The last time a storm this big moved through Sydney was back on April 14, 1999. That day a Supercell developed down in the Illawarra and moved North to cause over $1billion damage around the City's East. Today was similar to that day, a Supercell formed south of Penrith and turned left taking the traditional supercell north east track across the western suburbs to the Hills/Upper North Shore. Along the way massive hail up to 8cm in size smashed suburbs in its path with widespread house and car damage reported.Up to 30 people have been reported injured by the storm.

Below is the first video I have got online showing the storm moving towards the Hills region. The footage shows the structure of the rotating updraft at first before I change angles to capture the base and wall cloud rapidly rotating. We are fortunate in Sydney that we don't get the strong low level jets they get in the USA. Had we got one, not only would we have encountered damaging hail, we would have had a good chance of a Tornado. Instead the lack of inflow means the outflow of the storm pushes out killing the wall cloud and causing damaging winds in its path. You can see the Rear Flank Downdraft to the right of the base wrapping around cyclonicaly before a stronger downdraft kicks in pushing the wall cloud into a gust front. An amazing storm. Shortly after this video hail up to 7cm fell. Video of that coming shortly.