Ellensburg, Washington UFO Sighting (May 5, 1947) — FBI Files
In May 1947, three travelers near Ellensburg, Washington, reported observing a silver object that entered a nose dive and disintegrated into a pillar of gas.
Background
On May 5, 194
7, in Ellensburg, Washington, U.S. government investigators recorded an unidentified-object incident later released to the public on May 8, 2026, as part of the Presidential Unsealing and Reporting System for UAP Encounters (PURSUE). This event occurred during a period of significant transition in American aerial surveillance and public perception of the skies. The incident is one of the first wave of “flying saucer” reports that swept the United States after the Kenneth Arnold sighting of June 1947 and the Roswell incident of July 1947. During this era, the sudden appearance of unidentified aerial phenomena prompted widespread speculation regarding both secret military technology and extraterrestrial visitors.
The Ellensburg report was filed with the Federal Bureau of Investigation, an agency that maintained a rigorous interest in any aerial activity that could potentially threaten national security. Under the Bureau’s standing protocols for the protection of vital installations, field offices in Knoxville, Albuquerque, Los Angeles, and other locations were tasked with routing UFO reports to headquarters. This administrative structure ensured that any sightings occurring near sensitive infrastructure or military corridors were centralized for federal review. The geographic location of Ellensburg, situated in the Kittitas Valley of central Washington, placed it within a region of the Pacific Northwest that was increasingly relevant to post-war aerospace development and strategic monitoring.
The Incident
On May 5, 1947, three individuals traveling between Ellensburg and Seattle observed a silver object streaking across the sky. The witnesses initially believed the object might be a jet plane, a common assumption given the rapid advancement of jet propulsion technology in the immediate post-war years. However, the object’s behavior deviated from the predictable flight paths of known aircraft. The object entered a nose dive but disintegrated before hitting the ground, leaving a long, stationary pillar of gas in its wake. The number of witnesses is not specified in the released document.
The official documentation contains specific descriptions of the phenomenon’s visual characteristics. The file notes that the observers “…sighted a silver object streaking across the skye.” The behavior of the resulting debris was noted as being particularly unusual, with the record stating, “…it was particularly odd because this remained in form end did not blow away.” The report further clarifies the altitude of the event, noting that “…it was still a long way from the earth” at the time the disintegration occurred.
Analysis and Classification
The case is classified as a visual sighting reported by ground or air observers. In the context of mid-century aeronautics, such sightings were often scrutinized against known atmospheric and man-made variables. Conventional candidates for sightings of this period include experimental aircraft, weather balloons—specifically the Project Mogul series which utilized high-altitude balloons to detect Soviet nuclear tests—atmospheric optical phenomena such as sundogs and lenticular clouds, and astronomical objects including Venus, the Moon, and meteors near the horizon.
All records released under the PURSUE program are designated unresolved by the All-domain Anomaly Resolution Office (AARO) by default. The federal government has not concluded that the events were anomalous, has not concluded that they were conventional, and has not ruled out either possibility. The Ellensburg sighting remains part of this broader category of unverified aerial phenomena, characterized by the lack of definitive physical evidence or conclusive identification of the object’s origin.