A young mother recommended for a bravery award after she used her body to shield her infant daughter from hail stones which broke in through the window of their car during a supercell thunderstorm says she's shocked by the gesture.

When asked during a press conference on Sunday, Premier Annastacia Palaszczuk said she would recommend the 23-year-old for the honour.

Prime Minister Scott Morrison also praised the mother's actions, saying he thinks "she's one of the bravest people I've read of lately".

Ms Simpson was driving from Nanango on the D'Aguilar Highway to her home on Thursday with her 78-year-old grandmother and 4-month-old daughter when the rain started to roll in.

She said she had not heard the warnings but knew she needed to pull her car over when the rain started getting heavy.

The window beside her daughter was shattered by the weather, showering the young girl with hail.

The quick-thinking mother leapt into the back of her car and acted as a human shield for her baby.

GRAPHIC WARNING: This story contains confronting images

After another window smashed in the front of the car Ms Simpson moved to try and help her grandmother but both women were pelted with large hail stones.

The experience left the young mother with significant bruising to most of her body. Her daughter had small "bumps" on her.

Her grandmother was admitted to hospital after most of the skin from her left arm was shredded while the other was left "completely black" from bruising.

She's since been released.

Speaking to ABC News, Ms Simpson said she didn't even know about the Premier's intentions until she was contacted by her local newspaper for comment.

"I was shocked … I didn't expect it that's for sure," Ms Simpson said.

"I wouldn't have thought anyone like that would know about little old me."

She said since her story was made public on Friday she's been inundated with hundreds of messages of support from around the world.

"I've tried to reply to most of them but every time I clear through my messages 50 more pop up," she said.

"People are offering to help, offering to send me ointments and creams, offering to buy me a massage, a few insurance companies have offered to replace my car.

"There's people from Norway, America, Canada, and a lot of people across Australia. There's a few ones in language I don't know. I honestly can't believe how quick it went around, I'm very shocked.

"A lot of people have been telling me their stories about accidents they've had … I didn't expect any of it to be honest."