Liam D

Severe weather enthusiast from South-East Australia. I particularly enjoy studying the fluid dynamics of tornadoes with the use of physical tornado simulators.

[Liam D @Tempest08246085]

My ward-type tornado simulator - vortex breakdown transition (single celled to multiple vortex tornado)

https://t.co/awucqpraSS

@ReedTimmerAccu @sigtor2019 @AnthonyC_H @JTMedia2

[Liam D @Tempest08246085]

Approximate location (white star) with radar

[Liam D @Tempest08246085]

Looking west into a potentially #tornadic #supercell at ~5:45pm on Sunday 25/08/24 shortly after impacting Dookie, VIC and surrounding areas. The northerly inflow was incredible as it rushed into the storm at 40-50kmh with decent low level rotation evident in the cloud field.

[Liam D @Tempest08246085]

@NoonanJustin Not much morning cloud coverage to complicate surface heating either as it stands.

[Liam D @Tempest08246085]

My incredible view of the Aurora Australis from #Albury & #Wodonga tonight at around 10:30pm AEST @BOM_Vic @VicStormChasers @AUSSKY @weatherzone

[Liam D @Tempest08246085]

@misocyclonic @AnthonyC_H Hello! Can happily send the CAD model if needed. Any preferred format?

[Liam D @Tempest08246085]

@VORTEXJeff @brandonwxil Another very possible factor contributing to this flow structure is highly convergent radial inflow caused by cyclostrophic disruption via surface drag. Especially considering this tornado appears to be over a forested area where the effect is likely being amplified.

[Liam D @Tempest08246085]

Something really special in the works here:

[Victor Alejandro Alvarez Vega @_victoraalvarez]

After nearly a year's worth of work, @MikeBWeather and I are excited to announce @aguacerowx. We believe this platform will usher in a new wave of what is possible in data visualization. Sign up for the early beta for free here! https://t.co/CW5nvLSPK6

[Liam D @Tempest08246085]

Went #dustdevil spotting near Howlong, NSW today. Most of them were small, lasting less than a minute or so. There were a few larger ones but sadly they remained out in the fields away from the road I was viewing from. A fun afternoon nonetheless!

[Liam D @Tempest08246085]

@tornatrix Awesome! Hope it goes well. The work done with that simulator was so important to our understanding of tornado vortex dynamics (and sparked a likely life long fascination of tornado vortex dynamics and simulators for me).

[Liam D @Tempest08246085]

@tornatrix Love finally being able to see the full footage of this. Do you happen to have any restored (or plan to restore) footage of the Purdue Tornado Vortex Chambers from Church & Snow et al?

[Liam D @Tempest08246085]

@DeanSgarbossa Its possible that this is the first time in Aus wx history (That i'm aware of) for a tornado to be detected with dual-pol products!

[Liam D @Tempest08246085]

@TomSaundersABC @romysteph @abcnews Looks like the cell developed directly over the southerly change which would have provided ample surface vorticity to get the job done. There were a few other cells about that displayed some rotation as well. Gotta love cool season surprises!

[Liam D @Tempest08246085]

@pgroenemeijer Is there somewhere we can read more about this?

[Liam D @Tempest08246085]

This could get interesting... Approaching cool change from the west is on a head-on collision with an outflow boundary coming from the east.

[Liam D @Tempest08246085]

Conditions were ripe for dust devils along the NSW/VIC border today. I positioned myself next to a freshly plowed field between Howlong and Corowa and saw numerous smaller dust devils. This one was the best of the chase. So much fun! https://t.co/IejGMgQkCU

[Liam D @Tempest08246085]

@jeremy_gibbs I see evidence of a dust-devil-like vortex that extends about half way up near the center bottom left. Unsurprisingly, its right where convective cell branches are intersecting.

[Liam D @Tempest08246085]

@jeremy_gibbs Wow this is amazing! How does it work?

[Liam D @Tempest08246085]

@TysonMillar @Ben_Domensino @jtmiske Yes! All these features (especially the NWP & OBS soundings/skew-ts) would make Layers the ultimate one-stop forecasting & nowcasting tool publicly available for Australia.

[Liam D @Tempest08246085]

@TomSaundersABC That profile is as textbook as it gets for post-frontal cool-season hailers.