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Archive case record

Sioux City, Iowa, January 1951

Date of account
1951-01
Location
Sioux City, Iowa
Source
uap_archive
Record updated
2026-10-10

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Record summary

Project Blue Book case file indexed from National Archives metadata; page-level review pending.

Published source text

Read the available text below. Archive transcriptions may contain OCR errors; later context is labelled separately. A recorded claim is not a finding that it happened.

Source page 1

Source text · mention only

PROJECT 10073RECORD CARD 1.DATE 2.LOCATION 12.CONCLUS1ONS 口 Wos Bolloon Sioux City,Iowa 20_Jan..51 口 Probably Bolloon 口 Possibly Balloon 3.DATE-TIME GROUP 4.TYPE OF OBSERVATION Ground-Rodar Wos Aircrafr Locol Ground-Visuai Probably Aircrof? GMT_ Not reported BAir-Visuoi Air-lntorcopt Radar 口 Possibly Aircraft S.PHOTOS 6.SOURCE 口 Was Astronomicai OYes Airline Pilots Probobly Astronomical No Multiple Tower operators 口 Possibly Astronomicol 7.LENGTH OF OBSERVATION 8.NUMBER OF OBJECTS 9.COURSE 口 Other. 口 InsufficientDataforEvaluation V, min Varied 口 Unknown one 10. BRIEP SUMMARY OF SIGHTING 11.COMMENTS Evaluated asB-36 a/c CAsc3 F PRaJet BiceBerRpoer COETFICOINIqT ATIC FORM 329(REV 26SEP 52)

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