I have a flight on Wednesday morning out of OKC on Southwest. Based on the news reports, it looks like we're going to get major snow here beginning at midnight on Wednesday (possibly earlier). This storm is supposed to be similar to the one we had last week and most likely will result in flight cancellations at OKC.

Does anybody have any experience with Southwest on how early they will cancel their flights? My understanding is that Southwest will allow you to rebook an earlier flight for free if yours is cancelled. Any help here would be appreciated.