The National Weather Service has issued a winter storm warning for heavy snow for Long Island and New York City.

The advisory is in effect until 7 p.m. Thursday. Weather officials predict snow accumulations of between 4 and 7 inches by the time it ends.

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The heaviest snow will fall early Thursday morning.

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Less snow is predicted for southern Westchester County. A winter weather advisory is in effect there during the same period.

Between 2 and 5 inches of snow is expected.