The bitter chill blowing across much of the country this week has forced a number of tracks to cancel racing cards, headlined by The New York Racing Association’s announcement that Aqueduct will not run its scheduled Thursday card. In addition, training at both Belmont and Aqueduct and the Belmont Café simulcasting center will be closed Thursday. Charles Town, which had already canceled Wednesday’s races, is also postponing Thursday’s card, as is Laurel Park. Penn National previously announced the cancellation of its live racing from Wednesday through Saturday.