According to Flight Radar and twitter reports a Bombardier CRJ 700 with the registration code N653CA declared an emergency at take off from JFK Airport on a flight to Raleigh Durham (RDU)
It shows the flight is on the ground, but did not arrive. What this means is unknown at this time. On the radar the flight shows operating for 37 minutes, but is facing 180 degrees on the runway in zero feet.
eTN will update.