A really amazing testimony of bright orbs of light moving about the sky has been submitted to MUFON (case 83422). Although there were no photos or videos taken, the witness description is very similar to often-documented cases of "dancing" orbs that tend to show up during unusual weather events, like during, before and after the March 2011 tsunami, and even above volcanoes. These orbs are so common they have names, like "spirit orbs," and are even sometimes attributed to natural phenomenons like "earthquake lights" as well as "ball lightning."
Considering that the orbs in Waco were seen a day before the destructive and deadly tornado that swept through a town two hours away, I think is worth comparing.
Group of white dots moving fast followed shortly by a smaller group of the same. All disappeared at the same spot in the sky as if going behind a curtain.
March 2011 in Japan:
Do you live in Waco? Did you also see these lights? Report your sighting!