A strong cold front has passed through Adelaide on Wednesday morning and is now tracking eastwards, dropping temperatures significantly and ushering in a period of cool, unstable, showery weather for the city and southeastern parts of SA that should last until at least Saturday.

• The South Australian capital reached almost 24°C on Tuesday afternoon, and things stayed relatively warm until midnight, when it was still 18.4°C.
• The overnight low was 10.9°C at 8:48 am on Wednesday morning, by which time the cool air behind the front had begun to take effect.
• The passage of the front means that the mercury will be slow to rebound this morning in Adelaide, and the city will struggle its way to a max of 17°C today (the October average is 21.4°C).
• So in other words, it'll be colder all day in Adelaide than it was at midnight.
• The main rainband associated with the front left 2.6 mm of rain in the gauge by 9 am, and intermittent showers can be expected today, albeit nothing that will amount to more than a few millimetres.

Adelaide likely won't see another 20-degree day until Sunday. It'll be even cooler in the far SE of the state, with Mt Gambier looking at maximums of 15°C or 16°C for the next five days.

A significantly warming trend looks like it will kick in with temps rising into the mid twenties early in the new week in Adelaide. But that's a fair way off. For now, it's all about the cool, showery weather in the wake of this morning's front.

And this front is just the tip of a significant spring weather system which will likely see a dynamic cut-off low form over SE Australia, delivering rain, hail, severe storms and supercells in several states, and even spring snow in the mountains.