Hurricane Sandy causes substantial flight cancellations in U.S. / International

flightaware.com reported thatover 3,000 flight cancellations so far as a result of Hurricane Sandy — details below:
707 flights cancelled to/from/within the US today. Most affected is Newark (EWR), a United hub, with over 265 cancellations today.
2,499 flights cancelled to/from/within the US tomorrow (Monday). Most affected is Newark (EWR), with 774 cancellations, second is Dulles with 428 cancellations, third is Philadelphia with 355 cancellations.
Although most air traffic control towers will close when the wind reaches 60-70kts, the big factor that will result in early flight disruptions is mass transit shutdowns and the availability of airline and airport staff due to their need to prepare for the storm. For example, NYC MTA is planning a 7pm train shutdown this evening. Another big factor potentially affecting coastal airports is high tide; LGA is the most likely big airport to close (only 4ft above high tide), followed by JFK. Read Article