How can you postpone a game when it isn't raining????

This happened to the Twins once a few years ago...was that vs the Yankees also?

Anyway, tonight was supposed to be the 4th game between Detroit and New York, and Detroit has a 3 game lead.

So...the spectators had been in their seats for an hour - an hour in which it did not rain- and then they were told to go home because it might rain.

So the game has been postponed to tomorrow...

And it still isn't raining!!!

How stupid is that?