Category Archives: Effects of Storms

Effects of Storms can be anything from the change in temperature to the damage in some cases extreme destruction

Hailstorm and Flash Flooding near Bathurst 10th January 2019

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Today's chase began a little late. Made to the Mt Victoria and Lithgow area with storms already brewing and a severe thunderstorm warning (advice) in place. After monitoring the region near Port;land, I decided to head west over the range to clearer air. The constant rumbles and distant loud thunder also meant a storm was in the region.

Just east of Bathurst, several cells approached on radar towards Mudgee and Kandos - the southern cell approached my vicinity. Outflow from the storms near Oberon fed a nice updraft base developing ahead of the southeast propagating cell. The base consolidated rapidly and showed inflow characteristics for a short while. A barrage of lightning ripped from this beautiful base with green tinge. The lack of shear though saw a collapse into a high precipitation cell with hailstones to about gold ball size though most 3 to 4cm in diameter. Persistent heavy rainfall including some flooding and streams of water across paddocks was also widespread. Unfortunately, the 20 to 30 minutes deluge melted the hailstones to 1.5 to 2cm in diameter rendering measurement meaningless.

After an attempt to head south ahead of the southern cell, it was clear the storms had already utilised the energy. Lightning and rain followed me back to Sydney.

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Torrential Hailstorm at Tarana 3rd January 2019

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Given adjusted soundings were just as favourable (although slightly narrower in the Central Tablelands, I decided to head west rather than south. I am glad I made this move.

On arrival the first storms were developing in the Wollemi National Park - no roads. However, it seemed the storms were back-building slightly and further development on the southern flank. A storm developed and produced pea -sized hail near Bell - yes two days in a row with hail!

This weakened so another cell was developing west of Katoomba in the valley. Near the Cox River, this cell consolidated and developed a nice anvil and updraft structure. The northern end seemed to split and develop as well almost overhead! This produced hailstones on the core's edge to 1cm.

I exited the valley towards Hampton and this introduced me with a glimpse to the beast near Oberon. Taking the road from Hampton to Rydal, I had to pass through not one but two separate hailstorms to get a good view of this very persistent cell! And what a sight! And massive updraft separated from the precipitation with nice anvil shield! Making a direct course to the updraft took me to Tarana where an impressive base hugged the mountains overlooking the valley!

There was no way I was gong to miss this core and entered it right in Tarana. I noticed a more ideal road heading north and it was here right across the stream, larger hailstones began to thump the vehicle! Soon the whole road was white and hail began to pile in the gutters as well. I attempted to slowly make my way further north, but the torrent of rain and hail was overwhelming making visibility low together with hail fog. Then comes a road subject to flooding sign - oops straight through! Then another straight through that as well. The hail was thundering on my vehicle -it was deafening!

Up the hill I finally rose and that gave me comfort of safety. A vehicle overtook me and then suddenly slows down.Flash flooding crossed the road with torrents of water and debris! It was unbelievable - this core was very insane producing intense and sudden bursts of hailstones. It was difficult to see at times but further northwest, I finally could see a clearing. I was out of the core briefly before heading east along the Great Western Highway towards Mt Lambie entering the remnants of the core which still was intense! After seeing the storm out near Portland, I decided to quickly head back to Tarana to measure the hail. At first it seemed mostly 3 to 3.5cm hail - I could tell from the deafening noise and occasional loud thumps that the hailstones were about golf balls! Further down this was confirmed - hail to 4cm (remembering that I had left the storm 40 minutes earlier and with the rain some melt would have been occurring. Some of the hailstones would be kept cold protected by the hail drifts.

The aftermath was a mess with a torrent of hail piled up up to 20-30cm in depth swept in gutters with mud! And let's not forget boulders yes very large rocks washed onto the road by the flash flood as well as small branches!

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