Nearly half of all flights in and out of DFW International Airport and Dallas Love Field are canceled with snow and sleet falling throughout the region and more expected through Thursday. The FAA issued a ground stop for all flights departing for DFW Airport from other airports,

Over 1,000 flights in and out of DFW International Airport and Dallas Love Field were canceled ahead of wintry weather.

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.