Meteorologists don't have the specific forecast ready yet, but there is a growing consensus that December will be a frigid one for parts of the United States.
The National Weather Service's Climate Prediction Center says colder-than-normal weather is most likely in the northern and northeastern United States, but some forecasters say a complex dance involving the polar vortex could send some of the coldest weather on Earth toward the US.
"My thinking is that the cold the first week of December is the appetizer and the main course will be in mid-December," said climatologist Judah Cohen, a research scientist at MIT, in an email to USA TODAY.
Indeed, according to Cohen's computer model, "which I can credibly claim as the world's best – is predicting that the most expansive region of most likely extreme cold on Earth stretches from the Canadian Plains to the U.S. East Coast in the 3rd week of December."
As for snow, that remains a wild card, as the weather systems that produce snow typically can't be predicted more than a few days in advance. Suffice it to say that having cold air present is half of the battle.
