AnomalyOn February 17, 2013 at 10:04 AM, several people in cars are intrigued by the presence in the clear sky of a phenomenon resembling white trails. Two photographs are attached to the testimony. The strange aspect of this observation lies in two factors: on the one hand, certain trails are not straight, and on the other hand, there are many of them. This can be explained by the particular weather conditions of that day: the rising autan wind, which is correlated with strong winds at altitude, which very quickly deforms airplane trails, and particular temperature and humidity conditions that make the trails persist for quite a long time. This case is classified "B": very likely observation of airplane trails, numerous and deformed following the autan wind (pressure drop regime, strong high-altitude winds).
Haute-Garonne, France · 2013-02-17 · from the GEIPAN archive
An account in Haute-Garonne, France
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This is an official case file of GEIPAN, the French space agency's unidentified aerospace phenomena office, machine translated from French. The original text and the full investigation file are at geipan.fr. We reproduce it with thanks and remove anything on request.