A teenager has been rushed to hospital with serious chest injuries after a tree fell on her car during the morning rush hour in Adelaide.
The woman, 19, was driving along Greenhill Road at Unley when the tree fell in windy weather and trapped her in the vehicle, about 8:15am ACST.
The road emergency disrupted east-bound traffic while the woman was freed from the vehicle.
Anne-Marie Hammond was nearby and says she heard a loud crack before the tree fell and also brought down a light pole.
"Fortunately she didn't have a passenger on board or they wouldn't be here," she said.
"The tree had pierced straight through that seat and into the rear seat.
"She was fortunately able to move herself a little bit, so she really only got caught on her left-hand side.
"She was lucky that the light pole hit the car and bounced back off otherwise she might have had to deal with that as well."
The Royal Adelaide Hospital later said the teenager was in a stable condition.
A severe storm is being forecast to hit Adelaide by the late afternoon.
Wind gusts already have reached up to 70 kilometres per hour on Eyre and Yorke Peninsulas, further west in South Australia.
Vince Rowlands from the weather bureau says the Mount Lofty Ranges in Adelaide's eastern region can expect about 100 millimetres of rain over the next two days.
"I think the Mount Lofty Ranges certainly in this case will see the highest falls, behind this front we've got some pretty cold air coming through so there is potential there for some thunderstorm activity and some small hail," he said.
© ABC 2014
23:22 EDT A south-west Queensland grazier has captured on camera the moment a "rain bomb" dropped from the sky.