It's already walloped parts of Oklahoma and Arkansas and led to the cancellation of nearly a thousand flights in Dallas.
With storms moving up and down the east coast, travelers are keeping a close eye on conditions.
Three million people are expected to move through the nation's airports this week, with Wednesday and Sunday ranking as the busiest days, and of the 43-million traveling in the next few days, 90 percent will be driving.
Read more: http://nbcnews.to/1aVY00Q
Copyright 2017 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.