A traveler reads a flight tracking board showing numerous cancellations at Dallas Fort Worth Airport on Monday, Feb. 23, 2015. (AP Photo/The Dallas Morning News,Jim Tuttle)

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DALLAS (AP) — A late-winter storm has reached parts of Texas with hundreds of flights canceled and some schools closing early.

Lubbock and Amarillo were under a winter weather advisory until midnight Wednesday with a slight chance of snow. The National Weather Service issued a winter storm warning for the Dallas-Fort Worth area through mid-Thursday.

Flightaware.com reports more than 600 flights were canceled Wednesday at Dallas-Fort Worth International Airport.

Fort Worth-based American Airlines canceled more than 550 flights Wednesday system wide. Spokeswoman Andrea Huguely (HEWG’-lee) says weather-related problems were mainly in North Texas, the Philadelphia and New York City areas and in Nashville and Memphis, Tennessee.

Dallas-based Southwest Airlines canceled fewer than 90 flights.

Some school districts in North Texas were letting out early Wednesday due to the threat of wintry weather.

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