Unknown over St. Louis (University City), MO

The report, as filed

I was walking around the park with my son ,we were looking at clouds,trees,i was showing him the deference in clouds and the diferenr kinds of seeds each tree makes. As we come full circle around the park look up at the clouds and happen to notice an object hovering almost over us in the sky. It was higher then the trees but under the clouds. It was as hight as you would exspect a helixopter to be and about the same size of one with out the tail propeler. It rotated about 45 degrees, then it descended slightly, rotated again i could see heat wave coming form under the back of it and it looked as it had a small blue flame like jet purpoltio. Coming from it that made it illuminate a light blue. It moved forward about 29ft the started to elelvate until it vanished in the cloud. After the cloud had past it was gone, just disappeared. It made no sound at all

Held as-reported from National UFO Reporting Center (record NUFORC #147840). Witness text is preserved verbatim, including its spelling; nothing is edited beyond formatting.