All I know is, according to SportsCentre this morning (the world's most reliable source for news...), many flights were being diverted to Buffalo (and they said it's quite pathetic when that happens; BUF
residents, complain to John Anderson and Steve Berthaume).
As for planes going out empty, I doubt it. They are all probably going to go back down to BWI
was your final destination, I would think Southwest would let you off there).