Once the snow starts to come in, the temperature will essentially drop like a rock,” Fox Forecast Center Meteorologist Marissa Lautenbacher told The Post.

New York City prepares for severe winter conditions with heavy snowfall and a deep freeze expected this weekend. Temperatures could feel as cold as 15 degrees below zero with wind chills potentially reaching-15 degrees.

After days of balmy weather, New York City is slated to get buried in snow and then hit with an arctic blast expected to unleash a potentially life-threatening chill. With a frigid polar vortex set to grip huge swaths of the U.