A young woman is thought to have frozen to death after storming out of a party in Milwaukee, USA.

Elizabeth Luebke's body was discovered by a passer-by at around 9am on Sunday.

A medical examiner's report said the freezing conditions were likely to have caused the 21-year-old's death.

She had been at a party a couple of blocks away before leaving at around 3am after getting into an argument. The report said she had been drinking.

Surveillance footage from a business showed Miss Luebke collapsing in front of a property at around 4.30am. She was not wearing a coat, although a fleece jacket was found near her body.

Her mother, Kathryn Luebke, reportedly came upon the scene while police were investigating after going to look for her daughter.

Brit Hofslein told TMJ4 she spotted Miss Luebke's body face-down in the snow.

"I was looking at the houses and I saw steam smoke coming out knowing how warm it is inside of my car right now and she's laying out there on the ground," Ms Hofslein told the station.