NOTE: This story originally ran March 9, 2016. Is it a bean bag that lost its beans? How about a hairy blueberry? That's it. No, more like a rain cloud wearing gloves? Actually, it's Stephen ...

Think of it as a dense blob of air. When it parks itself over the Pacific Ocean, it can act like a wall – and prevent rain from reaching California.

The torrential rain plaguing Australia’s southeast is here to stay for at least a few more days as a “warm blob” in the sea fuels more storms for NSW and Victoria.