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Archive case record

Sioux City, Iowa, March 1950

Date of account
1950-03
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 1.DATE·TINGRCUP 2.LTION Sioux City,Iowa 30March5030/144Oz 3.SOURCE 10.CONCLUSION Civilians Possible Balloon. 4. .NUMBEROF OBJECTS Erratic cotion, ono obcerver thcught object a balloon. Color One and Mlight in cccord with thio ovaluaticn. S.LENGTH OF OBSERVATION 11. BRIEF SUMMARY AND ANALYSIS 10 vinutes Silver spock cbservcd thrcugh fiold glassos while cbcorvers wery 6. .TYPE OF OBSERVATION disappearing in tho Ws: into hazo.Ooservers wero to theSs.l of thy Ground-Visual (Bx) city. Descripticn of the object by the thrco witnoss was conrlitling Altitudo, high 20,coo ft.Shape slcndor,round, one reported wdgh 7.COURSE blunt wings. Cao thought might bo a Woather bailoon. Size sare as a plano at that altitudo.Color silver ar motallic sheen. Spced was slcw, hovering. 8.PHOTOS OYos LYNO 9.PHYSICAL EVIDENCE Y RNO FORM FTD SEP630-329 (TDE) Provloue oditlone of thie form mey bo u

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