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Giant Hailstones hit Sydney 18th February 2017

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Giant Hailstones hit Sydney 18th December 2017

Giant Hailstones hit Sydney 18th February 2017

Giant Hailstones hit Sydney 18th December 2017

Giant Hailstones hit Sydney 18th December 2017

A ferocious storm known as a supercell hit northwest and northern Sydney with hailstones up to 8cm smashed vehicles and skylights. The storm developed explosively near Bilpin and split with the eastern storm rapidly intensifying and moving east across the northern part of the city.




Large hailstones 4cm in diameter were first report from Londonderry and also Penrith and Richmond reported larger hailstones. The storm intensified and reports came in from Rouse Hill and Box Hill of significant hailstones to the size of 5cm in diameter as the storm rapidly moved east. Hailstones of 7cm was also reported at Glenhaven. the storm persisted and moved towards the Northern suburbs smashing homes and vehicles with more giant hailstones being reported. Serious lightning strikes also disrupted power across the region. This was the most violent hailstorm to hit the Sydney region since December 2007 when part of the region were hit by similar sized hailstones in Blacktown.

A change had entered the region which normally can deter storms from forming due to the cooler air at the surface. But temperatures across western Sydney and ample moisture persisted throughout the afternoon as the sun was allowed to continue baking the region. As the change moved inland, surface convergence along the change near Bilpin was able to break the solid lid on convection and an isolated storm developed. To rapidly exploded as it tapped the energy from warm moist air across the Sydney basin. Being relatively isolated allowed it to intensify to produce giant hailstones supported of course by upper cooling. 

More storms developed across the Illawarra and also the Central Coast with destructive warnings persisting until most of the storms exited the region.
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See : 128km Radar Loop for Sydney (Terrey Hills), 22:00 17/02/2017 to 22:00 18/02/2017 UTC


http://www.theweatherchaser.com/radar-loop/IDR714-sydney-terrey-hills/2017-02-17-22/2017-02-18-22

See : 64km Radar Loop for Sydney (Terrey Hills), 03:00 18/02/2017 to 22:00 18/02/2017 UTC

See : 128km Radar Loop for Wollongong, 22:00 17/02/2017 to 22:00 18/02/2017 UTC

Insane Supercell Structure Dumas, Texas May 18 2010

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Insane Supercell Structure Dumas, Texas May 18 2010

Impressive Supercell in the Texas Panhandle near Dumas 18th may 2010. I am pretty sure that I passed near brief spin-ups in the hook on this event! But this structure did it for me! I was out of position earlier as I had a 6 hour old model data and had to race northwards when I knew that something was wrong visually as soon as I got to my target. I was inside the dryline bulge! Rather than play around with models at this point, I contacted Tim Marshall and he suggested head north which I did. I raced north and watched the supercell exploding over the region near Dumas. I met Daniel Shaw along the road and chased with him for a short while before we stopped at different locations. I had to get these high contrasted shots of structure! #storm #supercell #tornado #structure #Dumas

Bilpin Storm and Lightning 24th December 2016

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Bilpin Storm and Lightning 24th December 2016

More of the pictures from Bilpin of the Bilpin storm mid-afternoon! Time-lapse later. Targetting was difficult today as it depended on interaction by many cells both north and south of Sydney and in the Putty. I went to my local haunt at Windsor and saw this as a cumulus tapping the boundary layer. It was meant to be a repositioning to near Richmond but I ended going up to Bilpin.




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