NFL has contingency plans in place in case major snowstorm threatens Super Bowl XLVIII
The NFL’s VP of events, Frank Supovitz, said Wednesday that the game could be moved to Saturday or pushed back to Monday or Tuesday (or the following weekend) if a devastating storm hits the area.

I don’t see the problem in this… I have a feeling it’s going to be a light flurry during the game. It will look awesome on TV and the ratings will be through the roof no matter who is playing in the game. It’s something different for the NFL’s biggest game.