NEW : Greyhound Lines scrubbed at least 1,700 flights Tuesday . NEW : Blustery bands of precipitation moved through the mid-Atlantic states Wednesday , threatening to bring snowstorms and blizzards to the Northeast . Flight-tracking website says 500 flights were canceled . American Airlines also affected by snowy roads , windy conditions . Travelers encouraged to check status of flights , bus , trains before leaving home .
NEW : Greyhound Lines scrubbed at least 1,700 flights Tuesday . NEW : Flight-tracking website says 500 flights were canceled . American Airlines also affected by snowy roads , windy conditions . Travelers encouraged to check status of flights , bus , trains before leaving home .