I missed the big meteorite the other night, but I see from this NPR interview that it must have been about a yard across and packing the power of 100 tons of TNT:
Meteors this small typically are broken apart. This one, if you look at what information we have, Doppler radar picked up pieces of this meteorite descending. So you actually got echoes on Doppler radar which showed a trail. And those are tiny particles of this meteorite after it broke apart, descending to the ground.
SIEGEL: So, does that mean that there really is no place where we would find the impact of this meteorite on Earth because it broke up or is there some place where at least a big rock hit the Earth last night?
Mr. COOK: There are no craters, but I guarantee you there are little pieces of meteorite scattered on the ground somewhere in Wisconsin. But no really big piece, no smoking crater.