American Airlines has issued a travel alert on Tuesday to give passengers flexibility who were impacted by a technical issue on Christmas Eve. The airline said a “vendor technology issue” caused a temporary grounding of the airline’s flights on Tuesday morning during the busy holiday travel season.

The Federal Aviation Administration said American Airlines requested a ground stop for all of its flights for one hour early Tuesday, Dec. 24 due to a “vendor technological issue.” On top of that, thunderstorms are expected to roll in before noon. The Fort Worth area is already under a flash flood warning until 11:30 a.m.

American Airlines briefly grounded flights nationwide Tuesday due to a technical issu e just as the Christmas travel season kicks into overdrive and winter weather is threatening