And even with delays likely expected, Ellzey said it would take extreme weather to shut down a major U.S. airport like DFW: A blizzard with high winds, a major power outage or "zero-zero" visibility conditions, meaning fog is too heavy for pilots to see above or in front of their aircraft.

Parts of North Texas have already seen a significant amount of snow, with more expected in the coming hours. Snow has been falling in Denton and Collin County for a decent amount of the day, while Tarrant County and Dallas County have seen less snow. Areas like Celina and Bonham saw a reported six inches of snow by 5 p.m.

Travel impacts and school closures continue Friday, though weather conditions are expected to improve later in the day.