Niagara Falls looks stunning covered in ice. Onlookers in Ontario and New York are marveling at the site of the frozen falls, spreading pictures widely across the social media landscape.

But while the photographs look beautiful, the ice-laden waterfall is not all that surprising, at least according to one meteorologist.

"The falls aren't frozen over," says John Rozbicki, a meteorologist at the National Weather Service. "There might be some ice on it, but the water is going to continue to flow underneath."

According to Rozbicki, Niagara Falls has too much water to completely freeze over. But it has on several occasions formed an ice bridge over the lake, which is located beneath the waterfalls.

Historically, visitors were allowed to walk across these ice