Foul weather came just in time to bedevil holiday travelers in parts of the country.
A snowstorm forced the cancellation of more than 50 flights at Chicago's O'Hare International Airport. Low visibility also caused delays of up to 90 minutes.
Flights arriving at and departing from New York's major airports were delayed an average of three hours.
Winter weather also created travel problems in Colorado. Snow and ice closed parts of eastbound Interstate 70 through the Rocky Mountains, and at least four people were injured in separate accidents on icy roads, authorities said.