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Supercell Mushroom Cloud – 4th November 2000

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Supercell Mushroom Cloud - 4th November 2000

On this day in 2000, I was in northern NSW chasing the region with a very favourable setup with surface lifted index values of -10. Of course, it was in the early days and little did I know at the time that winds can carry that very potent region further east! Well it mostly occurred on the Northern Tablelands  beginning with Dorrigo (billiard sized hailstones at 11am!) and then Grafton region later. There were several storms in this region and northern NSW during this event and the day after! This storm was observed on the road east of Inverell and just prior to descending the escarpment. Quite impressive convection. An impressive cumulonimbus cell developed near Grafton and Ballina region with cloud to clear air lightning observed from both storms!

Supercell 3rd November 2012 near Emerald Queensland

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See : 128km Radar Loop for Emerald, 07:00 03/11/2012 to 14:00 03/11/2012 UTC

Looks to have been a supercell this evening just after dark in the region south of Emerald. Deep layer shear and modest flow aloft coupled with moist air and surface heating must have exploded just after sunset. The concerned severe thunderstorm warning from the Bureau of Meteorology was for very large hailstones and destructive winds:

For people in parts of the
Central Highlands and Coalfields and
Maranoa and Warrego Forecast Districts.

Issued at 9:38 pm Saturday, 3 November 2012.

Severe thunderstorms are likely to produce destructive winds and large hailstones in the warning area over the next several hours. Locations which may be affected include Emerald, Blackwater, Taroom, Rolleston, Springsure and Carnarvon National Park.

Particularly dangerous thunderstorms are currently located on radar in the vicinity of the northern Carnarvon National Park and moving northwards towards the Springsure and Rolleston areas during the next hour or two. These dangerous thunderstorms are likely to produce destructive winds and very large hailstones.

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