The Colts are playing a tough game on Saturday. Besides playing the number one seed in the AFC in one of the best home field advantages in the league, they have to deal with the elements too. Those elements might not be too kind to either team.
As of right now, it looks like there is a good chance that it snows during the duration of the game. The snow will accumulate, as the Kansas City area is supposed to get 3-5 inches by Sunday evening. The game starts at 4:35 on Saturday, so that will be right around when it starts snowing.