(CNN) — Holiday travelers in the United States avoiding widespread disruptive weather ahead of Thanksgiving might not be so fortunate during their post-holiday journeys.

A new storm that will first impact the Pacific Northwest by Thanksgiving night is expected to morph into a full-blown, cross-country storm with the potential to dump heavy rain and accumulating snow across more than 1,000 miles of the country this weekend.

CNN’s Jennifer Feldman contributed to this report.

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