The FAA's Notice to Air Missions (NOTAM) system suffered a nationwide outage, grounding thousands of flights early Wednesday, Jan. 11, forcing the FAA to issue a nationwide ground stop. Over 4,000 flights were affected, with 1,500 of those being Southwest flights. Around 750 total flights were cancelled as well. The ground stop started around 7:15am Wednesday, with the restriction being lifted just shy of 9am. The DOT will investigate the outage.
