NYC is facing the coldest weather in a while, and New York and New Jersey could be in for a White Christmas with snow on the way.

A White Christmas in upstate New York is looking more and more likely. With several inches of snow already on the ground, it isn't a certainty, but is certainly likely, said Meteorologist Bob Hamilton of the National Weather Service in Buffalo.

First, let's define our terms: according to the National Weather Service, a white Christmas happens when there is one inch or more of snow on the ground on the morning of the holiday.