Ft. Pierce, Florida & Vicinity, March 1961March 1961

On March 23 through 29, 1961, residents across the Fort Pierce, Florida area reported seeing unusual white lights in the western sky. These sightings sparked a series of UFO reports to Patrick Air Force Base. The lights appeared to have a brightness roughly three times that of the brightest stars, and witnesses said they changed intensity in a cyclic pattern. The lights seemed to move across the horizon from southeast to southwest, sometimes bobbing or moving up and down.

The Air Force took the reports seriously. Intelligence officers at Patrick Air Force Base investigated by flying a B-57 jet aircraft into the sighting area on March 31, 1961. During their flight, the investigator saw the same white light that ground witnesses had reported. Through binoculars, the light revealed red and green navigation lights characteristic of aircraft. When radar operators checked the position, they identified it as a commercial jet airliner heading to Miami. A second identical white light appeared shortly afterward, and radar confirmed it was another jet airliner (Delta Flight 833 on Air Way Victor 97).

The Air Force determined that the white lights were anti-collision beacons newly installed on some civil airliners for experimental purposes. The Federal Aviation Agency confirmed that several jet airliners and turboprop aircraft were using a new strobe-type white beacon light. When viewed from far away through hazy atmosphere at an angle, these lights appeared much larger and brighter than they actually were. The periodic flash, or "bobbing" effect, created an unusual appearance that explained witness reports of strange lights.

An additional incident explained another aspect of the reports. A jet pilot flying through the Fort Pierce area at 29,000 feet encountered unexpected clear air turbulence. Investigation revealed that a large muck fire burning in the Everglades was creating the turbulence. Heated air from the fire was being lifted by convection and pushed westward by surface winds, then caught by upper-altitude westerly winds that redirected it across the pilot's flight path. This matched turbulence reported by other aircrews who saw the UFO lights.

The Air Force concluded on March 31, 1961, that all the reported UFOs in the Fort Pierce area were observations of commercial jet airliners equipped with new experimental anti-collision beacons. The case was marked unknown by the Air Force evaluation system, though investigators recommended no further action. The file reproduces 21 pages of declassified documents as held by the National Archives.