I just saw another one at 3:58 PM CT (the exact same time I saw it yesterday). I haven't seen it on any other LF except for the 3:58 PM CT. Maybe it only runs on this LF because it's around the hottest part of the day?
EDIT: Looks like Mike already checked the 3:58 PM CT LF on his STAR, so that rules out the above theory. I hate to jump the gun here, but maybe it's being beta tested on a few STARs, since no one else is seeing it but me?