NEWARK - A number of flights scheduled to leave Newark Liberty International Airport Friday have already been canceled, according to Flightaware.com. 
 
The heavy snowstorm led to more than 600 cancellations into and out of Newark Thursday.  There were nearly 6,500 cancelations within, into or out of the United States as well.
 
Flights that are getting out of New Jersey are experiencing more than 30-minute delayed departures.
 
Passengers are urged to check with their airlines before leaving for the airport.