Oxford, PAOctober 1955

On the morning of October 3, 1955, a school bus driver and civilian pilot near Oxford, Pennsylvania saw an unusual object in the sky. The man, standing beside his car on the northern edge of town, first thought someone had jumped from an aircraft with a malfunctioning parachute. The main object resembled a cigar standing upright, colored dull white or aluminum. It hung in the sky about 70 degrees above the horizon, an estimated 40 miles away at roughly 40,000 feet altitude.

For about twenty minutes, the object drifted slowly southeastward at 40 to 50 miles per hour, moving with the wind and showing no visible means of propulsion. A small puff of smoke or gas briefly appeared near its base, then vanished quickly. The observer also spotted two much smaller dark specks nearby. One moved northward for roughly fifteen minutes before fading from sight. The second moved westward and disappeared after about seven to eight minutes. The observer estimated the main object's size as roughly a five-inch pencil held at arm's length. The day was clear with only slight haze.

The Air Force investigated by contacting weather stations, aviation authorities, and military bases across the region. Officials at Greater Pittsburgh Airport reported that weather balloons (radiosondes, instruments carried aloft by balloon to measure atmospheric conditions) are released regularly from their station. However, meteorologists noted that winds at the time blew from west to east, making it unlikely a Pittsburgh balloon would drift eastward to Oxford. Naval air stations reported no blimps aloft that day.

The Air Force concluded the sighting was probably caused by a weather balloon from Greater Pittsburgh Airport, despite the unfavorable wind direction. Officials noted the object's description and silent, wind-driven motion matched a radiosonde balloon's characteristics. They also pointed out that no other witnesses reported the object, which they took as a sign it was a known, identifiable craft rather than something truly anomalous. The full case file is reproduced below as held by the National Archives, 11 pages.