Simpson's grandmother had to spend the night at the same hospital, with one arm left "completely black" from bruising and one arm left with the skin "shredded" from the incident.
She described covering her baby with her body when the windows blew out, leaving her back, arms and head badly bruised.
Fiona Simpson, a 23-year-old Australian woman from Queensland's Kingaroy town, went into full-blown mommy mode on Thursday as she threw herself on top of her four-month-old daughter to shield her from hail that was pouring through her busted auto windows.
"I've learnt my lesson today, NEVER drive in a hail storm!" she captioned the photos.
Simpson told the outlet that she quickly pulled her vehicle to the side of the road to wait out the storm - but that it quickly became apparent that the threat was still imminent. "I covered my infant with my body to stop her from getting badly injured". The storm has had a devastating effect for farmers and it has been reported that an entire season's worth of barley, wheat and melon crops have been destroyed. The storm also reportedly ripped several roofs off homes and knocked birds out of the sky.
The tornado first struck Tansey, a small town around 250km to the north of Brisbane, at 3pm yesterday.
He said: "We ran inside and everything was going sideways, all the trees were going sideways, this roof went up (in the air) and down".
When a back window was shattered, she leapt into the back seat and put her body between her baby and the large hailstones raining down on them.
"Next door to me is the old abattoir and that whole shed has imploded inward and the whole end of it was taken out as well", she said. I've stopped crying but there's worse things that can happen. "We are still all OK", she told the broadcaster.
Aside from hailstones, the powerful storm sweeping across the region saw winds reaching 60 miles per hour that brought down trees and power lines.