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Flights into Philadelphia are being delayed by nearly two hours on average, due to low clouds. Flights into JFK and LaGuardia are being delayed by nearly an hour, according to FlightAware.com.
Those delays will lead to more problems across the country, as FlightAware's Misery Map shows. Holdups at the New York airports have an especially large impact. Here's how it looked just after 10 a.m.: