A major storm cleared through Adelaide, and a giant inflatable waterslide turned into a casualty of the demolition. What claims to be the biggest inflatable waterslide on the planet, The Big Wedgie at Glenelg split its moorings and took off in the high winds.

Slide staff had to be evacuated minutes before it cleared out; luckily, nobody was harmed. Parts of the slide that collapsed became snagged on a pine tree. Debris was tossed around the area, and fences had likewise collapsed because of the harsh climate.

South Australia has copped a percentage of the heaviest rain in the last 24 hours since September 2015. Heavy rain, lightning and thunder have swept across Adelaide with southern rural areas generally affected. Adelaide Airport noted wind gusts of up to 89 kph and hail was reported at Hallet Cove.

The Bureau of Meteorology affirmed Adelaide had seen 35 mm of rain in less than 30 minutes on Friday evening. Mitcham and Torrens Park have been some of the worst hit suburbs, with 20 mm of downpour recorded in less than 10 minutes. Localised flooding has been reported on Belair Road, Glen Osmond Road, Goodwood Road and Brighton Road.

The Bureau of Meteorology issued a notice for heavy rainfall and thunderstorms for Adelaide, Mount Lofty Ranges, Yorke Peninsula, Kangaroo Island, Mid North, Murraylands, Upper South East and parts of the Lower Eyre Peninsula, Eastern Eyre Peninsula, Flinders, Riverland, Lower South East and North East Pastoral districts.

In NSW, parts of Sydney copped a huge soaking over the western rural areas, central business district and internal west. The Bureau of Meteorology warned severe storms were likely to hit Sydney, Gosford, Newcastle and Wollongong and also Nowra, Orange, Goulburn, Dubbo, Tibooburra, Cobar and Bourke.

Heavy rain, thunder and wild winds were expected in the region. BoM predicts between 30 mm and 40 mm of rain across Sydney, and the SES has been urged to prepare for the aftermath.