Tomorrow's game at Indiana looks like it could be messy
The current forecast has a 60% chance of thunderstorms from 11am-5pm in Ann Arbor with cloud cover over 92%. The temperature will be between 65-70 degrees.
While such games can be fun to watch, others are not (recall last year's Notre Dame game and the OSU game the season before). The rain will make gaining yards on the ground even more important.
The Wolverines have the definite advantage there, but given a perceived or real lack of size on the Wolverines DL, Indiana is likely to gain some yards on the ground as well with their Pistol attack.
The two downsides to playing in sloppy conditions are: 1) turnovers due to a slippery ball
In such conditions, the team who protects the ball and tackles the best will win.