UFO identified as balloon in San Gabriel 1955

Summary

A civilian observer in San Gabriel, California, spotted a round white object on May 19, 1955. The object was moving westward, gaining altitude, and eventually faded away. The sighting lasted about five minutes without photos. Investigators concluded it was definitely a balloon.

This case, although brief, shows how UFO reports were often resolved with simple explanations. The lack of additional data and the clear identification as a balloon closed the case without further investigations.