UFO sighted in Alameda in 1955

Summary

A round, silver object the size of a pea held at arm's length was observed for 30 minutes in Alameda, California, on May 19, 1955. Witnesses saw it stationary before slowly rising and fading from view. The duration of the sighting and the object's behavior led investigators to consider it likely a balloon. Despite the lack of photographs, the detailed description and testimony from three people supported this conclusion. No further investigation was authorized, but the case was filed under number JUPIL 470.

The report includes weather data and the exact location of the sighting, with precise geographic coordinates. Witnesses such as Early N. Stone and other local employees provided their testimony without revealing further personal information. Although no official action was taken by air authorities, the case was classified and archived in the intelligence system of the time. The object was not intercepted or photographed, but its description and upward movement are consistent with a weather balloon.