Tyson Millar

@WeatherProf This where you conflate climate with weather making it easy for climate change deniers to dispute. It’d be helpful if you could post climatic changes.

The Arctic is en Fuego! (Not really, it’s still cold up there, but parts are almost 40 degrees above normal!) True story: In college (30 years ago) we learned that Global Warming would warm the poles much faster than the rest of the planet. They showed us primitive, yet vivid computer model map projections. I internalized that and thought…. Ok, if climate change is real and models are right, then decades from now we’ll be able to verify this. Sure enough it’s happening (has been for a while) as the Arctic is warming at 3-4X the global average, due partly to feedbacks from disappearing ice. This, in part, has proven to me and solidified my understanding of climate change. Nothing exists in a bubble in Weather. Its all connected. Each action has an opposite reaction. And when the Arctic (and Antarctic) is so off-kilter, extreme weather hi-jinx tend to ensue!

@pinturicchio_60 @ItaliAntartide @ENEAOfficial The by-product of October’s minor stratospheric warming event.

A heat wave hits all of East Antarctica On November 13 the highs reached -27.9 °C at Vostok and -27.3 °C at Concordia Data taken from climantartide.it @ItaliAntartide @ENEAOfficial

‘Final Warming’ of the Southern Stratospheric Polar Vortex is potentially underway with a new stratospheric warming event that is likely to result in the reversal of zonal winds. Could be a long summer with persistent negative SAM signal for midlatitudes. facebook.com/share/p/1BXr4N…

@Met4CastUK 👍🏼👍🏼

There appears to be an uptick in bot farms targeting those talking about climate change. The abuse and misinformation is off the scale. Leave a like 👍🏻 if you’re human and care about science.

@LisaScafPerthLM @GemmaTognini Perth would have to be the biggest waste of bike lane test cases because the urban sprawl forces most to drive or utilise public transport. Median commute distances must be around 10km?!

@GemmaTognini Yep! Remember being told cycle lanes were going to be greatly needed. Was never convinced. Look how they’ve ruined Barrack St and Bulwer St in Perth in particular. And the millions wasted to create them.

Please enjoy this vid i took on Tuesday at 6.15 (peak hour) of the Pitt Street bike lane, demonstrating its utility. Note, this is peak hour 😂👇🏼

@foddiemoitj3 Likely to impact much mid latitude Australia (including SA), possibly into the summer months.

@TysonMillar Will this impact South Australia?

East Coast Australia: Your subscription to a long hot summer and strong westerly winds in the south is currently updating. New ‘Major’ SSW event is in the forecast. Stratospheric Warming study abstract by Bischof et al. (2025)

@HaurakiGulfWx More to come in the forecast.

Lots of folks in NZ & SE Oz are wondering what is generating the extreme winds this Spring. Here is a snippet from September of what was about to occur. Sudden Stratospheric Warming events will trump other climate drivers at this time of year.

@antsharwood Get ‘em Ant!

Developers are about to destroy these lovely mature gums in Sydney and I think I’m going to take a stand… to preserve this stand of trees. I have never done anything like this and will doubtless get savaged by the system, but f it I’m gonna give it a go

@andrewmiskelly And a hairdryer on Wednesday, in October.

Negative SAM. Not your cynical mate's nickname, but the reason there are mountain waves over eastern NSW in late October.

@TomSaundersABC Playing out not dissimilar to the 2019 minor SSW event (albeit with records in December). Looking like another SSW (possibly its 'final warming' phase) at the end of this month.

The strength of the polar vortex at 10mb has been 100km/h below average this spring. The ripple effect now seems to be peaking at the surface with SAM diving this week. The result (without a proper attribution study) = possible hottest October on record for #Sydney and #Brisbane.

@TomSaundersABC Looked similar in June after a claim that BOM was wrong about their positive temp anomaly for winter…

Perhaps surprisingly this NCEP/NCAR re-analysis shows that even compared to the recent warm climate period (1991 - 2020) this winter has still been warmer than average across most of Australia.

@croydoncathy @MikeCarlton01 Scott Morrison was pretty close…

@MikeCarlton01 He really is. Completely bonkers. Can you just imagine any one of Australian Prime Ministers communicating like this? I can’t. The Parliament, political parties and people of Australia would demand their removal

Off his face. Trump is demented.

@andrewmiskelly @OldMateEngineer Zonal wind for the last 6 months for the respective upper strat. @ 10mb demonstrating its easterly phase in Jan-Mar.

@TysonMillar @OldMateEngineer Yes, a wind speed rather than potential vorticity map would highlight that there isn't really a vortex in summer (due to diminished temperature contrast).

The June solstice occurs at 02:42 UTC (12:42 AEST) on Saturday. As polar night falls over Antarctica, stratospheric temperatures there become much colder than over the mid-latitudes, causing the south polar vortex to spin up.

@OldMateEngineer @andrewmiskelly Well, kinda, sorta. In effect the ‘vortex’ becomes dormant in summer months as it exhibits a comparatively mild easterly wind phase.

@andrewmiskelly Woah, the vortex reverses?

@SamKSS @mattjcan You seem the Keeling Curve lately? How much proof do you need?

@mattjcan Net zero will prove to be the biggest misallocation of resources in history. The amount of money, people and property wasted on this futile endeavour is obscene.

This is an environmental catastrophe. Why are we destroying our beautiful Australian bush?

@antsharwood 900m is a real stretch this weekend for the mainland. That’s snow to Cooma elevations. Can’t see that. SE winds at the surface but dew point winds from the south so the Tasman influence would be a stretch too. Need to add Tasmania shadowing in there as a drying component.

Gonna snow this weekend. As my story says, accumulations could even be slightly heavier than predicted due to moisture sucked up from the very warm Tasman Sea Could be an interesting (but obviously super rare) case of global warming enhancing a snow event weatherzone.com.au/news/first-sig…

@andrewmiskelly Great capture of the 'breaking wave' pattern with the cold air wrapping around that embedded low.

Wintry conditions extending across TAS, as the deepest of the incoming cold air arrives.

First Major snowfall of the year for Mount Mawson, #Tasmania (~1200m ASL). 124 km/h wind gusts for Mount Wellington/kunanyi overnight.

Finally got a clear pass via Sentinel Satellite of New Zealand's impressive May snow dump. Here's the lower Canterbury, Upper Otago region. Second frame is Mount Hutt (centre frame). #NewZealand