Declassified UFO / UAP Document
PROJECT 10073 RECORD CARD — 10 December 1957
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AI-Generated Summary
A civilian police officer reported a hovering, flashing yellowish object in Wisconsin on December 10, 1957. The Air Technical Intelligence Center concluded the object was likely a weather balloon based on wind drift calculations.
This document is a Project 10073 record card detailing a UFO sighting reported on December 10, 1957, by a civilian police officer in Wisconsin. The witness observed a single, round, yellowish object that appeared to be hovering for approximately 30 minutes. The object was described as having a light that flashed on and off. The sighting occurred at night under clear, hazy conditions. The official investigation concluded that the object was likely a weather balloon. Supporting documentation, including a teletype message, indicates that a balloon was released from La Crosse at midnight. Given the wind speeds of 40-45 MPH and the distance of 110 miles between the release point and the observer, military analysts determined that the balloon would have drifted over the sighting location at the time the report was made. The record card includes handwritten annotations confirming the assessment that the object exhibited 'typical balloon characteristics.'
Typical balloon characteristics
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Official Assessment
Probably Balloon
The sighting was attributed to a weather balloon released from La Crosse at 12:00 midnight. Based on wind speeds of 40-45 MPH and a distance of approximately 110 miles, the balloon was calculated to be over the sighting area at the time of the report.
Witnesses
- [illegible]Civilian Police OfficerWisc State Police Force