Project Blue Book Case File
New Zealand, Winter 1951Circa 1951
Summary
In winter 1951, a New Zealand observer reported seeing a large cloud formation about 500 yards long, 500 yards wide, and 60 yards high to the east of his location. From the northern end of this cloud, a smaller piece suddenly detached itself. The detached portion resembled a whirlwind and traveled north for a short distance, then turned at a right angle and moved easterly. The main cloud remained motionless and was not immediately disturbed by this movement. As the small cloud piece traveled, it gradually formed into a more spherical shape. It eventually disappeared over the sea, about four miles to the east.
The observer submitted photographs of the phenomenon to the U.S. Air Force's Project Blue Book investigators. The Air Technical Intelligence Center analyzed the images and concluded that the object shown was a lenticular cloud, a type of lens-shaped cloud formation that often results from the specific atmospheric conditions the witness had described. The Center thanked the observer for his cooperation and interest in the U.S. Air Force's UFO investigation program, and requested permission to make enlarged prints from his negatives. Those negatives were subsequently returned to him.
The Air Force evaluation marked the case as "probably balloon," though the analysis clearly identified the phenomenon as a lenticular cloud formation resulting from natural atmospheric conditions. The full case file, comprising 16 pages held by the National Archives, is reproduced below.
Reported location
New Zealand, Winter 1951
Date of incident
Circa 1951
State / country
? / XX
Page count
16 scanned pages
USAF evaluation
unknown
Microfilm
T1206, Roll 9