Are you looking forward to Chelsea vs. Manchester United? If so, I have some ominous reportage from Dan Levene:
Conditions sounds pretty bad in London, and it's not completely out of the question for the FA to move this fixture around - it's exactly what happened last year. At this point, I'm 50/50 about whether the match gets played at all. Obviously it's be in Chelsea's best interests to have the match postponed - their injury list presumably won't be nearly so bad if and when this got rescheduled (plus they might get their ACoN contingent back), but I'd hope that the only way the game is called off is if there's actually a real problem with getting to the ground.
Chelsea have a webcam set up so you can check the conditions at SW6, so keep an eye on it as we get closer to the supposed kickoff time.