Synopsis: On 20 Jan 13, the witness of this investigation was driving and noticed a large object in the sky. The witness stopped the vehicle and took a photo of the object. On March 8th, while reviewing the photo, the witness noticed a “dark line” that seemed to rip through the sky. The witness thought it was something on the vehicle’s windshield – but upon further inspected noted it was not.
Evidence Submitted: Original photo.
Initial Action: Case opened as an AN1.
Investigation and Findings: This investigation is closed.
Object Details: All indication point to the WITNESS having observed and photographed an upper atmospheric disturbance known as “shear instability” in the midst of forming. Researcher contacted a local expert and educator, Dr. James Carton, Chair of the Dept. of Atmospheric and Oceanic Studies at the University of MD who said in his e-mail reply of March 22, 2013: “Looks a bit like Shear Instability.” Further internet research showed instances of similar looking upper air disturbances. Although it cannot be stated with 100% certainty, all indications point to shear instability as the cause for the observed aerial phenomenon.
