As someone who is an outspoke critic of AA, today's cancellations were related to low cloud ceilings in the Philadelphia area, and lack of visibility with planes trying to land their. So, we can't actually pin this one on them. It sounds legit. There may also be maintenance issues, as well. Either way, they'll book you on another flight probably tomorrow, and if they say there is no room complain and maybe you'll get first class. That actually did happen to me once when I flew from Pittsburgh to Kansas City.