Vigilance and preparation are important, say forecasters at the NWS, as wintry weather brings hazardous travel conditions.

A Southwest Airlines flight struck a bird and had to return to Tampa International Airport shortly after takeoff on Sunday, according to a SWA spokesperson.

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As of 10 a.m. Wednesday, Charlotte Douglas International Airport had 186 flights canceled and 102 that were delayed, according to FlightAware, an online website providing real-time information. FlightAware also reported that flights scheduled to come to CLT are being delayed at other airports by about an hour and 30 minutes.

Millions of Americans face an artic blast, including the first-ever blizzard warning for parts of the Gulf Coast.

Flights continued to be cancelled in the U.S. on Wednesday, as the historic winter storm that hit Louisiana, Texas and other Gulf Coast states continued spreading for a second day.

You're entitled to a refund if your flight is canceled for any reason, but other accommodations depend on the cause of the delay.

The Jacksonville International Airport reopened Wednesday at noon after the winter storm prompted its closure Tuesday evening.