Apparently JFK is currently closed due to a cargo aircraft skidding off the runway. It's been snowing pretty hard in the north east so it's not suprising. A lot of aircraft holding. The aircraft is a 747 and it could be hours before it's moved. JFK is below minimums right now.
Lots of diverts to Boston but KBOS is not accepting more due to lack of ramp space. Several planes declaring fuel emergencies in order to get in. Most don't have spare fuel to reach an alternate. Snow is starting to crank up here.