Adelaide is being urged to prepare for a wet and stormy last weekend of summer, with rain and possible thunderstorms forecast to intensify from Saturday as a tropical low shifts south towards South Australia.
According to the Bureau of Meteorology, a high-pressure system south of the state is moving into the Tasman Sea while a tropical low over the southeastern Northern Territory extends a trough into the northeast of South Australia. The low is expected to move south on Saturday, drawing widespread rain and thunderstorms across much of the state through the weekend.
On Saturday, there is a 75 per cent chance of at least 4mm of rain, a 50 per cent chance of at least 15mm and a 25 per cent chance of at least 35mm. A thunderstorm is possible in the early morning, with rain becoming more widespread during the day.
Conditions are forecast to worsen on Sunday, with heavy falls possible and a 75 per cent chance of at least 10mm. There is a 50 per cent chance of at least 70mm and a 25 per cent chance of at least 80mm, indicating the potential for significant rainfall totals. Thunderstorms may develop during the afternoon and evening.
Statewide, showers and thunderstorms are forecast to extend across most districts on Saturday and Sunday, with some storms potentially severe and capable of producing heavy rainfall and flash flooding.
A Flood Watch remains current for parts of northeastern and central South Australia, with further flooding expected over the coming days across the Mid North, North West Pastoral, South East districts and the Mount Lofty Ranges. Authorities warn that river and creek rises, localised flooding and overland inundation are already occurring in some catchments and may become more extensive as rainfall accumulates.
Emergency authorities are urging residents and travellers not to drive, ride or walk through floodwaters, to stay clear of creeks and storm drains, and to remain indoors away from windows during severe conditions. People are advised to check the latest warnings regularly, monitor local media broadcasts and review road conditions before travelling.
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