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Third Winter Storm in as Many Weeks Hammers Northeast

A relentless, multi-day snowstorm was blowing through the Northeast early Monday.

The third winter blast in as many weeks triggered a messy commute for millions as well as more than 1,600 canceled flights.

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The Weather Channel warned that ice and sleet would pose a major hazard for commuters in New York City and southern New England, while upstate New York and the rest of New England could see more than a foot of snow accumulate by the time the storm is done on Tuesday morning.

Even when the snow is over, there will be no respite for the shivering region. The Midwest and Northeast are set to endure icy temperatures all week and into next weekend.

The coldest air of the year will move across the Northeast on Friday.

"In Boston it will stay below freezing for possibly 15 days or more — which could have us looking at the record books," Weather Channel lead meteorologist Kevin Roth said.

More than eight inches of snow fell at Boston's Logan Airport during Sunday, the National Weather Service said, with three more inches expected on Monday. That's on top of the foot or more still piled up on the roadsides from last week's pounding.

The Massachusetts Emergency Management Agency warned that travel conditions would be dangerous from Sunday night to Tuesday morning, and Boston Mayor Marty Walsh announced Sunday that public schools would be closed both Monday and Tuesday.

"I'm frustrated ... I want to move on to something else," Walsh said Sunday. "It's unprecedented ... Maybe up in Alaska or Buffalo, they have this amount of snow and they're used to it."

At least 1,693 flights were canceled by 4 a.m. ET Monday, with Boston Logan, New York La Guardia, New York JFK and Newark the worst affected, according to Flightaware.

While New York City will escape significant snowfall Monday, freezing rain was expected into the afternoon, Roth said.

The Associated Press contributed to this report.