Forecasters tweaked their snowfall predictions several times Wednesday as another powerful winter storm slammed into the Northeast, but many airlines weren't taking any chances.
Airlines canceled more than 2,400 flights scheduled to or from major airports in the Boston, Philadelphia and New York area, according to flight-tracking site FlightAware.
More than half of the scheduled departures, 353 flights, from Newark Liberty International Airport were canceled. The airport is large hub of United Airlines. Carriers canceled 342 flights from LaGuardia Airport and 266 from John F. Kennedy International Airport, according to FlightAware. A similar number of flights to those airports were also canceled. Airlines canceled more than 320 flights were canceled to and from Boston Logan International Airport.
Most major airports in the Northeast were operating with minimal delays, despite the cancellations, according to the Federal Aviation Administration. Newark's airport closed briefly Wednesday afternoon and inbound flights to Philadelphia International Airport were delayed because of ice and other poor weather conditions.
Airport officials warned travelers to check with their airlines before heading to the airport.
While forecasts are still changing, airlines often cancel flights ahead of severe weather to avoid stranding crews and passengers, which can lead to even bigger logistical headaches.
WATCH: Second nor'easter in a week takes aim at the northeast