Transportation Security Administration officials said Sunday was expected to be one of the biggest travel days in the history of the agency.

A winter storm is expected to bring the Chicago area its heaviest snowfall in more than two years, with a Winter Storm Warning in effect from 3 a.m. Saturday through Sunday morning.

After a historic November snowstorm tore through the Midwest, leaving Chicago with nearly 9 inches of snow – the windy city's snowiest November day on record- it unleashed travel nightmares, with over 70 flights cancelled or delayed on Saturday.

A Winter Storm Warning is in effect in the Chicago area until Sunday morning. A snowstorm is expected to bring up to 8 inches in some areas.

A major weekend snowstorm is set to bring 6 to 12 inches of snow across Chicagoland, followed by dangerous cold next week.

A ground stop has been issued at Midway International Airport and Chicago O'Hare International Airport as the major snowstorm continues to disrupt travel. FOX Weather Meteorologist Jane Minar breaks down how the nation's airports are affected by the flight halt and how the implications could extend through the weekend.