According to the Canberra 256km Radar this afternoon, a massive thunderstorm roared through the section of the Snowy Mountains region within the NSW border between Bombala, Dalgety, Jindabyne and Thredbo. Going by only amateur readings of the radar image at the time, it seems the storm would've been intense enough to produce supercellular features, perhaps the likes of large hailstones and very heavy rainfall. However, because it occurred over a very isolated & remote area, rainfall observations or storm reports will be extremely difficult to come by. According to the 24 hour Flood Warning Service rainfall map, there are no stations that report through their rainfall readings on a day to day basis in the vicinity of the thunderstorm. The since 9am readings that are available show that 13mm fell at Myalla Lake, just south of Cooma, that fall coming from that other less significant cell further north. Looking at more detailed maps of this particular area of south-eastern NSW, I've plotted the storm to have passed right over Mount Alexander, 1075m above sea level & adjacent to the Little River, before continuing its path over the eastern Snowy River and weakening over the homestead of Jimenbuen, followed by the homestead of Bungarby (next to Beards Lake), Mount Rix (988m above sea level) and the homesteads of Rodney & Tombong.
If there are communities located in the approximate area in the vicinity of Mount Alexander, it would be very interesting to see the reports of what happened. It is perhaps the most isolated area in south-eastern NSW, so unfortunately we'll never know what features were apparent from the full force of the thunderstorm, unless people report through. On a different note though, was the storm supercellular? Certainly seems as though it was, as the 256km loop tends to substantially under-exaggerate intensity. On the 256km loop, the storm did indeed reach black intensity, developing in the shape of a hook as it did. Just interested me this afternoon, I'm open to any points.
Here is the Canberra 256km Radar loop:
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Canberra 256km radar
