NEW YORK (AP) — A powerful winter storm that’s been tormenting travelers across the U.S. since before Thanksgiving moved to the Northeast on Sunday, packing one last punch of snow and ice as people head home after the holiday weekend.

The National Weather Service predicted more than a foot of snow in swaths of upstate New York and New England, as well as ice accumulations in parts of Pennsylvania.

The same weather system has been pummeling the U.S. for days as it moves cross country, dumping heavy snow from parts of California to the northern Midwest and inundating other areas with rain.

The storm has been blamed for several deaths.

Two boys, ages 5 and 8, died Saturday near Patton, Missouri, when the vehicle they were riding in was swept off flooded roads.

The bodies of two children were found in central Arizona after the vehicle they were in was swept away while crossing a swollen creek. A third child is missing.

A 48-year-old man died in a separate incident near Sedgewickville, Missouri, and a storm-related death was also reported in South Dakota.

Major highways reopened Sunday in Wyoming and Colorado, a day after blizzard conditions clogged roads with snow drifts.

The city of Duluth, Minnesota, was blanketed with 19.3 inches of snow as of 6 a.m. Sunday. The city issued a “no travel advisory” at noon Saturday and deemed the storm “historic.”

As the storm shifts east, flight delays and cancellations are continuing to pile up — disrupting travelers heading home after Thanksgiving.

As of 10 a.m. Sunday, 80 flights were delayed and 7 were cancelled at the three New York City-area airports, according to the flight tracking website FlightAware.

The Federal Aviation Administration said some flights heading to Newark, New Jersey, are being delayed by an average of more than 2 1/2 hours.

There were also dozens of delays at airports in Chicago and Minneapolis.

At Denver International Airport, 100 flights were canceled Saturday because of high winds.