Clear Lake, South DakotaNovember 1956

Insufficient Data

Summary

On November 27, 1956, a civilian saw one object over Clear Lake, South Dakota. The object was watched for about one and one half hours, with the eyes and through binoculars.

The report described an egg shaped object that changed from red to green. It was the size of a grapefruit at arm's length. It was first seen at 30 degrees elevation and 270 degrees azimuth. It changed directions fast with no set pattern and was still in sight when the report ended. A related report from nearby Kadoka described a round red, blue, green, and white object watched for a similar length of time.

To gather more information, the Air Force sent follow up forms to the witnesses on November 29, 1956. The case was listed as insufficient data while results were awaited. Project 10073 was the Air Force's official record system for reports of unidentified flying objects.

Reported location

Clear Lake, South Dakota

Date of incident

November 1956

State / country

SD / US

Page count

3 scanned pages

USAF evaluation

unknown

Microfilm

T1206, Roll 26

Original case file scans

Original case file · scanned by NARAPage 1 of 3

View transcribed text

| ME is Urus INDEX. CAKY ’
: x : —— —
1 1. DATE 2. LOCATION 12. CONCLUSIONS .
i 27 2 Nov $6 Clear Lake, South Dakota O Woes Balloon
! o Probably Balloon :
3. DATE-TIME GROUP + TYPE OF OBSERVATION 0 Possibly Balloon
27/06552 Rov 56 ® Ground-Visval O Ground-Rader 5 Ny Aivarelt
0 Air Visual O Air-Intercept Radar 0 Possibly Aircraft )
5. PHOTOS . SOUR 0 Wes Astronomical
O Yes O Probably Astronomical
No | Civilian | O Possibly Astronomical
7. LENGTH OF OBSERVATION 3. NUMBER OF OBJECTS | 9 COURSE Ee ery
| - 1 ian pp Data for Evaluation
One and one half hours One Unknown
10. BRIEF SUMMARY OF SIGHTING 11. COMMENTS :
a red to green egg-shaped object, the in order to ob information
size of a grapefruit at arm's length. Object concerning this ing, ATIC Form 16L
| was first seen at 30° elevation, 270° asimth.| Vas sent to the source on 29 Nov cb.
Object changed directions fast--no set pattern Results of lysis of returned form
Objext was still in sight after having been will be cated in Monthly UFOB |
observed visually and through binoculars for -| E | |
1% hourse jo? : - | ‘ov ‘ |
AISOP Form 5 (15 Oct 54) | |

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Source: National Archives Catalog · NAID 28968471