This is interesting. Watch this short video (not able to embed) from the good guys at AccuWeather and early in the segment they show a map that illustrates the “historical chance of a white Christmas” for the entire continental U.S. If you look carefully you will see that Houston is on the cusp of “none,” or no chance.
I guess they should have asked about their chances for snow in the nation’s 4th-largest city on December 4th. Of course this is not evidence that discredits global warming trends. After all, it’s only a local event, and localized phenomena are only capable of proving global warming, not disproving it.