# July 7, 1947 — Arlington, VA — Blob Flying at 500′

**URL:** <https://uapdiscovery.discourse.group/t/july-7-1947-arlington-va-blob-flying-at-500/594>\
**Category:** Blue Book Unknowns\
**Created:** [July 7, 2026, 12:08am UTC](https://uapdiscovery.discourse.group/t/july-7-1947-arlington-va-blob-flying-at-500/594 "2026-07-07T00:08:31Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jeffknox](https://avatars.discourse-cdn.com/v4/letter/j/e47c2d/32.png) [@jeffknox](https://uapdiscovery.discourse.group/u/jeffknox)\
**Post date:** [July 7, 2026, 12:08am UTC](https://uapdiscovery.discourse.group/t/july-7-1947-arlington-va-blob-flying-at-500/594/1 "2026-07-07T00:08:31Z")

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10:30 p.m. Air Force Lt. Col. James O. Cobb sees from his bedroom window in Arlington, Virginia, a “blob” the size of a small airplane. It reflects white light and is flying at less than 500 feet above ground to the southeast at about 1,350 mph. [Eberhart]

Sources:  
NICAP, “Blob Flying at 500′”;

> **[UFO Report](https://www.nicap.org/470707arlington_dir.htm)**

Brad Sparks, Blue Books Unknowns Catalogue, Case 32, p. 22;

 ![07071947-ArlingtonVA-Sparks-Case32-p22](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/1/1bb8ba9bd6c7574d2e44739503614a2ce8c17c79.png)

PURSUE release, pp. 171–172;

 ![07071947-ArlingtonVA-SIGN-Incident80-p1](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/e/e990679aa43240e21d40130d6bca77bc0e59b02e.jpeg)

 ![07071947-ArlingtonVA-SIGN-Incident80-p2](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/1/1bdd34a6936b015a6d9d376c82c784c3a0d86266.jpeg)

[https://www.war.gov/medialink/ufo/release\_1/38\_143685\_box7\_incident\_summaries\_1-100.pdf](https://www.war.gov/medialink/ufo/release_1/38_143685_box7_incident_summaries_1-100.pdf)

PURSUE release, pp. 65–68;

 ![07071947-ArlingtonVA-65_hs1-834228961_62-hq-83894_serial_130-p65](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/1/14dfdad4c839c45e0fb9eb3c1d6fec6ef3d2b308.jpeg)

 ![07071947-ArlingtonVA-65_hs1-834228961_62-hq-83894_serial_130-p66](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/d/da25e32417263e1dccd30c3befce4410f811188e.jpeg)

 ![07071947-ArlingtonVA-65_hs1-834228961_62-hq-83894_serial_130-p67](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/3/387fe9da5c293da1e14cbfbf5da916be08b45982.jpeg)

 ![07071947-ArlingtonVA-65_hs1-834228961_62-hq-83894_serial_130-p68](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/3/3be08129895e1994d739858b867b460dda28c835.jpeg)

[https://www.war.gov/medialink/ufo/release\_1/65\_hs1-834228961\_62-hq-83894\_serial\_130.pdf](https://www.war.gov/medialink/ufo/release_1/65_hs1-834228961_62-hq-83894_serial_130.pdf)