Documents / Official release
This U.S. Department of War file, undated, holds checklist summaries of incidents 1 to 100 of unidentified flying objects reported in 1947 and early 1948. The first entries cover sightings of silver discs and spheres by officers and staff at Muroc Army Air Field on 7 and 8 July 1947. Next come the Portland, Oregon police reports of 4 July, a United Air Lines crew near Emmett, Idaho, and a set of 30 December flame and explosion reports from California and Nevada. The file ends with two Finnish sightings.
From the source:Release of 2026-05-08 Incident: N/A, N/A. NARA Record Group 38, catalogue id 143685. Each of these incident summaries includes a "Check-List - Unidentified Flying Objects" that contains details about the incident. Many summaries also include witness lists or statements and other narrative reports or descriptions.
“Anderson”4 pages
Read from the scan by GLM-OCR; expect the odd misread word.
CHECK-LIST - UNIDENTIFIED FLYING OBJECTS Incident # 31 1. Date Mid-December 1946 2. Time Early morning 3. Location Northern Arizona, Route 66 4. Name of observer K. D. Wood 5. Occupation of observer Professor and Head Aeronautical Engineering 6. Address of observer University of Colorado, Boulder, Colorado 7. Placo of observation In flight on a trip through the southwest 8. Number of objects 1 9. Distance of object from observer Not stated 10. Time in sight Not stated 11. Altitude 20,000 feet to 50,000 feet 12. Speed 600 mph, $ \pm 2 0 0 $ 13. Direction of flight First vertical then West to East overhead 14. Tactics No maneuvers 15. Sound None 16. Size Not stated 17. Color - Did not see object 18. Shape Not stated - did not see object 19. Odor detected Not Stated 20. Apparent construction Not stated - did not see object 21. Exhaust trails White, heavy 22. Weather conditions Clear 23. Effect on clouds Not stated 24. Sketches or photographs None 25. Manner of disappearance Not stated 26. Remarks: Saw only vapor trail, like rocket or jet exhaust. Not like usual jet airplane trail.
Official release, from the pursue collection. The PDF is mirrored here; the original link is above. The text was read from the page images by GLM-OCR; expect the odd misread word. 209 pages are in the text index: search them above, or from the library's search.