A rare white Christmas in parts of the South was complicating life for some travelers as airlines canceled hundreds of flights, while snow was predicted for the nation's Capital and travel authorities warned of potentially dangerous roads.

The National Weather Service said the storm could bring more than 5 inches of snow to the Washington region Sunday. The Weather Service was also forecasting possible Sunday snow for the New York and Boston areas, with overnight temperatures in the 20s and wind gusts up to 30 mph.