The following exert is an eye witness statement. Please read into it what you will. This has been reported to mufon who I am sure are investigating:
I went outside on my back porch (north) to smoke and i glanced up at the sky and noticed a triangular cloud still above my yard. the night sky was partly cloudy with fast moving wispy clouds. this object was stationary relative to the other clouds. also, the strange cloud seemed more faint and off color from the rest of the clouds. it stayed in position for approximately 1-2 minutes before abruptly heading east northeast towards downtown st. louis. i finished my smoke and went back inside.