Monday, Sept 7, the PHL-LHR (DL 194) seems to have diveretd to JFK. I cannot tell if it has continued on toe LHR and why it diverted. Anyone know what is happening with this flight?

The flight let PHL at 9:21 PM and according to Flightaware is scheduled to land at JFK at 9:45 PM. What could be up? Why just leave PHL and land at JFK?

Thanks