As of 1:00 PM CST, there's several large bands of severe thunderstorms moving through southeastern Michigan, including Detroit. Here's a radar capture as of 12:50 PM:
Today's Rangers/Tigers game was due to start at 12:05 PM. These storms are moving relatively slowly at only 25 MPH, and while there will be a short break after this first band of storms moves through, the second band looks much more nasty.
Right now, I think we're looking at a best case scenario of a 2:30 start, and I honestly wouldn't be surprised if they didn't get this game in. You also have to keep in mind that after the storms pass, it'll take at least 10 to 15 minutes for the groundscrew to prepare the field for play.
UPDATE: Today's Rangers/Tigers game has been postponed and rescheduled as part of a day-night doubleheader on September 11th. I hate to see a rainout and the possibility of it breaking the Rangers' momentum, but then again, I thought Sunday's loss would crush their confidence, and that obviously didn't happen.
Texas hasn't had an off day since June 18th, and won't see their next one until July 9th, so this may be a blessing in disguise. Supposedly, the reason for playing this game today was that the 2007 International Freedom Festival Fireworks was taking place tonight in downtown Detroit, and the Tigers didn't want the two events conflicting. Ironically, that event is now in serious jeopardy of being postponed, as well.
Looking at the latest radar images, it doesn't look like the storms are going to move out of the Detroit area until at least 3:00 PM, and I suppose you can only ask your fans to wait through a rain delay for so long before making a call one way or the other.