A high-impact winter storm packing heavy snow and rain has moved into the Northeast, leading to last-minute travel troubles as millions of people across the U.S. gather with family and friends on Thanksgiving to celebrate the holiday.

A powerful winter storm packing heavy snow, rain and even severe weather is set to snarl Thanksgiving travel in the eastern half of the U.S. after first walloping the West with winter weather that led to celebrations at ski resorts ahead of the holiday.

Millions of people in the eastern half of the U.S. from the Northeast to the Southeast will see some sort of Thanksgiving Day travel troubles as a high-impact winter storm brings heavy snow, rain and severe weather to the region.

A “dynamic mid-latitude cyclone” is spreading scattered showers and thunderstorms onto the East Coast on Thursday, according to the National Weather Service.