Hail has hit Adelaide's CBD and inner-north as a mass of cold air sits over Australia's south-east.
The hail hit the area about 1pm, following heavy rain.
ABC Radio Adelaide producer Natasha Thiele filmed hail falling in her backyard at Sefton Park.
"I cannot believe the hailstones — not huge but little, like normal size — however thousands and thousands and thousands and then it sort of doubled in strength. I sort of can't believe it," she said.
Bureau of Meteorology senior forecaster Simon Timcke said the hail had been forecast and it was possible there could be more today.
"Look, there's nothing on the rad right now but the atmosphere remains cold enough to produce that again. It wouldn't be impossible," he said.
A warning for sheep graziers is current across most of South Australia.
It warns of cold conditions, showers and fresh south-westerly winds that could lead to sheep and lamb deaths.
Hailstorms north of Adelaide caused significant damage to glasshouses, cars and other properties last spring.
