I believe its thunder or lightning. Weather.com says only a 20% chance of rain tonight in Lake Orion.

The weather forecasts indicate that it's just supposed to be cloudy the remainder of the day, and into the evening. The rain isn't supposed to return until overnight.

Pretty sure its the same as everyone else. Game would be delayed due to thunder/lighting. As long as you get a full half in, a game can be called as completed.
Rain shouldn't cause a postponement/cancellation UNLESS it's bad enough to cause poor field conditions that could be potentially dangerous to the players, etc.

The Bucks are now 7-0-0 and have the inside track to be the top seed in the Central Conference. This may be important, since the new Central playoff structure, the top seed overall gets a bye to the conference semi-finals, and probably gets the first chance to host. I say that, because if the top team hosts, that can be known by the Monday after the regular season, but if one of the quarterfinalists need to host, it would be determined on the Thursday after the QF games are played. http://pdl.uslsoccer.com/home/216806.html

So the main competition for the top seed are the St. Louis Lions (3-0-1), Chicago Fire (5-1-0), Toronto Lynx (2-1-0), Cleveland Internationals (3-1-1), and Thunder Bay Chill (0-0-0) [yes, they haven't played a game yet]. All other conference teams have at least two losses.