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.
Read from the scan by GLM-OCR; expect the odd misread word.
CHECK-LIST - UNIDENTIFIED FLYING OBJECTS
1. Date 24th June 1947
Incident #17
2. Time 1500
3. Location Mt. Ranier, Washington
4. Name of observer Kenneth Arnold
5. Occupation of observer Dealer in fire control supplies holds private
6. Address of observer Box 387. Boise. Idaho
7. Place of observation Near Mineral, Washington
8. Number of objects 9
9. Distance of object from observer 20 to 25 miles
10. Timo in sight 2-1/2 to 3 minutes
11. Altitude 9.500 ft
12. Speed Approx 150 MPH
13. Direction of flight North to South at $ 1 7 0^{\circ} $
Tactics Horizontal flight
Sound N/S
Size Approximately that of DC-4 - 45 to 50 ft
Color mirror like
18. Shapo Approximately circular
Odor detected N/S
20. Apparent construction I/S
Exhaust trails I/S
Weather conditions CAVU
Effect on clouds I/S
Sketches or photographs Drawings
Manner of disappearance N/S
Remarks: (over) 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.