NEWARK - The agency that operates New York and New Jersey's three major airports is bringing in extra personnel to work 12-hour shifts.
The Port Authority of New York and New Jersey says it's been a routine for many of this winter's storms.
The region is preparing for a mix of snow, sleet and rain starting early Thursday.
A spokesperson says the agency has more than 200 pieces of snow removal equipment at its airports. That includes melters that can liquefy up to 500 tons of snow an hour. The agency’s plows can reportedly clear snow at 40 mph.
Tracking service FlightAware shows that by noon, more than 3,000 flights for the day had been canceled. 
Hartsfield-Jackson Atlanta International Airport, the main hub for Delta Air Lines, led the nation this afternoon in flight cancellations with 1,633.

Delta is allowing customers expecting to travel through several Southeastern cities from Tuesday to Thursday to make free one-time changes to their itineraries. The waiver applies to travelers passing through Atlanta; the Carolinas; Huntsville, Ala.; and Norfolk, Va.