According to this story from WEAU out of Eau Claire, Wisconsin, the former president of the LaCrosse (WI) Area Astronomical Society thought that the fireball spotted in five Midwestern states was probably a stony meteorite, and the sonic boom heard was most likely caused by the meteorite going through the sound barrier. Also included in the story is a fascinating eyewitness account, and along with a video of the fireball shooting across the sky.

This morning as I was getting ready, I was listening to the Eau Claire, Wisconsin, news station and heard that what people were calling a meteorite (although they were not confirming that it was such a thing) was spotted rocketing through the sky in at least five states and that a sonic boom was also heard. The LaCrosse (Wisconsin) Tribune states that many from the area called in and witnessed a what they called a meteor explode and heard a sonic boom. The photo included in the article is quite a sight to see. Was it a meteorite? Was it a UFO exploding? The article states that there is a meteor shower going on at the moment, so it could be an explanation, but I will be very curious to