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Old 06-08-2021, 08:05 AM
 
Location: Sydney, Australia
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Southeast Australia is in the midst of a polar vortex, with snow being overcast as far north as southeast QLD.



Snow possible for southern Queensland as mid-week cold snap looms
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Winter 2021 discussion thread (Southern Hemisphere)-untitled.jpg  
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Old 06-08-2021, 02:34 PM
 
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Snow will reach unusually low levels in eastern Australia on Wednesday as a large pool of polar air moves over the region.

Pic from July 2015 on the QLD/NSW border
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Old 06-08-2021, 02:36 PM
 
Location: Fort Worth, Texas
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Quote:
Originally Posted by greysrigging View Post
Snow will reach unusually low levels in eastern Australia on Wednesday as a large pool of polar air moves over the region.

Pic from July 2015 on the QLD/NSW border
Probably a harbinger for the 2021-2022 winter in the northern hemisphere……….
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Old 06-09-2021, 01:22 AM
 
Location: Sydney, Australia
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Quote:
Originally Posted by greysrigging View Post
Snow will reach unusually low levels in eastern Australia on Wednesday as a large pool of polar air moves over the region.

Pic from July 2015 on the QLD/NSW border
I read that it's a cut-off low.

At 10C, tomorrow will probably have the lowest high in decades in my area!

Quote:
Originally Posted by Isleofpalms85 View Post
Probably a harbinger for the 2021-2022 winter in the northern hemisphere……….
Y'all need to brace yourselves.
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Old 06-09-2021, 07:14 PM
 
Location: Sydney, Australia
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We're in the middle of a freezing cut-off low. It's 11am and temperatures are struggling to reach 8C. I would think that it was under these conditions when "snow" (probably graupel) fell in Sydney CBD in 1836.



And it looks like we will have the coldest day in 25 years, with temperatures only reaching 11C (52F) in the CBD!

https://www.smh.com.au/national/nsw/...d-refresh=true

And Orange NSW is blanketed by snow (source Sydney Morning Herald):



And Blackheath (which is around 50-110km away from Sydney, depending on the suburb):

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Winter 2021 discussion thread (Southern Hemisphere)-untitled.jpg  
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Old 06-10-2021, 08:43 AM
 
Location: Northern Virginia
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That's kinda funny if you consider that a winter high of 11C i.e. 52F would be a common and expected occurrence in the U.S. all the way down into Georgia, Alabama, Mississippi, Central Texas (and of course in many places it would be deemed a pretty mild winter's day).
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Old 06-10-2021, 03:29 PM
 
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Sydney's coldest day in decades
( source: weatherzone )
Sydney just shivered through its coldest day in 37 years as icy winds blew across NSW.

Clouds, rain and a freezing air mass wrapping around a large and slow-moving cut-off low pressure system prevented the temperature from getting any higher than 10.3ºC at Sydney's Observatory Hill weather station on Thursday, as of 5pm AEST.

If this temperature isn't exceeded by 9am on Friday, this will officially be Sydney's coldest day in 37 years.

Based on the running maximum temperatures at 5pm, it was also the coldest day in 37 years at Inverell (6.1ºC), 29 years at Mudgee (5.9ºC) and 25 years at Sydney Airport (11.4ºC).

What makes today's cold weather in Sydney even more remarkable is that it occurred under predominantly northerly winds.

Northerly winds usually drag warm air over Sydney from northern NSW or the Tasman Sea. But today, air wrapping around the large cut-off low meant that the air passing over Sydney from the north actually originated near Antarctica.

This same cut-off low also directed a stream of warmer, moisture-laden air into Victoria on Thursday. So, while Sydney was struggling to reach 10ºC under northerly winds, Melbourne spent much of the day around 14ºC in southerly winds.

The cut-off low has also brought a substantial snow to some parts of NSW during the last couple of days, while rain caused major flooding in Victoria.
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Old 06-10-2021, 06:01 PM
 
Location: Buenos Aires and La Plata, ARG
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Quote:
Originally Posted by Veritas Vincit View Post
That's kinda funny if you consider that a winter high of 11C i.e. 52F would be a common and expected occurrence in the U.S. all the way down into Georgia, Alabama, Mississippi, Central Texas (and of course in many places it would be deemed a pretty mild winter's day).
Even by our standards too. Coldest high of the last 25 years here was around 5ºC, and even discounting that freakish event (wich included snow and all), the next ones sit at around 6-7ºC. A lowest max of 11ºC here is like the minimum benchmark to consider a winter wasn't a complete fiasco in terms of an abscense of any significant cold outbreak.

Quote:
Originally Posted by Ethereal View Post
True. But that's because there's a huge ocean between us and Antarctica, which mildens up temperatures. Whereas North America and Asia is pretty much "connected" to the arctic circle.

In the western suburbs of Sydney, the high was 8C (46F), coldest day since 1984.
But here we're in the same hemisphere, at the same latitude, yet as you can read above, we aren't THAT mild.

Last edited by marlaver; 06-10-2021 at 06:30 PM..
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Old 06-10-2021, 06:23 PM
 
Location: Sydney, Australia
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Quote:
Originally Posted by Veritas Vincit View Post
That's kinda funny if you consider that a winter high of 11C i.e. 52F would be a common and expected occurrence in the U.S. all the way down into Georgia, Alabama, Mississippi, Central Texas (and of course in many places it would be deemed a pretty mild winter's day).
True. But that's because there's a huge ocean between us and Antarctica, which mildens up temperatures. Whereas North America and Asia is pretty much "connected" to the arctic circle.

In the western suburbs of Sydney, the high was 8C (46F), coldest day since 1984.
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Old 06-11-2021, 02:34 AM
 
Location: Sydney, Australia
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Quote:
Originally Posted by marlaver View Post
But here we're in the same hemisphere, at the same latitude, yet as you can read above, we aren't THAT mild.
We're not. But compared to southeast USA and southeast China, eastern Australia is relatively mild in the winter. I can't say much about South America because I'm not very informed about its climate.

One other thing that I forgot to point out to Veritas Vincit is that our coastal cities are very ocean moderated. So it's not fair or right to compare Sydney to inland areas in the US southeast such as Central Texas, Alabama and Mississippi.
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