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Canadian Clipper Brings Deep Freeze in U.S.

Sukhui Case makes her way up slippery snow covered stairs from the beach as Tim Pisone looks on at the Bogue Inlet Fishing Pier, Saturday, Jan. 22, 2011 in Emerald Isle, N.C. A rare snow is piling up on the North Carolina beaches, and forecasters are warning residents along the rest of the East Coast to be prepared for even more snow. (AP Photo/The Jacksonville Daily News, John Althouse)
AP Photo
The forecast for the AFC and NFC Championship games in Pittsburgh and Chicago on Sunday is: cold and colder.

In Chicago, where the Bears take on the Green Bay Packers at Soldier Field, the temperature is expected to be in the upper teens by kickoff. The thermometer might reach the teens as the Steelers face the New York Jets in Pittsburgh.

Blame it on a Canadian clipper, a cold air mass pile-driving its way into the United States from the province of Alberta.

In some parts of New York state, organizers are canceling winter festivals and meteorologists are warning residents to stay inside.

Meanwhile, a rare snow has been piling up on the North Carolina beaches. Forecasters are warning residents along the rest of the East Coast to be prepared for even more snow from a strengthening system in the Atlantic.