DALLAS (AP) - Christmas Eve weather-related travel delays hit Texas as a massive winter storm rolled through the nation's midsection.
The National Weather Service issued blizzard warnings for parts of the Texas Panhandle, Oklahoma, North Dakota and Minnesota.
An advisory Thursday for Houston's Hobby Airport cited weather problems and low visibility affecting traffic bound for the Dallas area, with delays topping two hours.
American Airlines, with its main hub at Dallas-Fort Worth International Airport, offered customers the chance to change their weather-affected flights Thursday with no penalty.
Dallas-based Southwest Airlines advised travelers to be aware of possible delays or cancellations, especially in storm-swept areas such as Minneapolis, Kansas City and Omaha, Neb.