Winter weather continues to hamper travelers returning from Thanksgiving destinations, as a new storm system forms in the Mid-South.

Forecasters say the developing system is taking shape Monday near the intersection of Arkansas, Louisiana and Texas. They predict snow across much of the northeastern United States this week, with heavy rain expected to fall to the south.

The new system follows one that snarled travel over the weekend.

As post-Thanksgiving travel continued, dozens of flights in South Florida had also been delayed on Sunday morning at both Miami International Airport and Fort Lauderdale-Hollywood International Airport.

“Winter weather can always be impactful, but this is definitely one for the books,” said Katy Nastro, spokesperson and travel expert for Going.

Indiana State Police said 45 vehicles were involved in a pileup Saturday, though no major injuries were reported.

Delta Air Lines said no one was hurt when one of its planes slid off a runway in Iowa on Sunday.

FlightAware reported roughly 12,000 delays and 1,000 U.S. cancellations Sunday, with Chicago’s O’Hare International Airport hit the hardest.

“We were pushed back because it was delayed for a couple of hours,” said traveler Rolanda Johnson-Shorter in Chicago. “Then we were able to get another flight. That one was delayed like another 30 minutes to an hour.”

FlightAware also reported delays at the world’s busiest airport in Atlanta.

“The concern is that the flight would be canceled,” said traveler Tara Tharpe in Atlanta. “If it’s delayed, we’ve got some family here on standby to come back and pick us up, so we’ll see how it goes.”

That’s despite Atlanta receiving no snow from the storm.

“The aviation system is really interconnected, and it can have a domino effect,” Nastro said. “You can be directly impacted even without being in the area that’s seeing weather.”

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