Nearly a thousand flights have been cancelled in New York Tri-State area as another winter storm is sweeping into the region.

According to Flight Aware website, until 10:40 a.m., 863 flights have been cancelled and 160 have been delayed in the three airports in New York Tri-State Area.

The National Weather Service has issued a winter storm warning for New York City, Long Island and areas of New Jersey until 7 p.m. Thursday, predicting snow accumulations of between 4 and 7 inches.

The National Weather Service says 4 to 8 inches of snow are possible in parts of New Jersey before the snow ends late in the day.

The New York City Office of Emergency Management has issued a hazardous travel advisory for the morning rush, warning of dangers on the roads caused by reduced visibilities, icy roads and snow accumulations.

New Jersey Governor Chris Christie has declared a state of emergency and is asking motorists to stay off the roads if possible.

New York Tri-State area has experienced frequent snow falls this winter, and rare severe cold weather with temperatures dropping to 10 degrees centigrade below zero for consecutive days in February.