Project 10073 Record Card and Incoming Message — 13 November 1958

This document consists of a Project 10073 record card and an associated incoming Air Force staff message regarding a series of unidentified aerial phenomena observed on 13 November 1958. The report details four separate sightings occurring throughout the day in the vicinity of Troy Peak and Tonopah Airport, Nevada. The objects were tracked by ground-based radar systems, specifically the FPS-20, MPS-7, and MPS-14, and were also observed visually. The observers noted that the objects remained in the same general area and at the same altitude, exhibiting a fairly stationary behavior or moving slowly in an east-northeasterly direction. The sightings lasted intermittently over an eight-hour period. Weather conditions were reported as clear and calm, with a notable temperature inversion recorded at 60,000 feet. The reporting officer concluded that the objects were likely weather balloons, citing their flight characteristics, which appeared to be consistent with drifting in the winds aloft. This conclusion was further supported by the observation of a weather balloon passing over the site at an unknown altitude. The report was filed in accordance with Air Force Regulation 200-2, which governed the reporting of unidentified flying objects at the time.