until its too late. For the National broadcaster to be struggling to keep up is a bit of a worry.
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NZstorm
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Re: 5-7th june heavy rain/snow event

Unread post by NZstorm »

Duednin Airport ob has temp 1C and snowing. The airport is 1m above sea level.
talbotmj15
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Re: 5-7th june heavy rain/snow event

Unread post by talbotmj15 »

Snow has been reported. in Methven, Mt Somers, Castlehill, Queenstown, Dunedin, Gore, Te Anau so far from what ive heard
spwill
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Re: 5-7th june heavy rain/snow event

Unread post by spwill »

talbotmj15 wrote: Tue 05/06/2018 21:23 Yes agree very much Tony. M/S have really been struggling the last week. Missed the North Auckland downpours and flooding, Missed again with the Tologa bay deluge yesterday and missing with the snow today till the last minute. We can all see the models and what they are telling us yet they just stubbornly dont warn people until its too late. For the National broadcaster to be struggling to keep up is a bit of a worry.
I seem to recall Metservice did have watches and warnings for the heavy rain over the upper NI at the weekend. Certainly their Thunderstorm outlook mentioned the risk of severe thunderstorms and their severe weather outlooks on the days before mentioned the risk of heavy rain. .
RWood
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Re: 5-7th june heavy rain/snow event

Unread post by RWood »

Flutterbye wrote: Tue 05/06/2018 21:18
Richard wrote: Tue 05/06/2018 19:27 Interesting the temp difference between Gore -0deg and Invercargill and 6deg
Stewart Is does a good job at flicking a lot of the showers either side of Invercargill in a SW flow.
Nevertheless In'gill gets a lot of showers in flows not far from that - certainly did in my day. The actual directions were probably more WSW or even W by S.

Edit: checking with a windrose diagram based on 50 years of data, the strongest winds - and probably a lot of the showers - were in the range I suggested. We just called them "south-westerlies" as it takes less time to say it.
katipo
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Re: 5-7th june heavy rain/snow event

Unread post by katipo »

Quite heavy shower bands been passing through in the past hour or so with temperature hovering around 3.5degC but has dropped down to 2.8 in the past 30minutes.
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melja
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Re: 5-7th june heavy rain/snow event

Unread post by melja »

Snowing in Rangiora since 4.15am, was heavy now mixed with rain.
Edit. Just rain now and temp up a degree to 1.6C and a strong westerly for some reason.

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Dean.
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Re: 5-7th june heavy rain/snow event

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Standard southwest front here overnight,cleared now fine and frosty.
Richard
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Re: 5-7th june heavy rain/snow event

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Had 9.8mm of rain overnight, currently the temperature is on 3.6deg, no snow at 242m asl
Razor
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Re: 5-7th june heavy rain/snow event

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Nothing of note to report in Chch either. Normal early winter minor SW flick
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Cyclone Tracy
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Re: 5-7th june heavy rain/snow event

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I see the coldest and driest air is just reaching Canterbury now, will be interesting to see the how strong the cold convection off the sea is during the morning.
melja
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Re: 5-7th june heavy rain/snow event

Unread post by melja »

Coldest air went through at around 4am when it reached 0.6C with snow falling then a gradual warming to 5C now in Rangiora.

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Cyclone Tracy
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Re: 5-7th june heavy rain/snow event

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melja wrote: Wed 06/06/2018 08:13 Coldest air went through at around 4am when it reached 0.6C with snow falling then a gradual warming to 5C now in Rangiora.

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Sorry I was meaning aloft (850 to 500 hPa). Surface temps will fluctuate with the showers. An ob at Prices Valley just dropped from 1c to -1c in the last 15 min, it's coldest so far today.
Razor
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Re: 5-7th june heavy rain/snow event

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melja wrote: Wed 06/06/2018 08:13 Coldest air went through at around 4am when it reached 0.6C with snow falling then a gradual warming to 5C now in Rangiora.

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It was brief and weak as it came through Chch just now. Only low topped clouds all the convection out back of Peninsula to sea. Looks like decent snowfalls in the Lyford area
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Bradley
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Re: 5-7th june heavy rain/snow event

Unread post by Bradley »

Driving in to Christchurch this morning there was no snow even at the top of Sugarloaf (500m asl), looks like just a standard cold front in winter we get a few times a year though the south looks to be a little more full on...
melja
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Re: 5-7th june heavy rain/snow event

Unread post by melja »

Get away from the ocean and it's much colder, Chch 4C vs Rangiora 0.6C and shows down south with the difference between coastal towns vs inland even with low altitude.

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Richard
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Re: 5-7th june heavy rain/snow event

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Amazed to hear from a friend in Scargill Valley they they have 2cm on the ground and his place is about 50m asl yet the snow line around here is about 300-350mm, only talking 30kms to the east. Any ideas why its so much higher inland?. Take Methven 330m asl,its the same temp as Woodend on the coast.
Last edited by Richard on Wed 06/06/2018 12:08, edited 1 time in total.
Cyclone Tracy
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Re: 5-7th june heavy rain/snow event

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Richard wrote: Wed 06/06/2018 10:16 Amazed to hear from a friend in Greta Valley they they have 2cm on the ground and his place is about 50m asl yet the snow line around here is about 300-350mm, only talking 30kms to the east. Any ideas why its so much higher inland?. Take Methven 330m asl,its the same temp as Woodend on the coast.
Just my opinion - At higher altitudes atm (above 1500m), the temperatures are fairly stable, it's drier and very cold. If a strong cold convective shower comes off the sea, the better evaporation and melting process conditions nearer the coast will strengthen energy, super cooling the air temps near the surface and allow snow levels to drop. Your friend in Greta Valley at 50 asl would have been in one of those sweet spots earlier.
Last edited by Cyclone Tracy on Wed 06/06/2018 10:39, edited 2 times in total.