Hundreds of flights have been canceled at New York’s major airports as a significant winter storm descends on the city and neighboring regions.

New York City is in line to get 5 to 9 inches (13 to 23 cm) of snow between 4 p.m. Friday to 1 p.m. Saturday, local time, according to the National Weather Service.

Some 566 flights across the US had been canceled as of 6 a.m. on Friday, according to the FlightAware website. Of those, at least 389 were flying into or out of New York City’s three major airports – LaGuardia, JFK, and Newark. Detroit and Boston airports also saw cancellations and delays.

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Dallas-area airports only have a handful of cancellations Friday, most from flights from the Northeast, according to Flightaware.com.

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New York City issued a travel advisory for the duration of the storm as cold temperatures limit snowmelt, increasing the risk of slippery and hazardous road conditions.

The winter watch extends into Philadelphia with the storm expected to move offshore into the mid-Atlantic by Saturday morning, the service said. Wintry precipitation will give way to freezing rain as the storm moves south.

A potentially stronger cold front will move across the Northeast, including the Washington area, toward the end of the weekend, which could lead to blustery conditions during the last few days of the year. Parts of western Pennsylvania may be hit by an ice storm, which could cause power outages and make travel hazardous, the National Weather Service said.

Further north, Toronto has a snowfall warning in effect, with 2 to 4 inches of snow and winds gusting to 31 miles per hour (50 kmph) expected, according to Environment and Climate Change Canada.

– Naureen S. Malik and Brian K. Sullivan for Bloomberg

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